./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe012_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/safe012_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe012_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe012_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:53:13,375 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:53:13,447 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:53:13,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:53:13,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:53:13,476 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:53:13,477 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:53:13,477 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:53:13,477 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:53:13,481 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:53:13,482 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:53:13,482 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:53:13,483 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:53:13,484 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:53:13,484 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:53:13,484 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:53:13,485 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:53:13,485 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:53:13,485 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:53:13,485 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:53:13,485 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:53:13,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:53:13,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:53:13,486 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:53:13,486 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:53:13,486 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:53:13,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:53:13,487 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:53:13,487 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:53:13,488 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:53:13,488 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:53:13,488 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:53:13,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:53:13,489 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:53:13,489 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:53:13,489 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:53:13,489 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:53:13,490 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:53:13,490 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:53:13,490 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:53:13,490 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:53:13,490 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:53:13,490 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:53:13,491 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:53:13,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:53:13,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:53:13,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:53:13,738 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:53:13,739 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:53:13,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe012_tso.yml/witness.yml [2024-06-14 13:53:13,879 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:53:13,881 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:53:13,882 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe012_tso.i [2024-06-14 13:53:14,859 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:53:15,068 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:53:15,071 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe012_tso.i [2024-06-14 13:53:15,083 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eff41497/671213d097f94033ad3b33870ee2d299/FLAG4c8aaf291 [2024-06-14 13:53:15,093 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eff41497/671213d097f94033ad3b33870ee2d299 [2024-06-14 13:53:15,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:53:15,095 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:53:15,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:53:15,095 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:53:15,099 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:53:15,100 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:53:13" (1/2) ... [2024-06-14 13:53:15,100 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f0a7341 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:53:15, skipping insertion in model container [2024-06-14 13:53:15,100 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:53:13" (1/2) ... [2024-06-14 13:53:15,101 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@78344163 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:53:15, skipping insertion in model container [2024-06-14 13:53:15,102 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:53:15" (2/2) ... [2024-06-14 13:53:15,102 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f0a7341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15, skipping insertion in model container [2024-06-14 13:53:15,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:53:15" (2/2) ... [2024-06-14 13:53:15,102 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:53:15,147 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:53:15,148 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:53:15,148 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:53:15,148 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:53:15,148 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:53:15,149 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-14 13:53:15,183 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:53:15,507 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:53:15,517 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:53:15,625 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:53:15,666 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:53:15,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15 WrapperNode [2024-06-14 13:53:15,667 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:53:15,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:53:15,668 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:53:15,668 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:53:15,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,688 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,716 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-14 13:53:15,716 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:53:15,717 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:53:15,717 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:53:15,717 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:53:15,726 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,726 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,729 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,740 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 13:53:15,741 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,741 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,746 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,749 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,752 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:53:15,753 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:53:15,753 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:53:15,753 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:53:15,754 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (1/1) ... [2024-06-14 13:53:15,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:53:15,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:53:15,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:53:15,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:53:15,812 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:53:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:53:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:53:15,813 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:53:15,813 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:53:15,814 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:53:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:53:15,814 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:53:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:53:15,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:53:15,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:53:15,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:53:15,816 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:53:15,947 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:53:15,949 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:53:16,169 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:53:16,169 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:53:16,277 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:53:16,277 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:53:16,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:53:16 BoogieIcfgContainer [2024-06-14 13:53:16,277 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:53:16,279 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:53:16,279 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:53:16,281 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:53:16,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:53:13" (1/4) ... [2024-06-14 13:53:16,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f6a627 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:53:16, skipping insertion in model container [2024-06-14 13:53:16,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:53:15" (2/4) ... [2024-06-14 13:53:16,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f6a627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:53:16, skipping insertion in model container [2024-06-14 13:53:16,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:53:15" (3/4) ... [2024-06-14 13:53:16,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73f6a627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:53:16, skipping insertion in model container [2024-06-14 13:53:16,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:53:16" (4/4) ... [2024-06-14 13:53:16,284 INFO L112 eAbstractionObserver]: Analyzing ICFG safe012_tso.i [2024-06-14 13:53:16,297 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:53:16,297 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:53:16,298 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:53:16,352 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:53:16,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:53:16,424 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 13:53:16,424 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:53:16,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:53:16,427 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:53:16,430 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 13:53:16,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:53:16,451 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;@d823b09, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:53:16,452 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:53:16,461 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:53:16,461 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:53:16,461 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:53:16,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:16,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:53:16,463 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:16,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:16,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1786995326, now seen corresponding path program 1 times [2024-06-14 13:53:16,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:16,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076023112] [2024-06-14 13:53:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:16,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:17,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:17,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076023112] [2024-06-14 13:53:17,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076023112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:17,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:17,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:53:17,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413912958] [2024-06-14 13:53:17,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:17,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:53:17,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:17,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:53:17,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:53:17,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-14 13:53:17,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:17,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:17,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-14 13:53:17,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:17,304 INFO L124 PetriNetUnfolderBase]: 430/730 cut-off events. [2024-06-14 13:53:17,304 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-06-14 13:53:17,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 730 events. 430/730 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3662 event pairs, 241 based on Foata normal form. 1/693 useless extension candidates. Maximal degree in co-relation 1440. Up to 672 conditions per place. [2024-06-14 13:53:17,316 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 13:53:17,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-14 13:53:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:53:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:53:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-14 13:53:17,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-14 13:53:17,329 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-14 13:53:17,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-14 13:53:17,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:17,334 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 13:53:17,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 13:53:17,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 13:53:17,339 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 13:53:17,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:17,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:17,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:17,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:53:17,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:17,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2051141202, now seen corresponding path program 1 times [2024-06-14 13:53:17,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:17,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655290499] [2024-06-14 13:53:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:17,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:17,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655290499] [2024-06-14 13:53:17,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655290499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:17,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:17,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:17,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948722391] [2024-06-14 13:53:17,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:17,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:17,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:17,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:17,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:17,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:17,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:17,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:17,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:18,011 INFO L124 PetriNetUnfolderBase]: 755/1248 cut-off events. [2024-06-14 13:53:18,011 INFO L125 PetriNetUnfolderBase]: For 222/236 co-relation queries the response was YES. [2024-06-14 13:53:18,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2843 conditions, 1248 events. 755/1248 cut-off events. For 222/236 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6082 event pairs, 249 based on Foata normal form. 13/1224 useless extension candidates. Maximal degree in co-relation 2828. Up to 1093 conditions per place. [2024-06-14 13:53:18,018 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 37 selfloop transitions, 6 changer transitions 0/50 dead transitions. [2024-06-14 13:53:18,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 224 flow [2024-06-14 13:53:18,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:53:18,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:53:18,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 13:53:18,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 13:53:18,022 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 102 transitions. [2024-06-14 13:53:18,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 224 flow [2024-06-14 13:53:18,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 50 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:53:18,025 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 123 flow [2024-06-14 13:53:18,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2024-06-14 13:53:18,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-06-14 13:53:18,026 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 123 flow [2024-06-14 13:53:18,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:18,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:18,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:18,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:53:18,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:18,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:18,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1294877559, now seen corresponding path program 1 times [2024-06-14 13:53:18,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:18,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058470680] [2024-06-14 13:53:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:18,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:18,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:18,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058470680] [2024-06-14 13:53:18,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058470680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:18,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:18,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:53:18,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805399070] [2024-06-14 13:53:18,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:18,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:53:18,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:53:18,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:53:18,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-14 13:53:18,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:18,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:18,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-14 13:53:18,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:18,542 INFO L124 PetriNetUnfolderBase]: 583/984 cut-off events. [2024-06-14 13:53:18,543 INFO L125 PetriNetUnfolderBase]: For 494/497 co-relation queries the response was YES. [2024-06-14 13:53:18,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2454 conditions, 984 events. 583/984 cut-off events. For 494/497 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4826 event pairs, 249 based on Foata normal form. 4/986 useless extension candidates. Maximal degree in co-relation 2437. Up to 889 conditions per place. [2024-06-14 13:53:18,549 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 13:53:18,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 265 flow [2024-06-14 13:53:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:53:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:53:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-14 13:53:18,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 13:53:18,552 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 123 flow. Second operand 4 states and 102 transitions. [2024-06-14 13:53:18,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 265 flow [2024-06-14 13:53:18,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 248 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:18,556 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 166 flow [2024-06-14 13:53:18,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-14 13:53:18,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 5 predicate places. [2024-06-14 13:53:18,557 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 166 flow [2024-06-14 13:53:18,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:18,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:18,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:18,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:53:18,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:18,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1486499389, now seen corresponding path program 1 times [2024-06-14 13:53:18,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:18,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340617722] [2024-06-14 13:53:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:18,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:18,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:18,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340617722] [2024-06-14 13:53:18,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340617722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:18,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:18,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:53:18,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869941845] [2024-06-14 13:53:18,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:18,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:53:18,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:18,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:53:18,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:53:18,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:18,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:18,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:18,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:18,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:19,067 INFO L124 PetriNetUnfolderBase]: 697/1162 cut-off events. [2024-06-14 13:53:19,067 INFO L125 PetriNetUnfolderBase]: For 899/899 co-relation queries the response was YES. [2024-06-14 13:53:19,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 1162 events. 697/1162 cut-off events. For 899/899 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5759 event pairs, 304 based on Foata normal form. 2/1163 useless extension candidates. Maximal degree in co-relation 3156. Up to 1047 conditions per place. [2024-06-14 13:53:19,074 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 13:53:19,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 66 transitions, 357 flow [2024-06-14 13:53:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:19,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:19,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:53:19,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:53:19,076 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 166 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:53:19,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 66 transitions, 357 flow [2024-06-14 13:53:19,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 66 transitions, 353 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 13:53:19,078 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 247 flow [2024-06-14 13:53:19,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-14 13:53:19,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-14 13:53:19,079 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 247 flow [2024-06-14 13:53:19,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:19,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:19,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:19,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:53:19,080 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:19,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:19,080 INFO L85 PathProgramCache]: Analyzing trace with hash 609729492, now seen corresponding path program 1 times [2024-06-14 13:53:19,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:19,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767024194] [2024-06-14 13:53:19,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:19,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:19,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:19,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767024194] [2024-06-14 13:53:19,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767024194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:19,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:19,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:19,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561081068] [2024-06-14 13:53:19,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:19,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:19,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:19,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:19,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:19,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:19,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 247 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:19,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:19,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:19,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:19,605 INFO L124 PetriNetUnfolderBase]: 845/1411 cut-off events. [2024-06-14 13:53:19,605 INFO L125 PetriNetUnfolderBase]: For 1978/2016 co-relation queries the response was YES. [2024-06-14 13:53:19,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4317 conditions, 1411 events. 845/1411 cut-off events. For 1978/2016 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7049 event pairs, 287 based on Foata normal form. 9/1401 useless extension candidates. Maximal degree in co-relation 4293. Up to 1212 conditions per place. [2024-06-14 13:53:19,613 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 15 changer transitions 0/67 dead transitions. [2024-06-14 13:53:19,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 409 flow [2024-06-14 13:53:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:53:19,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:53:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-14 13:53:19,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-14 13:53:19,614 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 247 flow. Second operand 4 states and 103 transitions. [2024-06-14 13:53:19,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 409 flow [2024-06-14 13:53:19,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 407 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 13:53:19,618 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 312 flow [2024-06-14 13:53:19,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=312, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-14 13:53:19,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 13:53:19,619 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 312 flow [2024-06-14 13:53:19,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:19,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:19,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:19,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:53:19,619 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:19,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:19,620 INFO L85 PathProgramCache]: Analyzing trace with hash 630405252, now seen corresponding path program 2 times [2024-06-14 13:53:19,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:19,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743067845] [2024-06-14 13:53:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:19,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:19,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:19,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743067845] [2024-06-14 13:53:19,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743067845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:19,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:19,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:19,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78785863] [2024-06-14 13:53:19,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:19,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:19,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:19,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:19,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:19,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:19,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:19,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:19,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:19,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:20,136 INFO L124 PetriNetUnfolderBase]: 840/1406 cut-off events. [2024-06-14 13:53:20,136 INFO L125 PetriNetUnfolderBase]: For 3058/3101 co-relation queries the response was YES. [2024-06-14 13:53:20,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4758 conditions, 1406 events. 840/1406 cut-off events. For 3058/3101 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7030 event pairs, 287 based on Foata normal form. 11/1399 useless extension candidates. Maximal degree in co-relation 4731. Up to 1194 conditions per place. [2024-06-14 13:53:20,146 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 18 changer transitions 0/74 dead transitions. [2024-06-14 13:53:20,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 74 transitions, 504 flow [2024-06-14 13:53:20,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 13:53:20,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-14 13:53:20,147 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 312 flow. Second operand 5 states and 124 transitions. [2024-06-14 13:53:20,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 74 transitions, 504 flow [2024-06-14 13:53:20,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 467 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:20,152 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 348 flow [2024-06-14 13:53:20,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-14 13:53:20,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-14 13:53:20,153 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 348 flow [2024-06-14 13:53:20,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:20,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:20,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:20,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:53:20,154 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:20,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:20,154 INFO L85 PathProgramCache]: Analyzing trace with hash 22549742, now seen corresponding path program 1 times [2024-06-14 13:53:20,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:20,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871688072] [2024-06-14 13:53:20,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:20,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:20,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:20,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:20,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:20,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871688072] [2024-06-14 13:53:20,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871688072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:20,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:20,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969034017] [2024-06-14 13:53:20,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:20,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:20,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:20,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:20,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:20,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 348 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:20,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:20,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:20,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:20,680 INFO L124 PetriNetUnfolderBase]: 697/1170 cut-off events. [2024-06-14 13:53:20,680 INFO L125 PetriNetUnfolderBase]: For 2545/2545 co-relation queries the response was YES. [2024-06-14 13:53:20,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 1170 events. 697/1170 cut-off events. For 2545/2545 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5872 event pairs, 274 based on Foata normal form. 4/1173 useless extension candidates. Maximal degree in co-relation 3983. Up to 1029 conditions per place. [2024-06-14 13:53:20,688 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 60 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-14 13:53:20,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 552 flow [2024-06-14 13:53:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:20,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:53:20,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:53:20,690 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 348 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:53:20,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 552 flow [2024-06-14 13:53:20,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 79 transitions, 509 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:20,693 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 350 flow [2024-06-14 13:53:20,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=350, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-14 13:53:20,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-14 13:53:20,694 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 350 flow [2024-06-14 13:53:20,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:20,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:20,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:20,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:53:20,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:20,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:20,696 INFO L85 PathProgramCache]: Analyzing trace with hash -508420352, now seen corresponding path program 1 times [2024-06-14 13:53:20,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:20,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767748981] [2024-06-14 13:53:20,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:20,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:20,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:21,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:21,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:21,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767748981] [2024-06-14 13:53:21,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767748981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:21,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:21,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:21,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546761663] [2024-06-14 13:53:21,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:21,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:21,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:21,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:21,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:21,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:21,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:21,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:21,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:21,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:21,248 INFO L124 PetriNetUnfolderBase]: 888/1469 cut-off events. [2024-06-14 13:53:21,249 INFO L125 PetriNetUnfolderBase]: For 3704/3704 co-relation queries the response was YES. [2024-06-14 13:53:21,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5127 conditions, 1469 events. 888/1469 cut-off events. For 3704/3704 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7189 event pairs, 310 based on Foata normal form. 2/1470 useless extension candidates. Maximal degree in co-relation 5098. Up to 1253 conditions per place. [2024-06-14 13:53:21,258 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 18 changer transitions 0/86 dead transitions. [2024-06-14 13:53:21,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 608 flow [2024-06-14 13:53:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:21,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 13:53:21,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-14 13:53:21,260 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 350 flow. Second operand 5 states and 122 transitions. [2024-06-14 13:53:21,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 608 flow [2024-06-14 13:53:21,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 581 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:21,265 INFO L231 Difference]: Finished difference. Result has 67 places, 68 transitions, 453 flow [2024-06-14 13:53:21,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2024-06-14 13:53:21,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-14 13:53:21,266 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 453 flow [2024-06-14 13:53:21,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:21,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:21,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:21,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:53:21,267 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:21,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:21,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1932267364, now seen corresponding path program 2 times [2024-06-14 13:53:21,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:21,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009256624] [2024-06-14 13:53:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:21,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:21,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:21,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009256624] [2024-06-14 13:53:21,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009256624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:21,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:21,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:21,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069396328] [2024-06-14 13:53:21,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:21,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:21,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:21,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:21,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:21,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:21,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 453 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:21,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:21,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:21,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:21,767 INFO L124 PetriNetUnfolderBase]: 899/1490 cut-off events. [2024-06-14 13:53:21,768 INFO L125 PetriNetUnfolderBase]: For 4914/4914 co-relation queries the response was YES. [2024-06-14 13:53:21,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5608 conditions, 1490 events. 899/1490 cut-off events. For 4914/4914 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7347 event pairs, 304 based on Foata normal form. 2/1491 useless extension candidates. Maximal degree in co-relation 5576. Up to 1240 conditions per place. [2024-06-14 13:53:21,778 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 69 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-14 13:53:21,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 101 transitions, 793 flow [2024-06-14 13:53:21,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:53:21,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:53:21,779 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 453 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:53:21,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 101 transitions, 793 flow [2024-06-14 13:53:21,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 773 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-14 13:53:21,788 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 577 flow [2024-06-14 13:53:21,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=577, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-14 13:53:21,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-14 13:53:21,789 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 577 flow [2024-06-14 13:53:21,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:21,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:21,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:21,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:53:21,790 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:21,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1932272944, now seen corresponding path program 3 times [2024-06-14 13:53:21,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:21,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588245741] [2024-06-14 13:53:21,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:21,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:22,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:22,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588245741] [2024-06-14 13:53:22,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588245741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:22,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:22,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:22,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173436400] [2024-06-14 13:53:22,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:22,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:22,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:22,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:22,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:22,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:22,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 577 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:22,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:22,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:22,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:22,371 INFO L124 PetriNetUnfolderBase]: 894/1483 cut-off events. [2024-06-14 13:53:22,371 INFO L125 PetriNetUnfolderBase]: For 6427/6427 co-relation queries the response was YES. [2024-06-14 13:53:22,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5972 conditions, 1483 events. 894/1483 cut-off events. For 6427/6427 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7262 event pairs, 304 based on Foata normal form. 2/1484 useless extension candidates. Maximal degree in co-relation 5936. Up to 1235 conditions per place. [2024-06-14 13:53:22,382 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 67 selfloop transitions, 25 changer transitions 0/98 dead transitions. [2024-06-14 13:53:22,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 98 transitions, 813 flow [2024-06-14 13:53:22,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:22,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 13:53:22,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 13:53:22,383 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 577 flow. Second operand 6 states and 142 transitions. [2024-06-14 13:53:22,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 98 transitions, 813 flow [2024-06-14 13:53:22,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 98 transitions, 779 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-14 13:53:22,395 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 601 flow [2024-06-14 13:53:22,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=601, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2024-06-14 13:53:22,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-14 13:53:22,396 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 601 flow [2024-06-14 13:53:22,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:22,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:22,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:22,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:53:22,397 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:22,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:22,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1619345834, now seen corresponding path program 1 times [2024-06-14 13:53:22,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:22,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038037137] [2024-06-14 13:53:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:22,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:22,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:22,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038037137] [2024-06-14 13:53:22,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038037137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:22,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:22,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:53:22,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620506525] [2024-06-14 13:53:22,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:22,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:53:22,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:22,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:53:22,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:53:22,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:22,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 601 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:22,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:22,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:22,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:22,940 INFO L124 PetriNetUnfolderBase]: 845/1417 cut-off events. [2024-06-14 13:53:22,940 INFO L125 PetriNetUnfolderBase]: For 6727/6727 co-relation queries the response was YES. [2024-06-14 13:53:22,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5850 conditions, 1417 events. 845/1417 cut-off events. For 6727/6727 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7063 event pairs, 290 based on Foata normal form. 1/1418 useless extension candidates. Maximal degree in co-relation 5812. Up to 1245 conditions per place. [2024-06-14 13:53:22,950 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 72 selfloop transitions, 8 changer transitions 0/93 dead transitions. [2024-06-14 13:53:22,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 93 transitions, 845 flow [2024-06-14 13:53:22,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:53:22,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:53:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 13:53:22,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:53:22,951 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 601 flow. Second operand 4 states and 96 transitions. [2024-06-14 13:53:22,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 93 transitions, 845 flow [2024-06-14 13:53:22,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 93 transitions, 766 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:22,963 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 617 flow [2024-06-14 13:53:22,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=617, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-14 13:53:22,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-14 13:53:22,964 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 617 flow [2024-06-14 13:53:22,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:22,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:22,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:22,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:53:22,965 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:22,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:22,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1734872291, now seen corresponding path program 1 times [2024-06-14 13:53:22,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:22,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330618046] [2024-06-14 13:53:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:22,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:23,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:23,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330618046] [2024-06-14 13:53:23,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330618046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:23,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:23,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:23,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360390280] [2024-06-14 13:53:23,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:23,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:23,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:23,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:23,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:23,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:23,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 617 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:23,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:23,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:23,551 INFO L124 PetriNetUnfolderBase]: 892/1479 cut-off events. [2024-06-14 13:53:23,552 INFO L125 PetriNetUnfolderBase]: For 9217/9225 co-relation queries the response was YES. [2024-06-14 13:53:23,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6441 conditions, 1479 events. 892/1479 cut-off events. For 9217/9225 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7404 event pairs, 180 based on Foata normal form. 10/1437 useless extension candidates. Maximal degree in co-relation 6402. Up to 1166 conditions per place. [2024-06-14 13:53:23,562 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 67 selfloop transitions, 28 changer transitions 0/112 dead transitions. [2024-06-14 13:53:23,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 112 transitions, 937 flow [2024-06-14 13:53:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 13:53:23,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-14 13:53:23,564 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 617 flow. Second operand 6 states and 148 transitions. [2024-06-14 13:53:23,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 112 transitions, 937 flow [2024-06-14 13:53:23,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 933 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 13:53:23,576 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 712 flow [2024-06-14 13:53:23,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=712, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-14 13:53:23,577 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-14 13:53:23,577 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 712 flow [2024-06-14 13:53:23,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:23,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:23,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:53:23,578 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:23,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:23,578 INFO L85 PathProgramCache]: Analyzing trace with hash -44827059, now seen corresponding path program 2 times [2024-06-14 13:53:23,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:23,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247527687] [2024-06-14 13:53:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:23,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:23,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:23,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:23,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247527687] [2024-06-14 13:53:23,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247527687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:23,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:23,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:23,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281818569] [2024-06-14 13:53:23,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:23,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:23,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:23,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:23,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:23,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 712 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:23,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:23,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:24,135 INFO L124 PetriNetUnfolderBase]: 880/1459 cut-off events. [2024-06-14 13:53:24,136 INFO L125 PetriNetUnfolderBase]: For 10965/10980 co-relation queries the response was YES. [2024-06-14 13:53:24,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6698 conditions, 1459 events. 880/1459 cut-off events. For 10965/10980 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7326 event pairs, 247 based on Foata normal form. 8/1414 useless extension candidates. Maximal degree in co-relation 6656. Up to 1215 conditions per place. [2024-06-14 13:53:24,146 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 64 selfloop transitions, 24 changer transitions 0/105 dead transitions. [2024-06-14 13:53:24,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 105 transitions, 932 flow [2024-06-14 13:53:24,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:24,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 13:53:24,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-14 13:53:24,148 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 712 flow. Second operand 5 states and 124 transitions. [2024-06-14 13:53:24,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 105 transitions, 932 flow [2024-06-14 13:53:24,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 105 transitions, 882 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:24,160 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 718 flow [2024-06-14 13:53:24,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-06-14 13:53:24,161 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-14 13:53:24,161 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 718 flow [2024-06-14 13:53:24,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:24,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:24,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:24,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:53:24,162 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:24,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash 229076675, now seen corresponding path program 3 times [2024-06-14 13:53:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:24,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914430508] [2024-06-14 13:53:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:24,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:24,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:24,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914430508] [2024-06-14 13:53:24,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914430508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:24,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:24,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:24,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279731210] [2024-06-14 13:53:24,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:24,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:24,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:24,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:24,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 718 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:24,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:24,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:24,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:24,700 INFO L124 PetriNetUnfolderBase]: 868/1441 cut-off events. [2024-06-14 13:53:24,700 INFO L125 PetriNetUnfolderBase]: For 11898/11907 co-relation queries the response was YES. [2024-06-14 13:53:24,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6702 conditions, 1441 events. 868/1441 cut-off events. For 11898/11907 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7226 event pairs, 242 based on Foata normal form. 6/1395 useless extension candidates. Maximal degree in co-relation 6658. Up to 1188 conditions per place. [2024-06-14 13:53:24,711 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 29 changer transitions 0/111 dead transitions. [2024-06-14 13:53:24,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 111 transitions, 980 flow [2024-06-14 13:53:24,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:24,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 13:53:24,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 13:53:24,713 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 718 flow. Second operand 6 states and 145 transitions. [2024-06-14 13:53:24,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 111 transitions, 980 flow [2024-06-14 13:53:24,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 111 transitions, 926 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:24,727 INFO L231 Difference]: Finished difference. Result has 90 places, 90 transitions, 754 flow [2024-06-14 13:53:24,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=754, PETRI_PLACES=90, PETRI_TRANSITIONS=90} [2024-06-14 13:53:24,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-14 13:53:24,727 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 90 transitions, 754 flow [2024-06-14 13:53:24,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:24,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:24,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:24,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:53:24,728 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:24,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash -559864735, now seen corresponding path program 1 times [2024-06-14 13:53:24,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:24,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623260999] [2024-06-14 13:53:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:24,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:25,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:25,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623260999] [2024-06-14 13:53:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623260999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:25,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:25,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499963419] [2024-06-14 13:53:25,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:25,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:25,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:25,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 90 transitions, 754 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:25,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:25,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:25,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:25,343 INFO L124 PetriNetUnfolderBase]: 1055/1744 cut-off events. [2024-06-14 13:53:25,343 INFO L125 PetriNetUnfolderBase]: For 13796/13796 co-relation queries the response was YES. [2024-06-14 13:53:25,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7958 conditions, 1744 events. 1055/1744 cut-off events. For 13796/13796 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9016 event pairs, 156 based on Foata normal form. 12/1755 useless extension candidates. Maximal degree in co-relation 7913. Up to 1206 conditions per place. [2024-06-14 13:53:25,357 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 24 changer transitions 0/132 dead transitions. [2024-06-14 13:53:25,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1203 flow [2024-06-14 13:53:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:25,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 13:53:25,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 13:53:25,360 INFO L175 Difference]: Start difference. First operand has 90 places, 90 transitions, 754 flow. Second operand 7 states and 170 transitions. [2024-06-14 13:53:25,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1203 flow [2024-06-14 13:53:25,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 132 transitions, 1133 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:25,377 INFO L231 Difference]: Finished difference. Result has 95 places, 95 transitions, 785 flow [2024-06-14 13:53:25,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=785, PETRI_PLACES=95, PETRI_TRANSITIONS=95} [2024-06-14 13:53:25,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 13:53:25,379 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 95 transitions, 785 flow [2024-06-14 13:53:25,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:25,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:25,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:25,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:53:25,380 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:25,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:25,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1389634385, now seen corresponding path program 2 times [2024-06-14 13:53:25,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:25,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086191144] [2024-06-14 13:53:25,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:25,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:25,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:25,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:25,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086191144] [2024-06-14 13:53:25,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086191144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:25,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:25,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:25,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225658373] [2024-06-14 13:53:25,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:25,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:25,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:25,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:25,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:25,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:25,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 95 transitions, 785 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:25,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:25,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:25,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:25,988 INFO L124 PetriNetUnfolderBase]: 1088/1813 cut-off events. [2024-06-14 13:53:25,989 INFO L125 PetriNetUnfolderBase]: For 15576/15576 co-relation queries the response was YES. [2024-06-14 13:53:25,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8335 conditions, 1813 events. 1088/1813 cut-off events. For 15576/15576 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9554 event pairs, 257 based on Foata normal form. 16/1828 useless extension candidates. Maximal degree in co-relation 8287. Up to 1451 conditions per place. [2024-06-14 13:53:26,001 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 95 selfloop transitions, 22 changer transitions 0/123 dead transitions. [2024-06-14 13:53:26,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 123 transitions, 1117 flow [2024-06-14 13:53:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:53:26,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 13:53:26,003 INFO L175 Difference]: Start difference. First operand has 95 places, 95 transitions, 785 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:53:26,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 123 transitions, 1117 flow [2024-06-14 13:53:26,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 123 transitions, 1091 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:26,026 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 824 flow [2024-06-14 13:53:26,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=824, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2024-06-14 13:53:26,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-14 13:53:26,027 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 824 flow [2024-06-14 13:53:26,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:26,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:26,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:26,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:53:26,028 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:26,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1389638105, now seen corresponding path program 3 times [2024-06-14 13:53:26,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:26,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238801412] [2024-06-14 13:53:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:26,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:26,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:26,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:26,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238801412] [2024-06-14 13:53:26,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238801412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:26,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:26,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:26,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875923957] [2024-06-14 13:53:26,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:26,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:26,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:26,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:26,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:26,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:26,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 824 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:26,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:26,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:26,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:26,640 INFO L124 PetriNetUnfolderBase]: 1068/1781 cut-off events. [2024-06-14 13:53:26,641 INFO L125 PetriNetUnfolderBase]: For 15858/15858 co-relation queries the response was YES. [2024-06-14 13:53:26,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8324 conditions, 1781 events. 1068/1781 cut-off events. For 15858/15858 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9329 event pairs, 226 based on Foata normal form. 12/1792 useless extension candidates. Maximal degree in co-relation 8274. Up to 1332 conditions per place. [2024-06-14 13:53:26,655 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 99 selfloop transitions, 23 changer transitions 0/128 dead transitions. [2024-06-14 13:53:26,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 128 transitions, 1192 flow [2024-06-14 13:53:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:53:26,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:53:26,657 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 824 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:53:26,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 128 transitions, 1192 flow [2024-06-14 13:53:26,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 128 transitions, 1154 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:26,677 INFO L231 Difference]: Finished difference. Result has 102 places, 99 transitions, 878 flow [2024-06-14 13:53:26,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=878, PETRI_PLACES=102, PETRI_TRANSITIONS=99} [2024-06-14 13:53:26,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-14 13:53:26,678 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 99 transitions, 878 flow [2024-06-14 13:53:26,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:26,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:26,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:26,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:53:26,679 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:26,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:26,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1483046693, now seen corresponding path program 4 times [2024-06-14 13:53:26,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:26,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472612363] [2024-06-14 13:53:26,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:26,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:26,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:26,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472612363] [2024-06-14 13:53:26,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472612363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:26,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:26,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150744323] [2024-06-14 13:53:26,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:26,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:26,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:26,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:26,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:26,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 99 transitions, 878 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:26,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:26,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:26,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:27,247 INFO L124 PetriNetUnfolderBase]: 1126/1879 cut-off events. [2024-06-14 13:53:27,248 INFO L125 PetriNetUnfolderBase]: For 18658/18658 co-relation queries the response was YES. [2024-06-14 13:53:27,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8870 conditions, 1879 events. 1126/1879 cut-off events. For 18658/18658 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9978 event pairs, 310 based on Foata normal form. 16/1894 useless extension candidates. Maximal degree in co-relation 8818. Up to 1536 conditions per place. [2024-06-14 13:53:27,262 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 28 changer transitions 0/130 dead transitions. [2024-06-14 13:53:27,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 130 transitions, 1229 flow [2024-06-14 13:53:27,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:27,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:27,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:53:27,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:53:27,264 INFO L175 Difference]: Start difference. First operand has 102 places, 99 transitions, 878 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:53:27,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 130 transitions, 1229 flow [2024-06-14 13:53:27,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 130 transitions, 1205 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:27,288 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 927 flow [2024-06-14 13:53:27,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=927, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2024-06-14 13:53:27,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-14 13:53:27,289 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 927 flow [2024-06-14 13:53:27,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:27,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:27,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:27,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:53:27,290 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:27,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:27,290 INFO L85 PathProgramCache]: Analyzing trace with hash 314374365, now seen corresponding path program 5 times [2024-06-14 13:53:27,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:27,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838358353] [2024-06-14 13:53:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:27,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:27,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:27,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838358353] [2024-06-14 13:53:27,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838358353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:27,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:27,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:27,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563144732] [2024-06-14 13:53:27,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:27,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:27,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:27,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:27,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 927 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:27,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:27,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:27,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:27,869 INFO L124 PetriNetUnfolderBase]: 1184/1987 cut-off events. [2024-06-14 13:53:27,869 INFO L125 PetriNetUnfolderBase]: For 20875/20875 co-relation queries the response was YES. [2024-06-14 13:53:27,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9486 conditions, 1987 events. 1184/1987 cut-off events. For 20875/20875 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10741 event pairs, 325 based on Foata normal form. 16/2002 useless extension candidates. Maximal degree in co-relation 9432. Up to 1634 conditions per place. [2024-06-14 13:53:27,885 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 97 selfloop transitions, 27 changer transitions 0/130 dead transitions. [2024-06-14 13:53:27,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 130 transitions, 1276 flow [2024-06-14 13:53:27,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:53:27,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:53:27,888 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 927 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:53:27,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 130 transitions, 1276 flow [2024-06-14 13:53:27,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 130 transitions, 1219 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:27,916 INFO L231 Difference]: Finished difference. Result has 109 places, 101 transitions, 943 flow [2024-06-14 13:53:27,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=943, PETRI_PLACES=109, PETRI_TRANSITIONS=101} [2024-06-14 13:53:27,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-14 13:53:27,916 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 101 transitions, 943 flow [2024-06-14 13:53:27,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:27,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:27,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:27,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:53:27,917 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:27,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:27,917 INFO L85 PathProgramCache]: Analyzing trace with hash 314226495, now seen corresponding path program 6 times [2024-06-14 13:53:27,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:27,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320620369] [2024-06-14 13:53:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:27,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:28,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:28,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320620369] [2024-06-14 13:53:28,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320620369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:28,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:28,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:28,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617367646] [2024-06-14 13:53:28,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:28,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:28,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:28,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:28,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:28,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:28,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 101 transitions, 943 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:28,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:28,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:28,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:28,543 INFO L124 PetriNetUnfolderBase]: 1200/2019 cut-off events. [2024-06-14 13:53:28,544 INFO L125 PetriNetUnfolderBase]: For 21828/21828 co-relation queries the response was YES. [2024-06-14 13:53:28,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9624 conditions, 2019 events. 1200/2019 cut-off events. For 21828/21828 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 11007 event pairs, 316 based on Foata normal form. 12/2030 useless extension candidates. Maximal degree in co-relation 9569. Up to 1487 conditions per place. [2024-06-14 13:53:28,558 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 100 selfloop transitions, 30 changer transitions 0/136 dead transitions. [2024-06-14 13:53:28,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 136 transitions, 1334 flow [2024-06-14 13:53:28,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:28,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:53:28,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 13:53:28,560 INFO L175 Difference]: Start difference. First operand has 109 places, 101 transitions, 943 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:53:28,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 136 transitions, 1334 flow [2024-06-14 13:53:28,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 136 transitions, 1277 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:28,587 INFO L231 Difference]: Finished difference. Result has 112 places, 104 transitions, 993 flow [2024-06-14 13:53:28,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=993, PETRI_PLACES=112, PETRI_TRANSITIONS=104} [2024-06-14 13:53:28,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-14 13:53:28,588 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 104 transitions, 993 flow [2024-06-14 13:53:28,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:28,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:28,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:28,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:53:28,589 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:28,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:28,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1482831491, now seen corresponding path program 1 times [2024-06-14 13:53:28,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:28,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432400551] [2024-06-14 13:53:28,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:28,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:28,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:28,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432400551] [2024-06-14 13:53:28,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432400551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:28,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:28,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:28,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405750235] [2024-06-14 13:53:28,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:28,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:28,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:28,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:28,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:28,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:28,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 104 transitions, 993 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:28,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:28,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:28,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:29,196 INFO L124 PetriNetUnfolderBase]: 1180/1987 cut-off events. [2024-06-14 13:53:29,197 INFO L125 PetriNetUnfolderBase]: For 21985/21985 co-relation queries the response was YES. [2024-06-14 13:53:29,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9464 conditions, 1987 events. 1180/1987 cut-off events. For 21985/21985 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10789 event pairs, 268 based on Foata normal form. 12/1998 useless extension candidates. Maximal degree in co-relation 9407. Up to 1335 conditions per place. [2024-06-14 13:53:29,215 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 99 selfloop transitions, 32 changer transitions 0/137 dead transitions. [2024-06-14 13:53:29,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 137 transitions, 1332 flow [2024-06-14 13:53:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:53:29,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 13:53:29,216 INFO L175 Difference]: Start difference. First operand has 112 places, 104 transitions, 993 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:53:29,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 137 transitions, 1332 flow [2024-06-14 13:53:29,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 137 transitions, 1290 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:29,247 INFO L231 Difference]: Finished difference. Result has 115 places, 103 transitions, 981 flow [2024-06-14 13:53:29,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=913, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=981, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2024-06-14 13:53:29,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-14 13:53:29,248 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 981 flow [2024-06-14 13:53:29,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:29,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:29,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:29,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:53:29,248 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:29,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:29,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1198249931, now seen corresponding path program 1 times [2024-06-14 13:53:29,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:29,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295029321] [2024-06-14 13:53:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:29,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:29,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:29,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:29,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295029321] [2024-06-14 13:53:29,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295029321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:29,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:29,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:29,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435344180] [2024-06-14 13:53:29,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:29,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:29,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:29,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:29,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:29,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:29,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 103 transitions, 981 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:29,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:29,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:29,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:29,820 INFO L124 PetriNetUnfolderBase]: 1130/1922 cut-off events. [2024-06-14 13:53:29,821 INFO L125 PetriNetUnfolderBase]: For 22202/22207 co-relation queries the response was YES. [2024-06-14 13:53:29,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9377 conditions, 1922 events. 1130/1922 cut-off events. For 22202/22207 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10656 event pairs, 311 based on Foata normal form. 7/1920 useless extension candidates. Maximal degree in co-relation 9318. Up to 1705 conditions per place. [2024-06-14 13:53:29,837 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 83 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2024-06-14 13:53:29,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 114 transitions, 1227 flow [2024-06-14 13:53:29,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:53:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:53:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-14 13:53:29,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-14 13:53:29,839 INFO L175 Difference]: Start difference. First operand has 115 places, 103 transitions, 981 flow. Second operand 4 states and 97 transitions. [2024-06-14 13:53:29,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 114 transitions, 1227 flow [2024-06-14 13:53:29,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 1119 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:29,871 INFO L231 Difference]: Finished difference. Result has 112 places, 106 transitions, 950 flow [2024-06-14 13:53:29,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=950, PETRI_PLACES=112, PETRI_TRANSITIONS=106} [2024-06-14 13:53:29,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-14 13:53:29,872 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 106 transitions, 950 flow [2024-06-14 13:53:29,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:29,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:29,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:29,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:53:29,872 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:29,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:29,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1551885911, now seen corresponding path program 2 times [2024-06-14 13:53:29,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:29,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250424192] [2024-06-14 13:53:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:29,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:30,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:30,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250424192] [2024-06-14 13:53:30,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250424192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:30,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:30,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:30,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986361077] [2024-06-14 13:53:30,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:30,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:30,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:30,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:30,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:30,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:30,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 106 transitions, 950 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:30,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:30,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:30,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:30,493 INFO L124 PetriNetUnfolderBase]: 1125/1927 cut-off events. [2024-06-14 13:53:30,493 INFO L125 PetriNetUnfolderBase]: For 22879/22879 co-relation queries the response was YES. [2024-06-14 13:53:30,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9261 conditions, 1927 events. 1125/1927 cut-off events. For 22879/22879 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 10665 event pairs, 299 based on Foata normal form. 2/1922 useless extension candidates. Maximal degree in co-relation 9203. Up to 1695 conditions per place. [2024-06-14 13:53:30,511 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 92 selfloop transitions, 22 changer transitions 0/127 dead transitions. [2024-06-14 13:53:30,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 127 transitions, 1259 flow [2024-06-14 13:53:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:30,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 13:53:30,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 13:53:30,513 INFO L175 Difference]: Start difference. First operand has 112 places, 106 transitions, 950 flow. Second operand 7 states and 156 transitions. [2024-06-14 13:53:30,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 127 transitions, 1259 flow [2024-06-14 13:53:30,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 127 transitions, 1208 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:30,545 INFO L231 Difference]: Finished difference. Result has 117 places, 109 transitions, 985 flow [2024-06-14 13:53:30,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=985, PETRI_PLACES=117, PETRI_TRANSITIONS=109} [2024-06-14 13:53:30,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-14 13:53:30,546 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 109 transitions, 985 flow [2024-06-14 13:53:30,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:30,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:30,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:30,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:53:30,546 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:30,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash -305851225, now seen corresponding path program 1 times [2024-06-14 13:53:30,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:30,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375489908] [2024-06-14 13:53:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:30,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:30,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:30,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375489908] [2024-06-14 13:53:30,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375489908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:30,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:30,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:30,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020018711] [2024-06-14 13:53:30,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:30,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:30,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:30,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:30,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:30,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:30,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 109 transitions, 985 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:30,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:30,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:30,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:31,130 INFO L124 PetriNetUnfolderBase]: 1115/1939 cut-off events. [2024-06-14 13:53:31,131 INFO L125 PetriNetUnfolderBase]: For 23917/23917 co-relation queries the response was YES. [2024-06-14 13:53:31,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9478 conditions, 1939 events. 1115/1939 cut-off events. For 23917/23917 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10825 event pairs, 302 based on Foata normal form. 2/1940 useless extension candidates. Maximal degree in co-relation 9419. Up to 1706 conditions per place. [2024-06-14 13:53:31,145 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 100 selfloop transitions, 23 changer transitions 0/132 dead transitions. [2024-06-14 13:53:31,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 132 transitions, 1375 flow [2024-06-14 13:53:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:31,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 13:53:31,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:53:31,146 INFO L175 Difference]: Start difference. First operand has 117 places, 109 transitions, 985 flow. Second operand 6 states and 140 transitions. [2024-06-14 13:53:31,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 132 transitions, 1375 flow [2024-06-14 13:53:31,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 132 transitions, 1289 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:31,177 INFO L231 Difference]: Finished difference. Result has 116 places, 115 transitions, 1017 flow [2024-06-14 13:53:31,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1017, PETRI_PLACES=116, PETRI_TRANSITIONS=115} [2024-06-14 13:53:31,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-14 13:53:31,178 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 115 transitions, 1017 flow [2024-06-14 13:53:31,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:31,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:31,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:31,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:53:31,179 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:31,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:31,182 INFO L85 PathProgramCache]: Analyzing trace with hash -476549005, now seen corresponding path program 2 times [2024-06-14 13:53:31,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:31,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244367772] [2024-06-14 13:53:31,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:31,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:31,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244367772] [2024-06-14 13:53:31,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244367772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:31,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:31,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:31,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429869092] [2024-06-14 13:53:31,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:31,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:31,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:31,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 115 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:31,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:31,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:31,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:31,767 INFO L124 PetriNetUnfolderBase]: 1133/1969 cut-off events. [2024-06-14 13:53:31,767 INFO L125 PetriNetUnfolderBase]: For 26278/26278 co-relation queries the response was YES. [2024-06-14 13:53:31,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9917 conditions, 1969 events. 1133/1969 cut-off events. For 26278/26278 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11022 event pairs, 302 based on Foata normal form. 2/1970 useless extension candidates. Maximal degree in co-relation 9860. Up to 1754 conditions per place. [2024-06-14 13:53:31,781 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 104 selfloop transitions, 21 changer transitions 0/134 dead transitions. [2024-06-14 13:53:31,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 134 transitions, 1371 flow [2024-06-14 13:53:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:31,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 13:53:31,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:53:31,782 INFO L175 Difference]: Start difference. First operand has 116 places, 115 transitions, 1017 flow. Second operand 6 states and 135 transitions. [2024-06-14 13:53:31,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 134 transitions, 1371 flow [2024-06-14 13:53:31,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 134 transitions, 1303 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:31,819 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 1075 flow [2024-06-14 13:53:31,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1075, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-06-14 13:53:31,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-14 13:53:31,820 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 1075 flow [2024-06-14 13:53:31,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:31,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:31,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:31,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:53:31,821 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:31,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:31,821 INFO L85 PathProgramCache]: Analyzing trace with hash -476548819, now seen corresponding path program 1 times [2024-06-14 13:53:31,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:31,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660127882] [2024-06-14 13:53:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:31,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:32,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:32,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660127882] [2024-06-14 13:53:32,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660127882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:32,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:32,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:32,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161881576] [2024-06-14 13:53:32,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:32,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:32,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:32,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:32,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:32,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:32,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 1075 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:32,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:32,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:32,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:32,369 INFO L124 PetriNetUnfolderBase]: 1219/2068 cut-off events. [2024-06-14 13:53:32,370 INFO L125 PetriNetUnfolderBase]: For 27939/27939 co-relation queries the response was YES. [2024-06-14 13:53:32,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10259 conditions, 2068 events. 1219/2068 cut-off events. For 27939/27939 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11371 event pairs, 302 based on Foata normal form. 1/2069 useless extension candidates. Maximal degree in co-relation 10201. Up to 1872 conditions per place. [2024-06-14 13:53:32,384 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 124 selfloop transitions, 19 changer transitions 0/149 dead transitions. [2024-06-14 13:53:32,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 149 transitions, 1572 flow [2024-06-14 13:53:32,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:32,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:32,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 13:53:32,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-14 13:53:32,386 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 1075 flow. Second operand 6 states and 133 transitions. [2024-06-14 13:53:32,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 149 transitions, 1572 flow [2024-06-14 13:53:32,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 149 transitions, 1501 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:32,416 INFO L231 Difference]: Finished difference. Result has 124 places, 133 transitions, 1191 flow [2024-06-14 13:53:32,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1191, PETRI_PLACES=124, PETRI_TRANSITIONS=133} [2024-06-14 13:53:32,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-14 13:53:32,417 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 133 transitions, 1191 flow [2024-06-14 13:53:32,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:32,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:32,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:32,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:53:32,418 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:32,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:32,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1552117109, now seen corresponding path program 2 times [2024-06-14 13:53:32,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:32,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507365780] [2024-06-14 13:53:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:32,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:32,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:32,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507365780] [2024-06-14 13:53:32,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507365780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:32,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:32,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:32,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360046309] [2024-06-14 13:53:32,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:32,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:32,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:32,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:32,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:32,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:32,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 133 transitions, 1191 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:32,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:32,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:32,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:32,957 INFO L124 PetriNetUnfolderBase]: 1224/2075 cut-off events. [2024-06-14 13:53:32,957 INFO L125 PetriNetUnfolderBase]: For 30222/30222 co-relation queries the response was YES. [2024-06-14 13:53:32,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10560 conditions, 2075 events. 1224/2075 cut-off events. For 30222/30222 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11432 event pairs, 302 based on Foata normal form. 1/2076 useless extension candidates. Maximal degree in co-relation 10499. Up to 1878 conditions per place. [2024-06-14 13:53:32,972 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 123 selfloop transitions, 22 changer transitions 0/151 dead transitions. [2024-06-14 13:53:32,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 151 transitions, 1607 flow [2024-06-14 13:53:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:32,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:32,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 13:53:32,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-14 13:53:32,974 INFO L175 Difference]: Start difference. First operand has 124 places, 133 transitions, 1191 flow. Second operand 5 states and 116 transitions. [2024-06-14 13:53:32,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 151 transitions, 1607 flow [2024-06-14 13:53:33,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 151 transitions, 1571 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:33,016 INFO L231 Difference]: Finished difference. Result has 128 places, 137 transitions, 1260 flow [2024-06-14 13:53:33,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1157, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1260, PETRI_PLACES=128, PETRI_TRANSITIONS=137} [2024-06-14 13:53:33,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-14 13:53:33,017 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 137 transitions, 1260 flow [2024-06-14 13:53:33,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:33,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:33,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:33,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:53:33,018 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:33,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:33,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1551879959, now seen corresponding path program 3 times [2024-06-14 13:53:33,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:33,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354311531] [2024-06-14 13:53:33,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:33,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:33,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:33,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354311531] [2024-06-14 13:53:33,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354311531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:33,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:33,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:33,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003998241] [2024-06-14 13:53:33,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:33,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:33,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:33,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:33,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 137 transitions, 1260 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:33,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:33,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:33,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:33,512 INFO L124 PetriNetUnfolderBase]: 1221/2072 cut-off events. [2024-06-14 13:53:33,512 INFO L125 PetriNetUnfolderBase]: For 32238/32242 co-relation queries the response was YES. [2024-06-14 13:53:33,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10592 conditions, 2072 events. 1221/2072 cut-off events. For 32238/32242 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11418 event pairs, 307 based on Foata normal form. 5/2077 useless extension candidates. Maximal degree in co-relation 10529. Up to 1875 conditions per place. [2024-06-14 13:53:33,527 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 120 selfloop transitions, 22 changer transitions 0/148 dead transitions. [2024-06-14 13:53:33,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 148 transitions, 1583 flow [2024-06-14 13:53:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-14 13:53:33,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-14 13:53:33,528 INFO L175 Difference]: Start difference. First operand has 128 places, 137 transitions, 1260 flow. Second operand 5 states and 111 transitions. [2024-06-14 13:53:33,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 148 transitions, 1583 flow [2024-06-14 13:53:33,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 148 transitions, 1532 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:33,570 INFO L231 Difference]: Finished difference. Result has 130 places, 138 transitions, 1267 flow [2024-06-14 13:53:33,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1267, PETRI_PLACES=130, PETRI_TRANSITIONS=138} [2024-06-14 13:53:33,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-14 13:53:33,574 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 138 transitions, 1267 flow [2024-06-14 13:53:33,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:33,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:33,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:33,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:53:33,575 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:33,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:33,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1552117295, now seen corresponding path program 3 times [2024-06-14 13:53:33,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:33,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748655332] [2024-06-14 13:53:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:33,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:33,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:33,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748655332] [2024-06-14 13:53:33,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748655332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:33,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:33,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:33,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174631152] [2024-06-14 13:53:33,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:33,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:33,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:33,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:33,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:33,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:33,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 138 transitions, 1267 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:33,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:33,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:33,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:34,147 INFO L124 PetriNetUnfolderBase]: 1159/1998 cut-off events. [2024-06-14 13:53:34,147 INFO L125 PetriNetUnfolderBase]: For 31628/31628 co-relation queries the response was YES. [2024-06-14 13:53:34,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10229 conditions, 1998 events. 1159/1998 cut-off events. For 31628/31628 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11145 event pairs, 301 based on Foata normal form. 2/1999 useless extension candidates. Maximal degree in co-relation 10166. Up to 1730 conditions per place. [2024-06-14 13:53:34,160 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 108 selfloop transitions, 31 changer transitions 0/153 dead transitions. [2024-06-14 13:53:34,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 153 transitions, 1583 flow [2024-06-14 13:53:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:34,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 13:53:34,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-14 13:53:34,161 INFO L175 Difference]: Start difference. First operand has 130 places, 138 transitions, 1267 flow. Second operand 5 states and 121 transitions. [2024-06-14 13:53:34,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 153 transitions, 1583 flow [2024-06-14 13:53:34,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 153 transitions, 1537 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:34,207 INFO L231 Difference]: Finished difference. Result has 133 places, 138 transitions, 1300 flow [2024-06-14 13:53:34,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1300, PETRI_PLACES=133, PETRI_TRANSITIONS=138} [2024-06-14 13:53:34,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-14 13:53:34,208 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 138 transitions, 1300 flow [2024-06-14 13:53:34,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:34,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:34,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:34,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:53:34,209 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:34,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:34,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1551871031, now seen corresponding path program 1 times [2024-06-14 13:53:34,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:34,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639981318] [2024-06-14 13:53:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:34,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:34,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:34,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639981318] [2024-06-14 13:53:34,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639981318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:34,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:34,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:53:34,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044909689] [2024-06-14 13:53:34,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:34,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:53:34,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:34,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:53:34,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:53:34,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:34,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 138 transitions, 1300 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:34,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:34,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:34,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:34,722 INFO L124 PetriNetUnfolderBase]: 1157/1980 cut-off events. [2024-06-14 13:53:34,722 INFO L125 PetriNetUnfolderBase]: For 32963/32963 co-relation queries the response was YES. [2024-06-14 13:53:34,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10246 conditions, 1980 events. 1157/1980 cut-off events. For 32963/32963 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10945 event pairs, 295 based on Foata normal form. 2/1975 useless extension candidates. Maximal degree in co-relation 10181. Up to 1753 conditions per place. [2024-06-14 13:53:34,735 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 124 selfloop transitions, 10 changer transitions 0/151 dead transitions. [2024-06-14 13:53:34,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 151 transitions, 1615 flow [2024-06-14 13:53:34,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:34,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:34,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-14 13:53:34,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-14 13:53:34,737 INFO L175 Difference]: Start difference. First operand has 133 places, 138 transitions, 1300 flow. Second operand 5 states and 113 transitions. [2024-06-14 13:53:34,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 151 transitions, 1615 flow [2024-06-14 13:53:34,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 151 transitions, 1551 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:34,783 INFO L231 Difference]: Finished difference. Result has 134 places, 140 transitions, 1279 flow [2024-06-14 13:53:34,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1279, PETRI_PLACES=134, PETRI_TRANSITIONS=140} [2024-06-14 13:53:34,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-14 13:53:34,783 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 140 transitions, 1279 flow [2024-06-14 13:53:34,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:34,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:34,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:34,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:53:34,784 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:34,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:34,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1891835097, now seen corresponding path program 1 times [2024-06-14 13:53:34,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:34,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081549189] [2024-06-14 13:53:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:34,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:35,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:35,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081549189] [2024-06-14 13:53:35,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081549189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:35,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:35,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:35,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238825588] [2024-06-14 13:53:35,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:35,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:35,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:35,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:35,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:35,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:35,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 140 transitions, 1279 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:35,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:35,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:35,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:35,338 INFO L124 PetriNetUnfolderBase]: 1215/2052 cut-off events. [2024-06-14 13:53:35,338 INFO L125 PetriNetUnfolderBase]: For 32735/32735 co-relation queries the response was YES. [2024-06-14 13:53:35,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10604 conditions, 2052 events. 1215/2052 cut-off events. For 32735/32735 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11224 event pairs, 300 based on Foata normal form. 1/2053 useless extension candidates. Maximal degree in co-relation 10538. Up to 1834 conditions per place. [2024-06-14 13:53:35,353 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 134 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-14 13:53:35,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 174 transitions, 1850 flow [2024-06-14 13:53:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:35,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 13:53:35,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 13:53:35,354 INFO L175 Difference]: Start difference. First operand has 134 places, 140 transitions, 1279 flow. Second operand 7 states and 155 transitions. [2024-06-14 13:53:35,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 174 transitions, 1850 flow [2024-06-14 13:53:35,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 174 transitions, 1828 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:35,408 INFO L231 Difference]: Finished difference. Result has 141 places, 153 transitions, 1482 flow [2024-06-14 13:53:35,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1482, PETRI_PLACES=141, PETRI_TRANSITIONS=153} [2024-06-14 13:53:35,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-14 13:53:35,409 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 153 transitions, 1482 flow [2024-06-14 13:53:35,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:35,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:35,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:35,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:53:35,409 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:35,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:35,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1888110447, now seen corresponding path program 2 times [2024-06-14 13:53:35,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:35,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454349721] [2024-06-14 13:53:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:35,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:35,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:35,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454349721] [2024-06-14 13:53:35,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454349721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:35,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:35,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:35,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003595371] [2024-06-14 13:53:35,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:35,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:35,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:35,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:35,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:35,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 153 transitions, 1482 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:35,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:35,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:35,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:36,020 INFO L124 PetriNetUnfolderBase]: 1228/2074 cut-off events. [2024-06-14 13:53:36,020 INFO L125 PetriNetUnfolderBase]: For 36321/36321 co-relation queries the response was YES. [2024-06-14 13:53:36,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11154 conditions, 2074 events. 1228/2074 cut-off events. For 36321/36321 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11347 event pairs, 300 based on Foata normal form. 1/2075 useless extension candidates. Maximal degree in co-relation 11084. Up to 1875 conditions per place. [2024-06-14 13:53:36,035 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 141 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2024-06-14 13:53:36,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 179 transitions, 2013 flow [2024-06-14 13:53:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:36,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:36,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 13:53:36,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4986449864498645 [2024-06-14 13:53:36,036 INFO L175 Difference]: Start difference. First operand has 141 places, 153 transitions, 1482 flow. Second operand 9 states and 184 transitions. [2024-06-14 13:53:36,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 179 transitions, 2013 flow [2024-06-14 13:53:36,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 179 transitions, 1953 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:36,098 INFO L231 Difference]: Finished difference. Result has 149 places, 161 transitions, 1586 flow [2024-06-14 13:53:36,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1432, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1586, PETRI_PLACES=149, PETRI_TRANSITIONS=161} [2024-06-14 13:53:36,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 13:53:36,098 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 161 transitions, 1586 flow [2024-06-14 13:53:36,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:36,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:36,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:36,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:53:36,099 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:36,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:36,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1888116027, now seen corresponding path program 3 times [2024-06-14 13:53:36,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:36,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494181469] [2024-06-14 13:53:36,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:36,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:36,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:36,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494181469] [2024-06-14 13:53:36,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494181469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:36,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:36,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:36,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372217066] [2024-06-14 13:53:36,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:36,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:36,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:36,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:36,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 161 transitions, 1586 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:36,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:36,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:36,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:36,705 INFO L124 PetriNetUnfolderBase]: 1225/2070 cut-off events. [2024-06-14 13:53:36,705 INFO L125 PetriNetUnfolderBase]: For 38182/38182 co-relation queries the response was YES. [2024-06-14 13:53:36,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11246 conditions, 2070 events. 1225/2070 cut-off events. For 38182/38182 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11343 event pairs, 300 based on Foata normal form. 1/2071 useless extension candidates. Maximal degree in co-relation 11173. Up to 1872 conditions per place. [2024-06-14 13:53:36,718 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 139 selfloop transitions, 31 changer transitions 0/176 dead transitions. [2024-06-14 13:53:36,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 176 transitions, 1969 flow [2024-06-14 13:53:36,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:36,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-14 13:53:36,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-14 13:53:36,719 INFO L175 Difference]: Start difference. First operand has 149 places, 161 transitions, 1586 flow. Second operand 7 states and 151 transitions. [2024-06-14 13:53:36,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 176 transitions, 1969 flow [2024-06-14 13:53:36,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 176 transitions, 1911 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:36,785 INFO L231 Difference]: Finished difference. Result has 152 places, 161 transitions, 1596 flow [2024-06-14 13:53:36,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1596, PETRI_PLACES=152, PETRI_TRANSITIONS=161} [2024-06-14 13:53:36,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-14 13:53:36,785 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 161 transitions, 1596 flow [2024-06-14 13:53:36,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:36,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:36,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:36,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:53:36,786 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:36,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:36,786 INFO L85 PathProgramCache]: Analyzing trace with hash -863637419, now seen corresponding path program 4 times [2024-06-14 13:53:36,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:36,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058765552] [2024-06-14 13:53:36,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:36,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:37,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:37,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058765552] [2024-06-14 13:53:37,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058765552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:37,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:37,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:37,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441341792] [2024-06-14 13:53:37,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:37,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:37,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:37,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:37,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:37,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 161 transitions, 1596 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:37,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:37,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:37,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:37,354 INFO L124 PetriNetUnfolderBase]: 1230/2080 cut-off events. [2024-06-14 13:53:37,354 INFO L125 PetriNetUnfolderBase]: For 40940/40946 co-relation queries the response was YES. [2024-06-14 13:53:37,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11421 conditions, 2080 events. 1230/2080 cut-off events. For 40940/40946 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11430 event pairs, 305 based on Foata normal form. 7/2087 useless extension candidates. Maximal degree in co-relation 11346. Up to 1858 conditions per place. [2024-06-14 13:53:37,368 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 135 selfloop transitions, 42 changer transitions 0/183 dead transitions. [2024-06-14 13:53:37,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 183 transitions, 2106 flow [2024-06-14 13:53:37,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:37,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 13:53:37,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-14 13:53:37,369 INFO L175 Difference]: Start difference. First operand has 152 places, 161 transitions, 1596 flow. Second operand 8 states and 167 transitions. [2024-06-14 13:53:37,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 183 transitions, 2106 flow [2024-06-14 13:53:37,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 2044 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:37,454 INFO L231 Difference]: Finished difference. Result has 155 places, 166 transitions, 1688 flow [2024-06-14 13:53:37,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1688, PETRI_PLACES=155, PETRI_TRANSITIONS=166} [2024-06-14 13:53:37,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-14 13:53:37,454 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 166 transitions, 1688 flow [2024-06-14 13:53:37,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:37,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:37,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:37,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:53:37,455 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:37,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash -870989069, now seen corresponding path program 5 times [2024-06-14 13:53:37,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:37,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105140030] [2024-06-14 13:53:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:37,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:37,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:37,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105140030] [2024-06-14 13:53:37,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105140030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:37,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:37,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:37,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014600460] [2024-06-14 13:53:37,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:37,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:37,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:37,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:37,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:37,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:37,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 166 transitions, 1688 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:37,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:37,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:37,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:38,099 INFO L124 PetriNetUnfolderBase]: 1235/2088 cut-off events. [2024-06-14 13:53:38,099 INFO L125 PetriNetUnfolderBase]: For 43021/43021 co-relation queries the response was YES. [2024-06-14 13:53:38,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11620 conditions, 2088 events. 1235/2088 cut-off events. For 43021/43021 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11465 event pairs, 300 based on Foata normal form. 1/2089 useless extension candidates. Maximal degree in co-relation 11543. Up to 1864 conditions per place. [2024-06-14 13:53:38,116 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 137 selfloop transitions, 46 changer transitions 0/189 dead transitions. [2024-06-14 13:53:38,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 189 transitions, 2210 flow [2024-06-14 13:53:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 13:53:38,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:53:38,117 INFO L175 Difference]: Start difference. First operand has 155 places, 166 transitions, 1688 flow. Second operand 8 states and 172 transitions. [2024-06-14 13:53:38,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 189 transitions, 2210 flow [2024-06-14 13:53:38,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 189 transitions, 2094 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:38,214 INFO L231 Difference]: Finished difference. Result has 158 places, 169 transitions, 1715 flow [2024-06-14 13:53:38,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1715, PETRI_PLACES=158, PETRI_TRANSITIONS=169} [2024-06-14 13:53:38,215 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 13:53:38,215 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 169 transitions, 1715 flow [2024-06-14 13:53:38,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:38,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:38,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:53:38,216 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:38,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:38,216 INFO L85 PathProgramCache]: Analyzing trace with hash -870994649, now seen corresponding path program 6 times [2024-06-14 13:53:38,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:38,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710726283] [2024-06-14 13:53:38,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:38,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:38,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:38,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710726283] [2024-06-14 13:53:38,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710726283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:38,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:38,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:38,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333946824] [2024-06-14 13:53:38,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:38,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:38,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:38,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:38,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 169 transitions, 1715 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:38,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:38,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:38,817 INFO L124 PetriNetUnfolderBase]: 1232/2084 cut-off events. [2024-06-14 13:53:38,818 INFO L125 PetriNetUnfolderBase]: For 44881/44881 co-relation queries the response was YES. [2024-06-14 13:53:38,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11631 conditions, 2084 events. 1232/2084 cut-off events. For 44881/44881 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11452 event pairs, 300 based on Foata normal form. 1/2085 useless extension candidates. Maximal degree in co-relation 11553. Up to 1861 conditions per place. [2024-06-14 13:53:38,833 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 136 selfloop transitions, 44 changer transitions 0/186 dead transitions. [2024-06-14 13:53:38,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 186 transitions, 2124 flow [2024-06-14 13:53:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:38,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:38,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:53:38,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 13:53:38,835 INFO L175 Difference]: Start difference. First operand has 158 places, 169 transitions, 1715 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:53:38,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 186 transitions, 2124 flow [2024-06-14 13:53:38,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 186 transitions, 2019 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:38,924 INFO L231 Difference]: Finished difference. Result has 158 places, 169 transitions, 1708 flow [2024-06-14 13:53:38,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1708, PETRI_PLACES=158, PETRI_TRANSITIONS=169} [2024-06-14 13:53:38,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 13:53:38,924 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 169 transitions, 1708 flow [2024-06-14 13:53:38,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:38,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:38,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:53:38,925 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:38,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:38,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1476233490, now seen corresponding path program 1 times [2024-06-14 13:53:38,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:38,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009061317] [2024-06-14 13:53:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:38,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:39,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:39,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009061317] [2024-06-14 13:53:39,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009061317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:39,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:39,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:39,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511101695] [2024-06-14 13:53:39,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:39,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:39,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:39,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:39,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:39,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:39,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 169 transitions, 1708 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:39,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:39,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:39,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:39,544 INFO L124 PetriNetUnfolderBase]: 1245/2106 cut-off events. [2024-06-14 13:53:39,544 INFO L125 PetriNetUnfolderBase]: For 45502/45508 co-relation queries the response was YES. [2024-06-14 13:53:39,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11753 conditions, 2106 events. 1245/2106 cut-off events. For 45502/45508 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11622 event pairs, 308 based on Foata normal form. 7/2113 useless extension candidates. Maximal degree in co-relation 11675. Up to 1853 conditions per place. [2024-06-14 13:53:39,559 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 143 selfloop transitions, 45 changer transitions 0/194 dead transitions. [2024-06-14 13:53:39,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 194 transitions, 2260 flow [2024-06-14 13:53:39,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:39,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-14 13:53:39,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-14 13:53:39,560 INFO L175 Difference]: Start difference. First operand has 158 places, 169 transitions, 1708 flow. Second operand 8 states and 171 transitions. [2024-06-14 13:53:39,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 194 transitions, 2260 flow [2024-06-14 13:53:39,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 194 transitions, 2164 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:39,642 INFO L231 Difference]: Finished difference. Result has 161 places, 178 transitions, 1808 flow [2024-06-14 13:53:39,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1808, PETRI_PLACES=161, PETRI_TRANSITIONS=178} [2024-06-14 13:53:39,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-14 13:53:39,643 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 178 transitions, 1808 flow [2024-06-14 13:53:39,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:39,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:39,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:39,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:53:39,643 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:39,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash -749313892, now seen corresponding path program 2 times [2024-06-14 13:53:39,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:39,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341562191] [2024-06-14 13:53:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:39,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:39,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:39,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341562191] [2024-06-14 13:53:39,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341562191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:39,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:39,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:39,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955412751] [2024-06-14 13:53:39,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:39,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:39,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:39,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:39,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:39,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 178 transitions, 1808 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:39,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:39,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:39,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:40,258 INFO L124 PetriNetUnfolderBase]: 1250/2113 cut-off events. [2024-06-14 13:53:40,259 INFO L125 PetriNetUnfolderBase]: For 45919/45925 co-relation queries the response was YES. [2024-06-14 13:53:40,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11971 conditions, 2113 events. 1250/2113 cut-off events. For 45919/45925 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11647 event pairs, 308 based on Foata normal form. 7/2120 useless extension candidates. Maximal degree in co-relation 11892. Up to 1859 conditions per place. [2024-06-14 13:53:40,272 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 46 changer transitions 0/196 dead transitions. [2024-06-14 13:53:40,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 196 transitions, 2322 flow [2024-06-14 13:53:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 13:53:40,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-14 13:53:40,274 INFO L175 Difference]: Start difference. First operand has 161 places, 178 transitions, 1808 flow. Second operand 7 states and 153 transitions. [2024-06-14 13:53:40,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 196 transitions, 2322 flow [2024-06-14 13:53:40,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 196 transitions, 2260 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:40,353 INFO L231 Difference]: Finished difference. Result has 165 places, 181 transitions, 1892 flow [2024-06-14 13:53:40,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1750, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1892, PETRI_PLACES=165, PETRI_TRANSITIONS=181} [2024-06-14 13:53:40,353 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-14 13:53:40,353 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 181 transitions, 1892 flow [2024-06-14 13:53:40,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:40,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:40,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:53:40,354 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:40,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash -785950312, now seen corresponding path program 3 times [2024-06-14 13:53:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:40,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405714769] [2024-06-14 13:53:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:40,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:40,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:40,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405714769] [2024-06-14 13:53:40,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405714769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:40,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:40,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:40,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23376320] [2024-06-14 13:53:40,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:40,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:40,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:40,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:40,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:40,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:40,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 181 transitions, 1892 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:40,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:40,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:40,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:40,912 INFO L124 PetriNetUnfolderBase]: 1247/2111 cut-off events. [2024-06-14 13:53:40,912 INFO L125 PetriNetUnfolderBase]: For 48876/48888 co-relation queries the response was YES. [2024-06-14 13:53:40,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12087 conditions, 2111 events. 1247/2111 cut-off events. For 48876/48888 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11666 event pairs, 320 based on Foata normal form. 13/2124 useless extension candidates. Maximal degree in co-relation 12006. Up to 1856 conditions per place. [2024-06-14 13:53:40,930 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 142 selfloop transitions, 42 changer transitions 0/190 dead transitions. [2024-06-14 13:53:40,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 190 transitions, 2282 flow [2024-06-14 13:53:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:40,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-14 13:53:40,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-14 13:53:40,931 INFO L175 Difference]: Start difference. First operand has 165 places, 181 transitions, 1892 flow. Second operand 5 states and 114 transitions. [2024-06-14 13:53:40,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 190 transitions, 2282 flow [2024-06-14 13:53:41,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 190 transitions, 2166 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:41,025 INFO L231 Difference]: Finished difference. Result has 164 places, 181 transitions, 1870 flow [2024-06-14 13:53:41,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1870, PETRI_PLACES=164, PETRI_TRANSITIONS=181} [2024-06-14 13:53:41,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-14 13:53:41,026 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 181 transitions, 1870 flow [2024-06-14 13:53:41,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:41,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:41,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:41,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:53:41,026 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:41,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:41,026 INFO L85 PathProgramCache]: Analyzing trace with hash -785710744, now seen corresponding path program 1 times [2024-06-14 13:53:41,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:41,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866065040] [2024-06-14 13:53:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:41,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:41,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:41,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866065040] [2024-06-14 13:53:41,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866065040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:41,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:41,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:41,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041135464] [2024-06-14 13:53:41,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:41,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:41,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:41,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:41,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:41,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 181 transitions, 1870 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:41,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:41,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:41,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:41,633 INFO L124 PetriNetUnfolderBase]: 1228/2084 cut-off events. [2024-06-14 13:53:41,634 INFO L125 PetriNetUnfolderBase]: For 49904/49913 co-relation queries the response was YES. [2024-06-14 13:53:41,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11831 conditions, 2084 events. 1228/2084 cut-off events. For 49904/49913 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 11607 event pairs, 309 based on Foata normal form. 15/2088 useless extension candidates. Maximal degree in co-relation 11751. Up to 1773 conditions per place. [2024-06-14 13:53:41,651 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 151 selfloop transitions, 23 changer transitions 0/195 dead transitions. [2024-06-14 13:53:41,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 195 transitions, 2284 flow [2024-06-14 13:53:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:41,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 13:53:41,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 13:53:41,652 INFO L175 Difference]: Start difference. First operand has 164 places, 181 transitions, 1870 flow. Second operand 5 states and 118 transitions. [2024-06-14 13:53:41,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 195 transitions, 2284 flow [2024-06-14 13:53:41,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 195 transitions, 2194 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:41,733 INFO L231 Difference]: Finished difference. Result has 164 places, 182 transitions, 1849 flow [2024-06-14 13:53:41,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1849, PETRI_PLACES=164, PETRI_TRANSITIONS=182} [2024-06-14 13:53:41,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-14 13:53:41,733 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 182 transitions, 1849 flow [2024-06-14 13:53:41,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:41,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:41,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:41,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:53:41,734 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:41,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash 523277960, now seen corresponding path program 4 times [2024-06-14 13:53:41,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:41,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963613678] [2024-06-14 13:53:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:41,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:42,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:42,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963613678] [2024-06-14 13:53:42,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963613678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:42,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:42,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:42,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615783535] [2024-06-14 13:53:42,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:42,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:42,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:42,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:42,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:42,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:42,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 182 transitions, 1849 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:42,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:42,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:42,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:42,364 INFO L124 PetriNetUnfolderBase]: 1288/2170 cut-off events. [2024-06-14 13:53:42,365 INFO L125 PetriNetUnfolderBase]: For 46145/46145 co-relation queries the response was YES. [2024-06-14 13:53:42,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12315 conditions, 2170 events. 1288/2170 cut-off events. For 46145/46145 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 11928 event pairs, 303 based on Foata normal form. 1/2171 useless extension candidates. Maximal degree in co-relation 12235. Up to 1905 conditions per place. [2024-06-14 13:53:42,381 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 56 changer transitions 0/220 dead transitions. [2024-06-14 13:53:42,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 220 transitions, 2506 flow [2024-06-14 13:53:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:42,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 13:53:42,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:53:42,382 INFO L175 Difference]: Start difference. First operand has 164 places, 182 transitions, 1849 flow. Second operand 11 states and 231 transitions. [2024-06-14 13:53:42,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 220 transitions, 2506 flow [2024-06-14 13:53:42,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 220 transitions, 2465 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:42,460 INFO L231 Difference]: Finished difference. Result has 173 places, 191 transitions, 2038 flow [2024-06-14 13:53:42,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2038, PETRI_PLACES=173, PETRI_TRANSITIONS=191} [2024-06-14 13:53:42,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 13:53:42,460 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 191 transitions, 2038 flow [2024-06-14 13:53:42,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:42,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:42,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:42,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:53:42,461 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:42,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1442081884, now seen corresponding path program 5 times [2024-06-14 13:53:42,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:42,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885845192] [2024-06-14 13:53:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:42,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:42,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:42,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:42,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885845192] [2024-06-14 13:53:42,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885845192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:42,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:42,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:42,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238244417] [2024-06-14 13:53:42,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:42,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:42,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:42,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:42,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:42,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:42,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 191 transitions, 2038 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:42,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:42,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:42,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:43,058 INFO L124 PetriNetUnfolderBase]: 1301/2193 cut-off events. [2024-06-14 13:53:43,058 INFO L125 PetriNetUnfolderBase]: For 50348/50352 co-relation queries the response was YES. [2024-06-14 13:53:43,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12803 conditions, 2193 events. 1301/2193 cut-off events. For 50348/50352 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12135 event pairs, 312 based on Foata normal form. 5/2198 useless extension candidates. Maximal degree in co-relation 12721. Up to 1920 conditions per place. [2024-06-14 13:53:43,074 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 153 selfloop transitions, 60 changer transitions 0/219 dead transitions. [2024-06-14 13:53:43,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 219 transitions, 2735 flow [2024-06-14 13:53:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 13:53:43,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-14 13:53:43,075 INFO L175 Difference]: Start difference. First operand has 173 places, 191 transitions, 2038 flow. Second operand 9 states and 190 transitions. [2024-06-14 13:53:43,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 219 transitions, 2735 flow [2024-06-14 13:53:43,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 219 transitions, 2593 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:43,164 INFO L231 Difference]: Finished difference. Result has 175 places, 197 transitions, 2106 flow [2024-06-14 13:53:43,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1908, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2106, PETRI_PLACES=175, PETRI_TRANSITIONS=197} [2024-06-14 13:53:43,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-14 13:53:43,164 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 197 transitions, 2106 flow [2024-06-14 13:53:43,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:43,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:43,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:43,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:53:43,165 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:43,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:43,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1230864214, now seen corresponding path program 6 times [2024-06-14 13:53:43,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:43,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296299322] [2024-06-14 13:53:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:43,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:43,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:43,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:43,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296299322] [2024-06-14 13:53:43,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296299322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:43,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:43,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:43,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389220044] [2024-06-14 13:53:43,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:43,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:43,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:43,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:43,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:43,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:43,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 197 transitions, 2106 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:43,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:43,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:43,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:43,840 INFO L124 PetriNetUnfolderBase]: 1298/2184 cut-off events. [2024-06-14 13:53:43,840 INFO L125 PetriNetUnfolderBase]: For 51064/51064 co-relation queries the response was YES. [2024-06-14 13:53:43,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12688 conditions, 2184 events. 1298/2184 cut-off events. For 51064/51064 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12018 event pairs, 303 based on Foata normal form. 1/2185 useless extension candidates. Maximal degree in co-relation 12606. Up to 1917 conditions per place. [2024-06-14 13:53:43,854 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 156 selfloop transitions, 62 changer transitions 0/224 dead transitions. [2024-06-14 13:53:43,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 224 transitions, 2681 flow [2024-06-14 13:53:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:43,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 13:53:43,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 13:53:43,856 INFO L175 Difference]: Start difference. First operand has 175 places, 197 transitions, 2106 flow. Second operand 9 states and 197 transitions. [2024-06-14 13:53:43,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 224 transitions, 2681 flow [2024-06-14 13:53:43,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 224 transitions, 2562 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:43,937 INFO L231 Difference]: Finished difference. Result has 180 places, 197 transitions, 2121 flow [2024-06-14 13:53:43,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2121, PETRI_PLACES=180, PETRI_TRANSITIONS=197} [2024-06-14 13:53:43,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-14 13:53:43,938 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 197 transitions, 2121 flow [2024-06-14 13:53:43,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:43,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:43,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:43,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:53:43,938 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:43,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1441932154, now seen corresponding path program 7 times [2024-06-14 13:53:43,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:43,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610331172] [2024-06-14 13:53:43,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:43,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:44,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:44,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610331172] [2024-06-14 13:53:44,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610331172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:44,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:44,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:44,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836585419] [2024-06-14 13:53:44,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:44,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:44,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:44,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:44,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:44,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:44,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 197 transitions, 2121 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:44,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:44,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:44,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:44,547 INFO L124 PetriNetUnfolderBase]: 1295/2185 cut-off events. [2024-06-14 13:53:44,547 INFO L125 PetriNetUnfolderBase]: For 53806/53810 co-relation queries the response was YES. [2024-06-14 13:53:44,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12700 conditions, 2185 events. 1295/2185 cut-off events. For 53806/53810 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 12056 event pairs, 312 based on Foata normal form. 5/2190 useless extension candidates. Maximal degree in co-relation 12617. Up to 1914 conditions per place. [2024-06-14 13:53:44,564 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 152 selfloop transitions, 58 changer transitions 0/216 dead transitions. [2024-06-14 13:53:44,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 216 transitions, 2594 flow [2024-06-14 13:53:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:44,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 13:53:44,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:53:44,565 INFO L175 Difference]: Start difference. First operand has 180 places, 197 transitions, 2121 flow. Second operand 8 states and 172 transitions. [2024-06-14 13:53:44,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 216 transitions, 2594 flow [2024-06-14 13:53:44,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 216 transitions, 2459 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:44,659 INFO L231 Difference]: Finished difference. Result has 180 places, 197 transitions, 2108 flow [2024-06-14 13:53:44,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2108, PETRI_PLACES=180, PETRI_TRANSITIONS=197} [2024-06-14 13:53:44,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-14 13:53:44,659 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 197 transitions, 2108 flow [2024-06-14 13:53:44,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:44,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:44,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:44,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:53:44,660 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:44,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:44,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1008668056, now seen corresponding path program 2 times [2024-06-14 13:53:44,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:44,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115270312] [2024-06-14 13:53:44,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:44,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:44,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:44,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115270312] [2024-06-14 13:53:44,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115270312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:44,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:44,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:44,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326474033] [2024-06-14 13:53:44,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:44,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:44,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:44,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:44,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:45,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:45,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 197 transitions, 2108 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:45,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:45,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:45,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:45,368 INFO L124 PetriNetUnfolderBase]: 1276/2175 cut-off events. [2024-06-14 13:53:45,368 INFO L125 PetriNetUnfolderBase]: For 58281/58283 co-relation queries the response was YES. [2024-06-14 13:53:45,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12619 conditions, 2175 events. 1276/2175 cut-off events. For 58281/58283 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12231 event pairs, 305 based on Foata normal form. 9/2175 useless extension candidates. Maximal degree in co-relation 12537. Up to 1843 conditions per place. [2024-06-14 13:53:45,386 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 168 selfloop transitions, 27 changer transitions 0/221 dead transitions. [2024-06-14 13:53:45,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 221 transitions, 2597 flow [2024-06-14 13:53:45,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:45,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:45,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 13:53:45,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:53:45,389 INFO L175 Difference]: Start difference. First operand has 180 places, 197 transitions, 2108 flow. Second operand 8 states and 176 transitions. [2024-06-14 13:53:45,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 221 transitions, 2597 flow [2024-06-14 13:53:45,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 221 transitions, 2473 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:45,489 INFO L231 Difference]: Finished difference. Result has 183 places, 198 transitions, 2060 flow [2024-06-14 13:53:45,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2060, PETRI_PLACES=183, PETRI_TRANSITIONS=198} [2024-06-14 13:53:45,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 13:53:45,490 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 198 transitions, 2060 flow [2024-06-14 13:53:45,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:45,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:45,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:45,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:53:45,490 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:45,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:45,491 INFO L85 PathProgramCache]: Analyzing trace with hash -994383256, now seen corresponding path program 3 times [2024-06-14 13:53:45,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:45,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073786345] [2024-06-14 13:53:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:45,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:45,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:45,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073786345] [2024-06-14 13:53:45,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073786345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:45,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:45,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:45,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311478307] [2024-06-14 13:53:45,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:45,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:45,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:45,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:45,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:45,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 198 transitions, 2060 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:45,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:45,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:45,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:46,183 INFO L124 PetriNetUnfolderBase]: 1284/2187 cut-off events. [2024-06-14 13:53:46,183 INFO L125 PetriNetUnfolderBase]: For 57832/57832 co-relation queries the response was YES. [2024-06-14 13:53:46,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12541 conditions, 2187 events. 1284/2187 cut-off events. For 57832/57832 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12260 event pairs, 299 based on Foata normal form. 8/2188 useless extension candidates. Maximal degree in co-relation 12459. Up to 1787 conditions per place. [2024-06-14 13:53:46,199 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 168 selfloop transitions, 31 changer transitions 0/225 dead transitions. [2024-06-14 13:53:46,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 225 transitions, 2579 flow [2024-06-14 13:53:46,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:53:46,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:53:46,200 INFO L175 Difference]: Start difference. First operand has 183 places, 198 transitions, 2060 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:53:46,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 225 transitions, 2579 flow [2024-06-14 13:53:46,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 225 transitions, 2523 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:46,293 INFO L231 Difference]: Finished difference. Result has 185 places, 199 transitions, 2088 flow [2024-06-14 13:53:46,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2088, PETRI_PLACES=185, PETRI_TRANSITIONS=199} [2024-06-14 13:53:46,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-14 13:53:46,294 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 199 transitions, 2088 flow [2024-06-14 13:53:46,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:46,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:46,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:46,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:53:46,294 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:46,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:46,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1479793488, now seen corresponding path program 1 times [2024-06-14 13:53:46,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:46,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859009756] [2024-06-14 13:53:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:46,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:46,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859009756] [2024-06-14 13:53:46,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859009756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:46,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:46,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:46,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811088995] [2024-06-14 13:53:46,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:46,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:46,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:46,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:46,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:46,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:46,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 199 transitions, 2088 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:46,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:46,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:46,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:46,915 INFO L124 PetriNetUnfolderBase]: 1308/2220 cut-off events. [2024-06-14 13:53:46,915 INFO L125 PetriNetUnfolderBase]: For 59200/59200 co-relation queries the response was YES. [2024-06-14 13:53:46,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12773 conditions, 2220 events. 1308/2220 cut-off events. For 59200/59200 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12474 event pairs, 271 based on Foata normal form. 4/2219 useless extension candidates. Maximal degree in co-relation 12690. Up to 1832 conditions per place. [2024-06-14 13:53:46,932 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 156 selfloop transitions, 46 changer transitions 0/226 dead transitions. [2024-06-14 13:53:46,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 226 transitions, 2672 flow [2024-06-14 13:53:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:46,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:46,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:53:46,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 13:53:46,933 INFO L175 Difference]: Start difference. First operand has 185 places, 199 transitions, 2088 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:53:46,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 226 transitions, 2672 flow [2024-06-14 13:53:47,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 226 transitions, 2604 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:47,043 INFO L231 Difference]: Finished difference. Result has 186 places, 203 transitions, 2173 flow [2024-06-14 13:53:47,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2173, PETRI_PLACES=186, PETRI_TRANSITIONS=203} [2024-06-14 13:53:47,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-14 13:53:47,043 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 203 transitions, 2173 flow [2024-06-14 13:53:47,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:47,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:47,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:53:47,043 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:47,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:47,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1482650448, now seen corresponding path program 2 times [2024-06-14 13:53:47,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:47,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350906684] [2024-06-14 13:53:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:47,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:47,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:47,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350906684] [2024-06-14 13:53:47,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350906684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:47,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:47,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:47,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021457683] [2024-06-14 13:53:47,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:47,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:47,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:47,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:47,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:47,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 203 transitions, 2173 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:47,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:47,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:47,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:47,651 INFO L124 PetriNetUnfolderBase]: 1322/2238 cut-off events. [2024-06-14 13:53:47,651 INFO L125 PetriNetUnfolderBase]: For 62466/62466 co-relation queries the response was YES. [2024-06-14 13:53:47,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 2238 events. 1322/2238 cut-off events. For 62466/62466 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12596 event pairs, 306 based on Foata normal form. 4/2237 useless extension candidates. Maximal degree in co-relation 12946. Up to 1918 conditions per place. [2024-06-14 13:53:47,666 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 155 selfloop transitions, 44 changer transitions 0/223 dead transitions. [2024-06-14 13:53:47,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 223 transitions, 2645 flow [2024-06-14 13:53:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:53:47,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 13:53:47,667 INFO L175 Difference]: Start difference. First operand has 186 places, 203 transitions, 2173 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:53:47,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 223 transitions, 2645 flow [2024-06-14 13:53:47,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 223 transitions, 2557 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:47,801 INFO L231 Difference]: Finished difference. Result has 190 places, 205 transitions, 2213 flow [2024-06-14 13:53:47,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2213, PETRI_PLACES=190, PETRI_TRANSITIONS=205} [2024-06-14 13:53:47,802 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-14 13:53:47,802 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 205 transitions, 2213 flow [2024-06-14 13:53:47,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:47,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:47,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:47,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:53:47,803 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:47,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:47,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1597941618, now seen corresponding path program 3 times [2024-06-14 13:53:47,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:47,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336567459] [2024-06-14 13:53:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:47,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:48,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:48,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336567459] [2024-06-14 13:53:48,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336567459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:48,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:48,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:48,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566817010] [2024-06-14 13:53:48,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:48,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:48,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:48,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:48,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:48,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:48,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 205 transitions, 2213 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:48,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:48,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:48,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:48,410 INFO L124 PetriNetUnfolderBase]: 1336/2260 cut-off events. [2024-06-14 13:53:48,410 INFO L125 PetriNetUnfolderBase]: For 65831/65831 co-relation queries the response was YES. [2024-06-14 13:53:48,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13218 conditions, 2260 events. 1336/2260 cut-off events. For 65831/65831 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 12758 event pairs, 306 based on Foata normal form. 4/2259 useless extension candidates. Maximal degree in co-relation 13132. Up to 1968 conditions per place. [2024-06-14 13:53:48,430 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 167 selfloop transitions, 31 changer transitions 0/222 dead transitions. [2024-06-14 13:53:48,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 222 transitions, 2671 flow [2024-06-14 13:53:48,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:48,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:48,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 13:53:48,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-14 13:53:48,431 INFO L175 Difference]: Start difference. First operand has 190 places, 205 transitions, 2213 flow. Second operand 7 states and 153 transitions. [2024-06-14 13:53:48,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 222 transitions, 2671 flow [2024-06-14 13:53:48,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 222 transitions, 2573 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:48,549 INFO L231 Difference]: Finished difference. Result has 192 places, 207 transitions, 2213 flow [2024-06-14 13:53:48,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2115, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2213, PETRI_PLACES=192, PETRI_TRANSITIONS=207} [2024-06-14 13:53:48,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-14 13:53:48,550 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 207 transitions, 2213 flow [2024-06-14 13:53:48,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:48,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:48,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:48,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:53:48,550 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:48,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126316, now seen corresponding path program 1 times [2024-06-14 13:53:48,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:48,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375975769] [2024-06-14 13:53:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:48,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:48,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:48,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375975769] [2024-06-14 13:53:48,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375975769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:48,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:48,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:48,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140233662] [2024-06-14 13:53:48,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:48,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:48,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:48,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:48,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:48,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:48,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 207 transitions, 2213 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:48,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:48,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:48,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:49,163 INFO L124 PetriNetUnfolderBase]: 1389/2330 cut-off events. [2024-06-14 13:53:49,163 INFO L125 PetriNetUnfolderBase]: For 67132/67132 co-relation queries the response was YES. [2024-06-14 13:53:49,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13649 conditions, 2330 events. 1389/2330 cut-off events. For 67132/67132 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 13039 event pairs, 309 based on Foata normal form. 2/2332 useless extension candidates. Maximal degree in co-relation 13562. Up to 2125 conditions per place. [2024-06-14 13:53:49,182 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 194 selfloop transitions, 25 changer transitions 0/225 dead transitions. [2024-06-14 13:53:49,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 225 transitions, 2718 flow [2024-06-14 13:53:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:49,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:49,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-14 13:53:49,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-14 13:53:49,183 INFO L175 Difference]: Start difference. First operand has 192 places, 207 transitions, 2213 flow. Second operand 7 states and 149 transitions. [2024-06-14 13:53:49,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 225 transitions, 2718 flow [2024-06-14 13:53:49,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 225 transitions, 2642 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:49,326 INFO L231 Difference]: Finished difference. Result has 194 places, 209 transitions, 2218 flow [2024-06-14 13:53:49,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2218, PETRI_PLACES=194, PETRI_TRANSITIONS=209} [2024-06-14 13:53:49,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-14 13:53:49,327 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 209 transitions, 2218 flow [2024-06-14 13:53:49,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:49,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:49,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:49,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:53:49,327 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:49,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:49,328 INFO L85 PathProgramCache]: Analyzing trace with hash -376916670, now seen corresponding path program 4 times [2024-06-14 13:53:49,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:49,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193258751] [2024-06-14 13:53:49,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:49,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:49,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:49,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193258751] [2024-06-14 13:53:49,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193258751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:49,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:49,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:49,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278173182] [2024-06-14 13:53:49,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:49,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:49,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:49,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:53:49,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 209 transitions, 2218 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:49,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:49,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:53:49,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:49,986 INFO L124 PetriNetUnfolderBase]: 1332/2256 cut-off events. [2024-06-14 13:53:49,986 INFO L125 PetriNetUnfolderBase]: For 68421/68421 co-relation queries the response was YES. [2024-06-14 13:53:49,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13126 conditions, 2256 events. 1332/2256 cut-off events. For 68421/68421 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12722 event pairs, 267 based on Foata normal form. 4/2255 useless extension candidates. Maximal degree in co-relation 13038. Up to 1892 conditions per place. [2024-06-14 13:53:50,005 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 161 selfloop transitions, 43 changer transitions 0/229 dead transitions. [2024-06-14 13:53:50,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 229 transitions, 2676 flow [2024-06-14 13:53:50,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 13:53:50,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 13:53:50,006 INFO L175 Difference]: Start difference. First operand has 194 places, 209 transitions, 2218 flow. Second operand 6 states and 143 transitions. [2024-06-14 13:53:50,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 229 transitions, 2676 flow [2024-06-14 13:53:50,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 229 transitions, 2599 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:50,167 INFO L231 Difference]: Finished difference. Result has 195 places, 209 transitions, 2241 flow [2024-06-14 13:53:50,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2241, PETRI_PLACES=195, PETRI_TRANSITIONS=209} [2024-06-14 13:53:50,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-14 13:53:50,167 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 209 transitions, 2241 flow [2024-06-14 13:53:50,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:50,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:50,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:50,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:53:50,167 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:50,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:50,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1230849334, now seen corresponding path program 2 times [2024-06-14 13:53:50,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:50,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124445249] [2024-06-14 13:53:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:50,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:50,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:50,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124445249] [2024-06-14 13:53:50,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124445249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:50,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:50,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:50,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024379833] [2024-06-14 13:53:50,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:50,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:50,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:50,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:50,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:50,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:50,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 209 transitions, 2241 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:50,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:50,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:50,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:50,739 INFO L124 PetriNetUnfolderBase]: 1387/2328 cut-off events. [2024-06-14 13:53:50,739 INFO L125 PetriNetUnfolderBase]: For 70332/70332 co-relation queries the response was YES. [2024-06-14 13:53:50,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13697 conditions, 2328 events. 1387/2328 cut-off events. For 70332/70332 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 13013 event pairs, 307 based on Foata normal form. 2/2330 useless extension candidates. Maximal degree in co-relation 13608. Up to 2117 conditions per place. [2024-06-14 13:53:50,758 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 193 selfloop transitions, 27 changer transitions 0/226 dead transitions. [2024-06-14 13:53:50,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 226 transitions, 2750 flow [2024-06-14 13:53:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 13:53:50,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:53:50,759 INFO L175 Difference]: Start difference. First operand has 195 places, 209 transitions, 2241 flow. Second operand 6 states and 132 transitions. [2024-06-14 13:53:50,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 226 transitions, 2750 flow [2024-06-14 13:53:50,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 226 transitions, 2654 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:50,902 INFO L231 Difference]: Finished difference. Result has 196 places, 211 transitions, 2237 flow [2024-06-14 13:53:50,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2237, PETRI_PLACES=196, PETRI_TRANSITIONS=211} [2024-06-14 13:53:50,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-14 13:53:50,903 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 211 transitions, 2237 flow [2024-06-14 13:53:50,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:50,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:50,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:50,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:53:50,903 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:50,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1002948184, now seen corresponding path program 3 times [2024-06-14 13:53:50,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:50,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740575629] [2024-06-14 13:53:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:50,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:51,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:51,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740575629] [2024-06-14 13:53:51,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740575629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:51,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:51,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:51,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161553726] [2024-06-14 13:53:51,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:51,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:51,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:51,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:51,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 211 transitions, 2237 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:51,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:51,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:51,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:51,521 INFO L124 PetriNetUnfolderBase]: 1395/2341 cut-off events. [2024-06-14 13:53:51,521 INFO L125 PetriNetUnfolderBase]: For 71218/71222 co-relation queries the response was YES. [2024-06-14 13:53:51,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13805 conditions, 2341 events. 1395/2341 cut-off events. For 71218/71222 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13135 event pairs, 314 based on Foata normal form. 6/2347 useless extension candidates. Maximal degree in co-relation 13715. Up to 2135 conditions per place. [2024-06-14 13:53:51,539 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 195 selfloop transitions, 24 changer transitions 0/225 dead transitions. [2024-06-14 13:53:51,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 225 transitions, 2740 flow [2024-06-14 13:53:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 13:53:51,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:53:51,540 INFO L175 Difference]: Start difference. First operand has 196 places, 211 transitions, 2237 flow. Second operand 6 states and 128 transitions. [2024-06-14 13:53:51,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 225 transitions, 2740 flow [2024-06-14 13:53:51,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 225 transitions, 2664 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:51,669 INFO L231 Difference]: Finished difference. Result has 198 places, 213 transitions, 2248 flow [2024-06-14 13:53:51,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2248, PETRI_PLACES=198, PETRI_TRANSITIONS=213} [2024-06-14 13:53:51,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-14 13:53:51,669 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 213 transitions, 2248 flow [2024-06-14 13:53:51,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:51,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:51,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:51,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:53:51,670 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:51,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:51,670 INFO L85 PathProgramCache]: Analyzing trace with hash -994377304, now seen corresponding path program 4 times [2024-06-14 13:53:51,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:51,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93761829] [2024-06-14 13:53:51,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:51,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:51,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:51,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93761829] [2024-06-14 13:53:51,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93761829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:51,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:51,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:51,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345267079] [2024-06-14 13:53:51,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:51,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:51,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:51,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:51,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:51,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:51,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 213 transitions, 2248 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:51,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:51,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:51,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:52,249 INFO L124 PetriNetUnfolderBase]: 1390/2334 cut-off events. [2024-06-14 13:53:52,249 INFO L125 PetriNetUnfolderBase]: For 69252/69256 co-relation queries the response was YES. [2024-06-14 13:53:52,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13639 conditions, 2334 events. 1390/2334 cut-off events. For 69252/69256 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13073 event pairs, 303 based on Foata normal form. 6/2340 useless extension candidates. Maximal degree in co-relation 13548. Up to 2102 conditions per place. [2024-06-14 13:53:52,269 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 191 selfloop transitions, 31 changer transitions 0/228 dead transitions. [2024-06-14 13:53:52,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 228 transitions, 2759 flow [2024-06-14 13:53:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:52,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:52,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-14 13:53:52,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:53:52,270 INFO L175 Difference]: Start difference. First operand has 198 places, 213 transitions, 2248 flow. Second operand 6 states and 129 transitions. [2024-06-14 13:53:52,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 228 transitions, 2759 flow [2024-06-14 13:53:52,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 228 transitions, 2692 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:52,428 INFO L231 Difference]: Finished difference. Result has 200 places, 215 transitions, 2282 flow [2024-06-14 13:53:52,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2181, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2282, PETRI_PLACES=200, PETRI_TRANSITIONS=215} [2024-06-14 13:53:52,429 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-14 13:53:52,429 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 215 transitions, 2282 flow [2024-06-14 13:53:52,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:52,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:52,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:52,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:53:52,430 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:52,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:52,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2104420354, now seen corresponding path program 1 times [2024-06-14 13:53:52,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:52,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265558636] [2024-06-14 13:53:52,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:52,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:52,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:52,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:52,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265558636] [2024-06-14 13:53:52,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265558636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:52,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:52,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:53:52,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357380904] [2024-06-14 13:53:52,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:52,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:53:52,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:53:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:53:52,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:52,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 215 transitions, 2282 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:52,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:52,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:52,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:53,214 INFO L124 PetriNetUnfolderBase]: 1418/2380 cut-off events. [2024-06-14 13:53:53,215 INFO L125 PetriNetUnfolderBase]: For 76080/76080 co-relation queries the response was YES. [2024-06-14 13:53:53,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14015 conditions, 2380 events. 1418/2380 cut-off events. For 76080/76080 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13381 event pairs, 246 based on Foata normal form. 6/2385 useless extension candidates. Maximal degree in co-relation 13923. Up to 2001 conditions per place. [2024-06-14 13:53:53,237 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 30 changer transitions 0/242 dead transitions. [2024-06-14 13:53:53,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 242 transitions, 2967 flow [2024-06-14 13:53:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 13:53:53,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-14 13:53:53,238 INFO L175 Difference]: Start difference. First operand has 200 places, 215 transitions, 2282 flow. Second operand 7 states and 158 transitions. [2024-06-14 13:53:53,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 242 transitions, 2967 flow [2024-06-14 13:53:53,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 242 transitions, 2872 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:53,383 INFO L231 Difference]: Finished difference. Result has 203 places, 218 transitions, 2287 flow [2024-06-14 13:53:53,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2287, PETRI_PLACES=203, PETRI_TRANSITIONS=218} [2024-06-14 13:53:53,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-14 13:53:53,384 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 218 transitions, 2287 flow [2024-06-14 13:53:53,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:53,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:53,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:53,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:53:53,384 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:53,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:53,385 INFO L85 PathProgramCache]: Analyzing trace with hash -945087486, now seen corresponding path program 2 times [2024-06-14 13:53:53,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:53,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141258577] [2024-06-14 13:53:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:53,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:53,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141258577] [2024-06-14 13:53:53,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141258577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:53,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:53,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:53,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360681202] [2024-06-14 13:53:53,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:53,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:53,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:53,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:53,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:53,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:53,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 218 transitions, 2287 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:53,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:53,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:53,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:54,060 INFO L124 PetriNetUnfolderBase]: 1405/2361 cut-off events. [2024-06-14 13:53:54,060 INFO L125 PetriNetUnfolderBase]: For 73838/73838 co-relation queries the response was YES. [2024-06-14 13:53:54,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13743 conditions, 2361 events. 1405/2361 cut-off events. For 73838/73838 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13230 event pairs, 235 based on Foata normal form. 6/2366 useless extension candidates. Maximal degree in co-relation 13650. Up to 1995 conditions per place. [2024-06-14 13:53:54,080 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 203 selfloop transitions, 30 changer transitions 0/239 dead transitions. [2024-06-14 13:53:54,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 239 transitions, 2845 flow [2024-06-14 13:53:54,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:54,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 13:53:54,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:53:54,081 INFO L175 Difference]: Start difference. First operand has 203 places, 218 transitions, 2287 flow. Second operand 6 states and 140 transitions. [2024-06-14 13:53:54,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 239 transitions, 2845 flow [2024-06-14 13:53:54,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 239 transitions, 2764 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:54,224 INFO L231 Difference]: Finished difference. Result has 205 places, 218 transitions, 2272 flow [2024-06-14 13:53:54,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2206, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2272, PETRI_PLACES=205, PETRI_TRANSITIONS=218} [2024-06-14 13:53:54,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-14 13:53:54,225 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 218 transitions, 2272 flow [2024-06-14 13:53:54,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:54,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:54,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:54,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:53:54,225 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:54,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:54,226 INFO L85 PathProgramCache]: Analyzing trace with hash 130452904, now seen corresponding path program 1 times [2024-06-14 13:53:54,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:54,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833661155] [2024-06-14 13:53:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:54,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:54,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:54,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833661155] [2024-06-14 13:53:54,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833661155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:54,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:54,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:54,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309371079] [2024-06-14 13:53:54,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:54,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:54,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:54,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:54,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:54,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:54,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 218 transitions, 2272 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:54,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:54,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:54,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:54,838 INFO L124 PetriNetUnfolderBase]: 1418/2381 cut-off events. [2024-06-14 13:53:54,839 INFO L125 PetriNetUnfolderBase]: For 72995/72995 co-relation queries the response was YES. [2024-06-14 13:53:54,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13845 conditions, 2381 events. 1418/2381 cut-off events. For 72995/72995 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 13395 event pairs, 323 based on Foata normal form. 1/2381 useless extension candidates. Maximal degree in co-relation 13752. Up to 2048 conditions per place. [2024-06-14 13:53:54,859 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 59 changer transitions 0/241 dead transitions. [2024-06-14 13:53:54,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 241 transitions, 2964 flow [2024-06-14 13:53:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:54,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:54,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 13:53:54,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 13:53:54,860 INFO L175 Difference]: Start difference. First operand has 205 places, 218 transitions, 2272 flow. Second operand 6 states and 143 transitions. [2024-06-14 13:53:54,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 241 transitions, 2964 flow [2024-06-14 13:53:54,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 241 transitions, 2894 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:54,994 INFO L231 Difference]: Finished difference. Result has 206 places, 224 transitions, 2433 flow [2024-06-14 13:53:54,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2433, PETRI_PLACES=206, PETRI_TRANSITIONS=224} [2024-06-14 13:53:54,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-14 13:53:54,995 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 224 transitions, 2433 flow [2024-06-14 13:53:54,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:54,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:54,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:54,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:53:54,995 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:54,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:54,995 INFO L85 PathProgramCache]: Analyzing trace with hash -437784058, now seen corresponding path program 1 times [2024-06-14 13:53:54,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:54,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147546446] [2024-06-14 13:53:54,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:54,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:55,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:55,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147546446] [2024-06-14 13:53:55,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147546446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:55,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:55,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:55,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842086473] [2024-06-14 13:53:55,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:55,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:55,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:55,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:55,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:55,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 224 transitions, 2433 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:55,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:55,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:55,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:55,693 INFO L124 PetriNetUnfolderBase]: 1467/2458 cut-off events. [2024-06-14 13:53:55,694 INFO L125 PetriNetUnfolderBase]: For 75798/75798 co-relation queries the response was YES. [2024-06-14 13:53:55,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14658 conditions, 2458 events. 1467/2458 cut-off events. For 75798/75798 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 13881 event pairs, 322 based on Foata normal form. 1/2458 useless extension candidates. Maximal degree in co-relation 14565. Up to 2150 conditions per place. [2024-06-14 13:53:55,716 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 190 selfloop transitions, 67 changer transitions 0/263 dead transitions. [2024-06-14 13:53:55,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 263 transitions, 3417 flow [2024-06-14 13:53:55,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:55,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:55,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:53:55,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 13:53:55,717 INFO L175 Difference]: Start difference. First operand has 206 places, 224 transitions, 2433 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:53:55,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 263 transitions, 3417 flow [2024-06-14 13:53:55,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 263 transitions, 3325 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:55,909 INFO L231 Difference]: Finished difference. Result has 212 places, 247 transitions, 2906 flow [2024-06-14 13:53:55,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2906, PETRI_PLACES=212, PETRI_TRANSITIONS=247} [2024-06-14 13:53:55,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-14 13:53:55,909 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 247 transitions, 2906 flow [2024-06-14 13:53:55,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:55,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:55,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:55,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:53:55,910 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:55,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:55,910 INFO L85 PathProgramCache]: Analyzing trace with hash -437784244, now seen corresponding path program 2 times [2024-06-14 13:53:55,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:55,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537761755] [2024-06-14 13:53:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:55,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:56,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:56,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:56,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537761755] [2024-06-14 13:53:56,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537761755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:56,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:56,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:56,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799785306] [2024-06-14 13:53:56,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:56,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:56,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:56,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:56,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:56,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:56,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 247 transitions, 2906 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:56,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:56,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:56,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:56,604 INFO L124 PetriNetUnfolderBase]: 1472/2467 cut-off events. [2024-06-14 13:53:56,605 INFO L125 PetriNetUnfolderBase]: For 77454/77454 co-relation queries the response was YES. [2024-06-14 13:53:56,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15175 conditions, 2467 events. 1472/2467 cut-off events. For 77454/77454 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 13946 event pairs, 322 based on Foata normal form. 1/2467 useless extension candidates. Maximal degree in co-relation 15079. Up to 2165 conditions per place. [2024-06-14 13:53:56,627 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 52 changer transitions 0/263 dead transitions. [2024-06-14 13:53:56,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 263 transitions, 3502 flow [2024-06-14 13:53:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:56,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 13:53:56,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:53:56,628 INFO L175 Difference]: Start difference. First operand has 212 places, 247 transitions, 2906 flow. Second operand 6 states and 138 transitions. [2024-06-14 13:53:56,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 263 transitions, 3502 flow [2024-06-14 13:53:56,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 263 transitions, 3441 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:56,815 INFO L231 Difference]: Finished difference. Result has 216 places, 250 transitions, 3019 flow [2024-06-14 13:53:56,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3019, PETRI_PLACES=216, PETRI_TRANSITIONS=250} [2024-06-14 13:53:56,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-14 13:53:56,815 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 250 transitions, 3019 flow [2024-06-14 13:53:56,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:56,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:56,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:56,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:53:56,815 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:56,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash -944995230, now seen corresponding path program 2 times [2024-06-14 13:53:56,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:56,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276641492] [2024-06-14 13:53:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:56,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:56,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:57,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:57,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276641492] [2024-06-14 13:53:57,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276641492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:57,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:57,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:57,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300982034] [2024-06-14 13:53:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:57,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:57,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:57,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:57,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 250 transitions, 3019 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:57,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:57,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:57,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:57,529 INFO L124 PetriNetUnfolderBase]: 1477/2474 cut-off events. [2024-06-14 13:53:57,529 INFO L125 PetriNetUnfolderBase]: For 80731/80731 co-relation queries the response was YES. [2024-06-14 13:53:57,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15434 conditions, 2474 events. 1477/2474 cut-off events. For 80731/80731 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13998 event pairs, 322 based on Foata normal form. 1/2474 useless extension candidates. Maximal degree in co-relation 15336. Up to 2163 conditions per place. [2024-06-14 13:53:57,552 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 70 changer transitions 0/268 dead transitions. [2024-06-14 13:53:57,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 268 transitions, 3745 flow [2024-06-14 13:53:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:57,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 13:53:57,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:53:57,554 INFO L175 Difference]: Start difference. First operand has 216 places, 250 transitions, 3019 flow. Second operand 6 states and 140 transitions. [2024-06-14 13:53:57,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 268 transitions, 3745 flow [2024-06-14 13:53:57,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 268 transitions, 3612 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:57,775 INFO L231 Difference]: Finished difference. Result has 219 places, 254 transitions, 3173 flow [2024-06-14 13:53:57,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3173, PETRI_PLACES=219, PETRI_TRANSITIONS=254} [2024-06-14 13:53:57,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 13:53:57,776 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 254 transitions, 3173 flow [2024-06-14 13:53:57,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:57,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:57,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:57,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:53:57,777 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:57,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:57,777 INFO L85 PathProgramCache]: Analyzing trace with hash 911921036, now seen corresponding path program 3 times [2024-06-14 13:53:57,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:57,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592426972] [2024-06-14 13:53:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:57,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:58,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:58,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592426972] [2024-06-14 13:53:58,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592426972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:58,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:58,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236003944] [2024-06-14 13:53:58,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:58,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:58,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:58,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:58,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:58,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 254 transitions, 3173 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:58,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:58,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:58,474 INFO L124 PetriNetUnfolderBase]: 1474/2470 cut-off events. [2024-06-14 13:53:58,475 INFO L125 PetriNetUnfolderBase]: For 82732/82732 co-relation queries the response was YES. [2024-06-14 13:53:58,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15560 conditions, 2470 events. 1474/2470 cut-off events. For 82732/82732 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13963 event pairs, 322 based on Foata normal form. 1/2470 useless extension candidates. Maximal degree in co-relation 15460. Up to 2118 conditions per place. [2024-06-14 13:53:58,499 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 65 changer transitions 0/269 dead transitions. [2024-06-14 13:53:58,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 269 transitions, 3737 flow [2024-06-14 13:53:58,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:53:58,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:53:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 13:53:58,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 13:53:58,500 INFO L175 Difference]: Start difference. First operand has 219 places, 254 transitions, 3173 flow. Second operand 5 states and 123 transitions. [2024-06-14 13:53:58,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 269 transitions, 3737 flow [2024-06-14 13:53:58,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 269 transitions, 3608 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:58,753 INFO L231 Difference]: Finished difference. Result has 221 places, 254 transitions, 3212 flow [2024-06-14 13:53:58,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3044, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3212, PETRI_PLACES=221, PETRI_TRANSITIONS=254} [2024-06-14 13:53:58,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 13:53:58,753 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 254 transitions, 3212 flow [2024-06-14 13:53:58,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:58,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:58,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:53:58,754 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:58,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:58,754 INFO L85 PathProgramCache]: Analyzing trace with hash -944758080, now seen corresponding path program 3 times [2024-06-14 13:53:58,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:58,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369601464] [2024-06-14 13:53:58,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:58,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:59,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:59,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369601464] [2024-06-14 13:53:59,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369601464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:59,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:59,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844817575] [2024-06-14 13:53:59,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:59,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:59,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:59,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:59,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:59,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 254 transitions, 3212 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:59,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:59,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:59,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:59,427 INFO L124 PetriNetUnfolderBase]: 1471/2466 cut-off events. [2024-06-14 13:53:59,427 INFO L125 PetriNetUnfolderBase]: For 85024/85024 co-relation queries the response was YES. [2024-06-14 13:53:59,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15591 conditions, 2466 events. 1471/2466 cut-off events. For 85024/85024 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 13967 event pairs, 322 based on Foata normal form. 1/2466 useless extension candidates. Maximal degree in co-relation 15490. Up to 2156 conditions per place. [2024-06-14 13:53:59,450 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 70 changer transitions 0/268 dead transitions. [2024-06-14 13:53:59,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 268 transitions, 3770 flow [2024-06-14 13:53:59,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:53:59,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 13:53:59,451 INFO L175 Difference]: Start difference. First operand has 221 places, 254 transitions, 3212 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:53:59,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 268 transitions, 3770 flow [2024-06-14 13:53:59,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 268 transitions, 3588 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:59,685 INFO L231 Difference]: Finished difference. Result has 223 places, 254 transitions, 3184 flow [2024-06-14 13:53:59,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3184, PETRI_PLACES=223, PETRI_TRANSITIONS=254} [2024-06-14 13:53:59,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 13:53:59,686 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 254 transitions, 3184 flow [2024-06-14 13:53:59,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:59,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:59,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:59,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:53:59,686 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:59,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:59,686 INFO L85 PathProgramCache]: Analyzing trace with hash -511646168, now seen corresponding path program 4 times [2024-06-14 13:53:59,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:59,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597812701] [2024-06-14 13:53:59,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:59,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:59,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:59,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597812701] [2024-06-14 13:53:59,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597812701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:59,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:59,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:59,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918189290] [2024-06-14 13:53:59,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:59,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:59,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:59,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:59,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:59,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 254 transitions, 3184 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:59,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:59,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:59,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:00,305 INFO L124 PetriNetUnfolderBase]: 1484/2494 cut-off events. [2024-06-14 13:54:00,306 INFO L125 PetriNetUnfolderBase]: For 83220/83220 co-relation queries the response was YES. [2024-06-14 13:54:00,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15688 conditions, 2494 events. 1484/2494 cut-off events. For 83220/83220 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14165 event pairs, 322 based on Foata normal form. 1/2494 useless extension candidates. Maximal degree in co-relation 15587. Up to 2061 conditions per place. [2024-06-14 13:54:00,329 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 202 selfloop transitions, 77 changer transitions 0/285 dead transitions. [2024-06-14 13:54:00,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 285 transitions, 4142 flow [2024-06-14 13:54:00,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:54:00,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:54:00,330 INFO L175 Difference]: Start difference. First operand has 223 places, 254 transitions, 3184 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:54:00,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 285 transitions, 4142 flow [2024-06-14 13:54:00,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 285 transitions, 3978 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:00,558 INFO L231 Difference]: Finished difference. Result has 224 places, 263 transitions, 3352 flow [2024-06-14 13:54:00,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3024, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3352, PETRI_PLACES=224, PETRI_TRANSITIONS=263} [2024-06-14 13:54:00,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 13:54:00,559 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 263 transitions, 3352 flow [2024-06-14 13:54:00,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:00,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:00,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:00,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:54:00,560 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:00,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:00,560 INFO L85 PathProgramCache]: Analyzing trace with hash 383998418, now seen corresponding path program 5 times [2024-06-14 13:54:00,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:00,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562068481] [2024-06-14 13:54:00,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:00,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:00,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:00,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562068481] [2024-06-14 13:54:00,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562068481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:00,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:00,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:00,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947618099] [2024-06-14 13:54:00,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:00,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:00,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:00,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:00,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:00,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:00,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 263 transitions, 3352 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:00,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:00,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:00,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:01,197 INFO L124 PetriNetUnfolderBase]: 1489/2503 cut-off events. [2024-06-14 13:54:01,197 INFO L125 PetriNetUnfolderBase]: For 85106/85106 co-relation queries the response was YES. [2024-06-14 13:54:01,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16010 conditions, 2503 events. 1489/2503 cut-off events. For 85106/85106 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14254 event pairs, 322 based on Foata normal form. 1/2503 useless extension candidates. Maximal degree in co-relation 15909. Up to 2067 conditions per place. [2024-06-14 13:54:01,221 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 86 changer transitions 0/288 dead transitions. [2024-06-14 13:54:01,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 288 transitions, 4214 flow [2024-06-14 13:54:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:54:01,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:54:01,222 INFO L175 Difference]: Start difference. First operand has 224 places, 263 transitions, 3352 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:54:01,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 288 transitions, 4214 flow [2024-06-14 13:54:01,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 288 transitions, 3990 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-14 13:54:01,519 INFO L231 Difference]: Finished difference. Result has 228 places, 266 transitions, 3366 flow [2024-06-14 13:54:01,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3146, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3366, PETRI_PLACES=228, PETRI_TRANSITIONS=266} [2024-06-14 13:54:01,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-14 13:54:01,519 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 266 transitions, 3366 flow [2024-06-14 13:54:01,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:01,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:01,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:01,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:54:01,520 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:01,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash 384296948, now seen corresponding path program 6 times [2024-06-14 13:54:01,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:01,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401945304] [2024-06-14 13:54:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:01,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:01,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:01,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401945304] [2024-06-14 13:54:01,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401945304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:01,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:01,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:01,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53432976] [2024-06-14 13:54:01,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:01,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:01,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:01,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:01,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:01,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:01,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 266 transitions, 3366 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:01,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:01,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:01,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:02,194 INFO L124 PetriNetUnfolderBase]: 1494/2512 cut-off events. [2024-06-14 13:54:02,195 INFO L125 PetriNetUnfolderBase]: For 86372/86372 co-relation queries the response was YES. [2024-06-14 13:54:02,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15880 conditions, 2512 events. 1494/2512 cut-off events. For 86372/86372 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14316 event pairs, 322 based on Foata normal form. 1/2512 useless extension candidates. Maximal degree in co-relation 15778. Up to 2073 conditions per place. [2024-06-14 13:54:02,219 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 191 selfloop transitions, 90 changer transitions 0/287 dead transitions. [2024-06-14 13:54:02,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 287 transitions, 4114 flow [2024-06-14 13:54:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:02,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 13:54:02,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 13:54:02,220 INFO L175 Difference]: Start difference. First operand has 228 places, 266 transitions, 3366 flow. Second operand 7 states and 160 transitions. [2024-06-14 13:54:02,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 287 transitions, 4114 flow [2024-06-14 13:54:02,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 287 transitions, 3897 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:02,467 INFO L231 Difference]: Finished difference. Result has 230 places, 269 transitions, 3383 flow [2024-06-14 13:54:02,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3155, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3383, PETRI_PLACES=230, PETRI_TRANSITIONS=269} [2024-06-14 13:54:02,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 13:54:02,468 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 269 transitions, 3383 flow [2024-06-14 13:54:02,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:02,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:02,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:02,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:54:02,468 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:02,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:02,468 INFO L85 PathProgramCache]: Analyzing trace with hash 384297320, now seen corresponding path program 1 times [2024-06-14 13:54:02,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:02,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952189967] [2024-06-14 13:54:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:02,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:02,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:02,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952189967] [2024-06-14 13:54:02,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952189967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:02,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:02,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:02,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347852330] [2024-06-14 13:54:02,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:02,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:02,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:02,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:02,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:02,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:02,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 269 transitions, 3383 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:02,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:02,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:02,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:03,175 INFO L124 PetriNetUnfolderBase]: 1507/2535 cut-off events. [2024-06-14 13:54:03,175 INFO L125 PetriNetUnfolderBase]: For 90585/90591 co-relation queries the response was YES. [2024-06-14 13:54:03,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16079 conditions, 2535 events. 1507/2535 cut-off events. For 90585/90591 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 14484 event pairs, 313 based on Foata normal form. 7/2542 useless extension candidates. Maximal degree in co-relation 15976. Up to 2139 conditions per place. [2024-06-14 13:54:03,196 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 104 changer transitions 0/296 dead transitions. [2024-06-14 13:54:03,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 296 transitions, 4189 flow [2024-06-14 13:54:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 13:54:03,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-14 13:54:03,198 INFO L175 Difference]: Start difference. First operand has 230 places, 269 transitions, 3383 flow. Second operand 10 states and 211 transitions. [2024-06-14 13:54:03,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 296 transitions, 4189 flow [2024-06-14 13:54:03,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 296 transitions, 4030 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:54:03,445 INFO L231 Difference]: Finished difference. Result has 236 places, 275 transitions, 3528 flow [2024-06-14 13:54:03,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3224, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3528, PETRI_PLACES=236, PETRI_TRANSITIONS=275} [2024-06-14 13:54:03,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-14 13:54:03,446 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 275 transitions, 3528 flow [2024-06-14 13:54:03,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:03,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:03,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:03,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:54:03,446 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:03,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:03,446 INFO L85 PathProgramCache]: Analyzing trace with hash 378756194, now seen corresponding path program 4 times [2024-06-14 13:54:03,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:03,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173866775] [2024-06-14 13:54:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:03,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:03,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:03,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:03,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173866775] [2024-06-14 13:54:03,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173866775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:03,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:03,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:03,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780271357] [2024-06-14 13:54:03,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:03,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:03,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:03,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:03,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:03,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:03,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 275 transitions, 3528 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:03,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:03,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:03,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:04,125 INFO L124 PetriNetUnfolderBase]: 1525/2563 cut-off events. [2024-06-14 13:54:04,125 INFO L125 PetriNetUnfolderBase]: For 96634/96634 co-relation queries the response was YES. [2024-06-14 13:54:04,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16646 conditions, 2563 events. 1525/2563 cut-off events. For 96634/96634 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 14670 event pairs, 321 based on Foata normal form. 1/2563 useless extension candidates. Maximal degree in co-relation 16542. Up to 2165 conditions per place. [2024-06-14 13:54:04,149 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 202 selfloop transitions, 97 changer transitions 0/305 dead transitions. [2024-06-14 13:54:04,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 305 transitions, 4412 flow [2024-06-14 13:54:04,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 13:54:04,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-14 13:54:04,150 INFO L175 Difference]: Start difference. First operand has 236 places, 275 transitions, 3528 flow. Second operand 10 states and 211 transitions. [2024-06-14 13:54:04,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 305 transitions, 4412 flow [2024-06-14 13:54:04,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 305 transitions, 4251 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:04,449 INFO L231 Difference]: Finished difference. Result has 239 places, 284 transitions, 3713 flow [2024-06-14 13:54:04,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3713, PETRI_PLACES=239, PETRI_TRANSITIONS=284} [2024-06-14 13:54:04,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 13:54:04,450 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 284 transitions, 3713 flow [2024-06-14 13:54:04,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:04,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:04,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:04,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:54:04,450 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:04,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:04,451 INFO L85 PathProgramCache]: Analyzing trace with hash -60445466, now seen corresponding path program 7 times [2024-06-14 13:54:04,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:04,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656505231] [2024-06-14 13:54:04,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:04,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:04,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:04,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656505231] [2024-06-14 13:54:04,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656505231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:04,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:04,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:04,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943900448] [2024-06-14 13:54:04,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:04,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:04,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:04,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:04,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:04,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:04,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 284 transitions, 3713 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:04,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:04,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:04,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:05,120 INFO L124 PetriNetUnfolderBase]: 1530/2572 cut-off events. [2024-06-14 13:54:05,120 INFO L125 PetriNetUnfolderBase]: For 98175/98175 co-relation queries the response was YES. [2024-06-14 13:54:05,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17008 conditions, 2572 events. 1530/2572 cut-off events. For 98175/98175 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 14760 event pairs, 321 based on Foata normal form. 1/2572 useless extension candidates. Maximal degree in co-relation 16903. Up to 2230 conditions per place. [2024-06-14 13:54:05,144 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 245 selfloop transitions, 53 changer transitions 0/304 dead transitions. [2024-06-14 13:54:05,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 304 transitions, 4396 flow [2024-06-14 13:54:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 13:54:05,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 13:54:05,145 INFO L175 Difference]: Start difference. First operand has 239 places, 284 transitions, 3713 flow. Second operand 7 states and 155 transitions. [2024-06-14 13:54:05,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 304 transitions, 4396 flow [2024-06-14 13:54:05,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 304 transitions, 4142 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:05,411 INFO L231 Difference]: Finished difference. Result has 240 places, 287 transitions, 3622 flow [2024-06-14 13:54:05,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3459, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3622, PETRI_PLACES=240, PETRI_TRANSITIONS=287} [2024-06-14 13:54:05,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-14 13:54:05,411 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 287 transitions, 3622 flow [2024-06-14 13:54:05,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:05,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:05,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:05,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:54:05,412 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:05,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash 388016018, now seen corresponding path program 8 times [2024-06-14 13:54:05,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:05,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457765660] [2024-06-14 13:54:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:05,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:05,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:05,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:05,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457765660] [2024-06-14 13:54:05,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457765660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:05,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:05,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:05,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209022850] [2024-06-14 13:54:05,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:05,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:05,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:05,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:05,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:05,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:05,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 287 transitions, 3622 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:05,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:05,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:05,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:06,105 INFO L124 PetriNetUnfolderBase]: 1548/2603 cut-off events. [2024-06-14 13:54:06,106 INFO L125 PetriNetUnfolderBase]: For 101054/101054 co-relation queries the response was YES. [2024-06-14 13:54:06,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16993 conditions, 2603 events. 1548/2603 cut-off events. For 101054/101054 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14972 event pairs, 321 based on Foata normal form. 1/2603 useless extension candidates. Maximal degree in co-relation 16887. Up to 2234 conditions per place. [2024-06-14 13:54:06,133 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 237 selfloop transitions, 68 changer transitions 0/311 dead transitions. [2024-06-14 13:54:06,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 311 transitions, 4495 flow [2024-06-14 13:54:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:06,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:06,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 13:54:06,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 13:54:06,134 INFO L175 Difference]: Start difference. First operand has 240 places, 287 transitions, 3622 flow. Second operand 7 states and 156 transitions. [2024-06-14 13:54:06,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 311 transitions, 4495 flow [2024-06-14 13:54:06,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 311 transitions, 4357 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:06,407 INFO L231 Difference]: Finished difference. Result has 243 places, 296 transitions, 3785 flow [2024-06-14 13:54:06,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3785, PETRI_PLACES=243, PETRI_TRANSITIONS=296} [2024-06-14 13:54:06,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-14 13:54:06,408 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 296 transitions, 3785 flow [2024-06-14 13:54:06,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:06,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:06,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:06,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:54:06,408 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:06,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash 388016390, now seen corresponding path program 2 times [2024-06-14 13:54:06,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:06,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293101386] [2024-06-14 13:54:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:06,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:06,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:06,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293101386] [2024-06-14 13:54:06,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293101386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:06,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:06,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:06,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837136679] [2024-06-14 13:54:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:06,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:06,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:06,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:06,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:06,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:06,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 296 transitions, 3785 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:06,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:06,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:06,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:07,153 INFO L124 PetriNetUnfolderBase]: 1566/2635 cut-off events. [2024-06-14 13:54:07,153 INFO L125 PetriNetUnfolderBase]: For 105845/105851 co-relation queries the response was YES. [2024-06-14 13:54:07,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17334 conditions, 2635 events. 1566/2635 cut-off events. For 105845/105851 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15179 event pairs, 313 based on Foata normal form. 7/2642 useless extension candidates. Maximal degree in co-relation 17226. Up to 2291 conditions per place. [2024-06-14 13:54:07,180 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 236 selfloop transitions, 81 changer transitions 0/323 dead transitions. [2024-06-14 13:54:07,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 323 transitions, 4677 flow [2024-06-14 13:54:07,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:07,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:07,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-14 13:54:07,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-14 13:54:07,181 INFO L175 Difference]: Start difference. First operand has 243 places, 296 transitions, 3785 flow. Second operand 10 states and 208 transitions. [2024-06-14 13:54:07,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 323 transitions, 4677 flow [2024-06-14 13:54:07,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 323 transitions, 4575 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 13:54:07,539 INFO L231 Difference]: Finished difference. Result has 252 places, 305 transitions, 3999 flow [2024-06-14 13:54:07,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3685, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3999, PETRI_PLACES=252, PETRI_TRANSITIONS=305} [2024-06-14 13:54:07,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-14 13:54:07,540 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 305 transitions, 3999 flow [2024-06-14 13:54:07,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:07,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:07,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:07,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:54:07,540 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:07,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash -51179690, now seen corresponding path program 5 times [2024-06-14 13:54:07,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:07,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650137129] [2024-06-14 13:54:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:07,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:07,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:07,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650137129] [2024-06-14 13:54:07,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650137129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:07,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:07,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:07,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980410442] [2024-06-14 13:54:07,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:07,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:07,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:07,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:07,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:07,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 305 transitions, 3999 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:07,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:07,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:07,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:08,236 INFO L124 PetriNetUnfolderBase]: 1579/2654 cut-off events. [2024-06-14 13:54:08,236 INFO L125 PetriNetUnfolderBase]: For 111038/111038 co-relation queries the response was YES. [2024-06-14 13:54:08,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17651 conditions, 2654 events. 1579/2654 cut-off events. For 111038/111038 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15304 event pairs, 321 based on Foata normal form. 1/2654 useless extension candidates. Maximal degree in co-relation 17541. Up to 2234 conditions per place. [2024-06-14 13:54:08,262 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 222 selfloop transitions, 101 changer transitions 0/329 dead transitions. [2024-06-14 13:54:08,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 329 transitions, 4975 flow [2024-06-14 13:54:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:08,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:08,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 13:54:08,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 13:54:08,263 INFO L175 Difference]: Start difference. First operand has 252 places, 305 transitions, 3999 flow. Second operand 9 states and 195 transitions. [2024-06-14 13:54:08,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 329 transitions, 4975 flow [2024-06-14 13:54:08,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 329 transitions, 4901 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:08,610 INFO L231 Difference]: Finished difference. Result has 256 places, 311 transitions, 4214 flow [2024-06-14 13:54:08,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4214, PETRI_PLACES=256, PETRI_TRANSITIONS=311} [2024-06-14 13:54:08,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 13:54:08,610 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 311 transitions, 4214 flow [2024-06-14 13:54:08,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:08,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:08,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:08,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:54:08,611 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:08,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:08,611 INFO L85 PathProgramCache]: Analyzing trace with hash 388010624, now seen corresponding path program 6 times [2024-06-14 13:54:08,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:08,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273376933] [2024-06-14 13:54:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:08,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:08,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273376933] [2024-06-14 13:54:08,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273376933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:08,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:08,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:08,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71329772] [2024-06-14 13:54:08,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:08,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:08,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:08,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:08,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:08,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 311 transitions, 4214 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:08,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:08,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:08,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:09,326 INFO L124 PetriNetUnfolderBase]: 1576/2650 cut-off events. [2024-06-14 13:54:09,326 INFO L125 PetriNetUnfolderBase]: For 113750/113750 co-relation queries the response was YES. [2024-06-14 13:54:09,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17850 conditions, 2650 events. 1576/2650 cut-off events. For 113750/113750 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15302 event pairs, 321 based on Foata normal form. 1/2650 useless extension candidates. Maximal degree in co-relation 17738. Up to 2231 conditions per place. [2024-06-14 13:54:09,353 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 103 changer transitions 0/330 dead transitions. [2024-06-14 13:54:09,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 330 transitions, 5012 flow [2024-06-14 13:54:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:54:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:54:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-14 13:54:09,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055432372505543 [2024-06-14 13:54:09,354 INFO L175 Difference]: Start difference. First operand has 256 places, 311 transitions, 4214 flow. Second operand 11 states and 228 transitions. [2024-06-14 13:54:09,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 330 transitions, 5012 flow [2024-06-14 13:54:09,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 330 transitions, 4812 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:09,685 INFO L231 Difference]: Finished difference. Result has 262 places, 311 transitions, 4226 flow [2024-06-14 13:54:09,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4226, PETRI_PLACES=262, PETRI_TRANSITIONS=311} [2024-06-14 13:54:09,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-14 13:54:09,686 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 311 transitions, 4226 flow [2024-06-14 13:54:09,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:09,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:09,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:09,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:54:09,686 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:09,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash -51179504, now seen corresponding path program 3 times [2024-06-14 13:54:09,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:09,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982092169] [2024-06-14 13:54:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:09,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:09,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:09,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982092169] [2024-06-14 13:54:09,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982092169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:09,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:09,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:09,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191326690] [2024-06-14 13:54:09,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:09,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:09,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:09,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:09,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:09,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 311 transitions, 4226 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:09,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:09,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:09,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:10,464 INFO L124 PetriNetUnfolderBase]: 1573/2649 cut-off events. [2024-06-14 13:54:10,464 INFO L125 PetriNetUnfolderBase]: For 115956/115962 co-relation queries the response was YES. [2024-06-14 13:54:10,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17830 conditions, 2649 events. 1573/2649 cut-off events. For 115956/115962 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15334 event pairs, 313 based on Foata normal form. 7/2656 useless extension candidates. Maximal degree in co-relation 17717. Up to 2302 conditions per place. [2024-06-14 13:54:10,487 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 242 selfloop transitions, 81 changer transitions 0/329 dead transitions. [2024-06-14 13:54:10,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 329 transitions, 4914 flow [2024-06-14 13:54:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:54:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:54:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-14 13:54:10,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49667405764966743 [2024-06-14 13:54:10,488 INFO L175 Difference]: Start difference. First operand has 262 places, 311 transitions, 4226 flow. Second operand 11 states and 224 transitions. [2024-06-14 13:54:10,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 329 transitions, 4914 flow [2024-06-14 13:54:10,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 329 transitions, 4661 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 13:54:10,794 INFO L231 Difference]: Finished difference. Result has 263 places, 311 transitions, 4146 flow [2024-06-14 13:54:10,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4146, PETRI_PLACES=263, PETRI_TRANSITIONS=311} [2024-06-14 13:54:10,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-14 13:54:10,794 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 311 transitions, 4146 flow [2024-06-14 13:54:10,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:10,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:10,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:10,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:54:10,795 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:10,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:10,795 INFO L85 PathProgramCache]: Analyzing trace with hash 388010438, now seen corresponding path program 9 times [2024-06-14 13:54:10,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:10,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462086296] [2024-06-14 13:54:10,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:10,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:11,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:11,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462086296] [2024-06-14 13:54:11,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462086296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:11,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:11,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:11,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989924312] [2024-06-14 13:54:11,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:11,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:11,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:11,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:11,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 311 transitions, 4146 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:11,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:11,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:11,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:11,510 INFO L124 PetriNetUnfolderBase]: 1570/2642 cut-off events. [2024-06-14 13:54:11,510 INFO L125 PetriNetUnfolderBase]: For 117939/117939 co-relation queries the response was YES. [2024-06-14 13:54:11,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17739 conditions, 2642 events. 1570/2642 cut-off events. For 117939/117939 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15274 event pairs, 321 based on Foata normal form. 1/2642 useless extension candidates. Maximal degree in co-relation 17625. Up to 2263 conditions per place. [2024-06-14 13:54:11,540 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 248 selfloop transitions, 73 changer transitions 0/327 dead transitions. [2024-06-14 13:54:11,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 327 transitions, 4826 flow [2024-06-14 13:54:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:11,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 13:54:11,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:54:11,542 INFO L175 Difference]: Start difference. First operand has 263 places, 311 transitions, 4146 flow. Second operand 9 states and 189 transitions. [2024-06-14 13:54:11,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 327 transitions, 4826 flow [2024-06-14 13:54:11,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 327 transitions, 4638 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:11,960 INFO L231 Difference]: Finished difference. Result has 263 places, 311 transitions, 4110 flow [2024-06-14 13:54:11,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4110, PETRI_PLACES=263, PETRI_TRANSITIONS=311} [2024-06-14 13:54:11,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-14 13:54:11,961 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 311 transitions, 4110 flow [2024-06-14 13:54:11,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:11,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:11,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:11,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:54:11,962 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:11,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:11,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1405143162, now seen corresponding path program 7 times [2024-06-14 13:54:11,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:11,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450236810] [2024-06-14 13:54:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:11,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:11,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:12,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:12,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450236810] [2024-06-14 13:54:12,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450236810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:12,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:12,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:12,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52444664] [2024-06-14 13:54:12,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:12,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:12,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:12,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:12,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:12,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:12,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 311 transitions, 4110 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:12,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:12,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:12,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:12,659 INFO L124 PetriNetUnfolderBase]: 1583/2664 cut-off events. [2024-06-14 13:54:12,659 INFO L125 PetriNetUnfolderBase]: For 123377/123377 co-relation queries the response was YES. [2024-06-14 13:54:12,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17961 conditions, 2664 events. 1583/2664 cut-off events. For 123377/123377 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15429 event pairs, 321 based on Foata normal form. 1/2664 useless extension candidates. Maximal degree in co-relation 17846. Up to 2238 conditions per place. [2024-06-14 13:54:12,689 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 224 selfloop transitions, 104 changer transitions 0/334 dead transitions. [2024-06-14 13:54:12,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 334 transitions, 5116 flow [2024-06-14 13:54:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:12,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 13:54:12,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:54:12,690 INFO L175 Difference]: Start difference. First operand has 263 places, 311 transitions, 4110 flow. Second operand 8 states and 176 transitions. [2024-06-14 13:54:12,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 334 transitions, 5116 flow [2024-06-14 13:54:13,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 334 transitions, 4945 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:13,113 INFO L231 Difference]: Finished difference. Result has 263 places, 317 transitions, 4245 flow [2024-06-14 13:54:13,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3939, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4245, PETRI_PLACES=263, PETRI_TRANSITIONS=317} [2024-06-14 13:54:13,113 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-14 13:54:13,114 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 317 transitions, 4245 flow [2024-06-14 13:54:13,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:13,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:13,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:13,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:54:13,114 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:13,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:13,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1753893118, now seen corresponding path program 4 times [2024-06-14 13:54:13,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:13,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31841884] [2024-06-14 13:54:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:13,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:13,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:13,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:13,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31841884] [2024-06-14 13:54:13,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31841884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:13,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:13,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:13,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627799113] [2024-06-14 13:54:13,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:13,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:13,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:13,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:13,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:13,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:13,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 317 transitions, 4245 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:13,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:13,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:13,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:13,902 INFO L124 PetriNetUnfolderBase]: 1620/2725 cut-off events. [2024-06-14 13:54:13,903 INFO L125 PetriNetUnfolderBase]: For 131250/131256 co-relation queries the response was YES. [2024-06-14 13:54:13,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18619 conditions, 2725 events. 1620/2725 cut-off events. For 131250/131256 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15823 event pairs, 313 based on Foata normal form. 7/2732 useless extension candidates. Maximal degree in co-relation 18503. Up to 2315 conditions per place. [2024-06-14 13:54:13,931 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 107 changer transitions 0/354 dead transitions. [2024-06-14 13:54:13,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 354 transitions, 5432 flow [2024-06-14 13:54:13,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 13:54:13,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 13:54:13,933 INFO L175 Difference]: Start difference. First operand has 263 places, 317 transitions, 4245 flow. Second operand 10 states and 213 transitions. [2024-06-14 13:54:13,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 354 transitions, 5432 flow [2024-06-14 13:54:14,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 354 transitions, 5253 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:14,292 INFO L231 Difference]: Finished difference. Result has 269 places, 332 transitions, 4567 flow [2024-06-14 13:54:14,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4567, PETRI_PLACES=269, PETRI_TRANSITIONS=332} [2024-06-14 13:54:14,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-14 13:54:14,293 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 332 transitions, 4567 flow [2024-06-14 13:54:14,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:14,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:14,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:14,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:54:14,293 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:14,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:14,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1412494812, now seen corresponding path program 8 times [2024-06-14 13:54:14,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:14,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792368407] [2024-06-14 13:54:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:14,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:14,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:14,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792368407] [2024-06-14 13:54:14,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792368407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:14,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:14,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:14,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884385962] [2024-06-14 13:54:14,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:14,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:14,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:14,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:14,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:14,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:14,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 332 transitions, 4567 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:14,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:14,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:14,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:14,989 INFO L124 PetriNetUnfolderBase]: 1617/2722 cut-off events. [2024-06-14 13:54:14,989 INFO L125 PetriNetUnfolderBase]: For 132961/132967 co-relation queries the response was YES. [2024-06-14 13:54:15,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18666 conditions, 2722 events. 1617/2722 cut-off events. For 132961/132967 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15840 event pairs, 352 based on Foata normal form. 7/2728 useless extension candidates. Maximal degree in co-relation 18549. Up to 2287 conditions per place. [2024-06-14 13:54:15,019 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 242 selfloop transitions, 95 changer transitions 0/343 dead transitions. [2024-06-14 13:54:15,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 343 transitions, 5381 flow [2024-06-14 13:54:15,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:54:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:54:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-14 13:54:15,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:54:15,020 INFO L175 Difference]: Start difference. First operand has 269 places, 332 transitions, 4567 flow. Second operand 6 states and 135 transitions. [2024-06-14 13:54:15,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 343 transitions, 5381 flow [2024-06-14 13:54:15,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 343 transitions, 5242 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:15,465 INFO L231 Difference]: Finished difference. Result has 269 places, 332 transitions, 4628 flow [2024-06-14 13:54:15,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4432, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4628, PETRI_PLACES=269, PETRI_TRANSITIONS=332} [2024-06-14 13:54:15,466 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-14 13:54:15,466 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 332 transitions, 4628 flow [2024-06-14 13:54:15,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:15,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:15,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:15,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:54:15,466 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:15,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1405137396, now seen corresponding path program 10 times [2024-06-14 13:54:15,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:15,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997727178] [2024-06-14 13:54:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:15,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:15,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:15,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997727178] [2024-06-14 13:54:15,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997727178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:15,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:15,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:15,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117634891] [2024-06-14 13:54:15,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:15,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:15,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:15,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:15,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:15,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:15,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 332 transitions, 4628 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:15,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:15,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:15,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:16,235 INFO L124 PetriNetUnfolderBase]: 1614/2714 cut-off events. [2024-06-14 13:54:16,235 INFO L125 PetriNetUnfolderBase]: For 124613/124613 co-relation queries the response was YES. [2024-06-14 13:54:16,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18627 conditions, 2714 events. 1614/2714 cut-off events. For 124613/124613 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15728 event pairs, 321 based on Foata normal form. 1/2714 useless extension candidates. Maximal degree in co-relation 18510. Up to 2238 conditions per place. [2024-06-14 13:54:16,262 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 246 selfloop transitions, 100 changer transitions 0/352 dead transitions. [2024-06-14 13:54:16,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 352 transitions, 5482 flow [2024-06-14 13:54:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:54:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:54:16,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 13:54:16,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 13:54:16,263 INFO L175 Difference]: Start difference. First operand has 269 places, 332 transitions, 4628 flow. Second operand 6 states and 145 transitions. [2024-06-14 13:54:16,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 352 transitions, 5482 flow [2024-06-14 13:54:16,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 352 transitions, 5256 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:16,657 INFO L231 Difference]: Finished difference. Result has 270 places, 332 transitions, 4619 flow [2024-06-14 13:54:16,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4402, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4619, PETRI_PLACES=270, PETRI_TRANSITIONS=332} [2024-06-14 13:54:16,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-14 13:54:16,661 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 332 transitions, 4619 flow [2024-06-14 13:54:16,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:16,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:16,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:16,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:54:16,661 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:16,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:16,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1753898698, now seen corresponding path program 5 times [2024-06-14 13:54:16,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:16,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290782746] [2024-06-14 13:54:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:16,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:16,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:16,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290782746] [2024-06-14 13:54:16,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290782746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:16,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:16,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:16,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588001716] [2024-06-14 13:54:16,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:16,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:16,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:16,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:16,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:16,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:16,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 332 transitions, 4619 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:16,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:16,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:16,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:17,402 INFO L124 PetriNetUnfolderBase]: 1611/2713 cut-off events. [2024-06-14 13:54:17,402 INFO L125 PetriNetUnfolderBase]: For 127187/127193 co-relation queries the response was YES. [2024-06-14 13:54:17,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18663 conditions, 2713 events. 1611/2713 cut-off events. For 127187/127193 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15768 event pairs, 313 based on Foata normal form. 7/2720 useless extension candidates. Maximal degree in co-relation 18545. Up to 2304 conditions per place. [2024-06-14 13:54:17,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 107 changer transitions 0/351 dead transitions. [2024-06-14 13:54:17,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 351 transitions, 5469 flow [2024-06-14 13:54:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:17,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 13:54:17,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:54:17,431 INFO L175 Difference]: Start difference. First operand has 270 places, 332 transitions, 4619 flow. Second operand 8 states and 176 transitions. [2024-06-14 13:54:17,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 351 transitions, 5469 flow [2024-06-14 13:54:17,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 351 transitions, 5176 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:17,810 INFO L231 Difference]: Finished difference. Result has 271 places, 332 transitions, 4562 flow [2024-06-14 13:54:17,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4562, PETRI_PLACES=271, PETRI_TRANSITIONS=332} [2024-06-14 13:54:17,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-14 13:54:17,810 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 332 transitions, 4562 flow [2024-06-14 13:54:17,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:17,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:17,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:17,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:54:17,811 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:17,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1412494998, now seen corresponding path program 6 times [2024-06-14 13:54:17,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:17,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76535664] [2024-06-14 13:54:17,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:17,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:18,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:18,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76535664] [2024-06-14 13:54:18,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76535664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:18,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:18,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:18,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558704657] [2024-06-14 13:54:18,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:18,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:18,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:18,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:18,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:18,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:18,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 332 transitions, 4562 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:18,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:18,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:18,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:18,652 INFO L124 PetriNetUnfolderBase]: 1608/2712 cut-off events. [2024-06-14 13:54:18,652 INFO L125 PetriNetUnfolderBase]: For 123388/123400 co-relation queries the response was YES. [2024-06-14 13:54:18,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18449 conditions, 2712 events. 1608/2712 cut-off events. For 123388/123400 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15828 event pairs, 331 based on Foata normal form. 13/2725 useless extension candidates. Maximal degree in co-relation 18331. Up to 2301 conditions per place. [2024-06-14 13:54:18,684 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 103 changer transitions 0/347 dead transitions. [2024-06-14 13:54:18,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 347 transitions, 5280 flow [2024-06-14 13:54:18,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:18,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 13:54:18,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:54:18,685 INFO L175 Difference]: Start difference. First operand has 271 places, 332 transitions, 4562 flow. Second operand 8 states and 172 transitions. [2024-06-14 13:54:18,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 347 transitions, 5280 flow [2024-06-14 13:54:19,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 347 transitions, 5040 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:19,078 INFO L231 Difference]: Finished difference. Result has 270 places, 332 transitions, 4538 flow [2024-06-14 13:54:19,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4538, PETRI_PLACES=270, PETRI_TRANSITIONS=332} [2024-06-14 13:54:19,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-14 13:54:19,078 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 332 transitions, 4538 flow [2024-06-14 13:54:19,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:19,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:19,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:19,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:54:19,079 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:19,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1405131816, now seen corresponding path program 11 times [2024-06-14 13:54:19,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:19,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759721102] [2024-06-14 13:54:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:19,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:19,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:19,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759721102] [2024-06-14 13:54:19,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759721102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:19,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:19,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:19,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957061261] [2024-06-14 13:54:19,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:19,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:19,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:19,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:19,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:19,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:19,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 332 transitions, 4538 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:19,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:19,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:19,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:19,813 INFO L124 PetriNetUnfolderBase]: 1605/2702 cut-off events. [2024-06-14 13:54:19,813 INFO L125 PetriNetUnfolderBase]: For 115779/115779 co-relation queries the response was YES. [2024-06-14 13:54:19,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18257 conditions, 2702 events. 1605/2702 cut-off events. For 115779/115779 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15653 event pairs, 321 based on Foata normal form. 1/2702 useless extension candidates. Maximal degree in co-relation 18140. Up to 2227 conditions per place. [2024-06-14 13:54:19,841 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 247 selfloop transitions, 106 changer transitions 0/359 dead transitions. [2024-06-14 13:54:19,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 359 transitions, 5312 flow [2024-06-14 13:54:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:54:19,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:54:19,842 INFO L175 Difference]: Start difference. First operand has 270 places, 332 transitions, 4538 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:54:19,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 359 transitions, 5312 flow [2024-06-14 13:54:20,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 359 transitions, 5062 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:20,204 INFO L231 Difference]: Finished difference. Result has 271 places, 332 transitions, 4518 flow [2024-06-14 13:54:20,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4288, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4518, PETRI_PLACES=271, PETRI_TRANSITIONS=332} [2024-06-14 13:54:20,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-14 13:54:20,205 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 332 transitions, 4518 flow [2024-06-14 13:54:20,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:20,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:20,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:20,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:54:20,205 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:20,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:20,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1405132002, now seen corresponding path program 9 times [2024-06-14 13:54:20,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:20,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522457183] [2024-06-14 13:54:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:20,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:20,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:20,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:20,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522457183] [2024-06-14 13:54:20,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522457183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:20,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:20,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709507365] [2024-06-14 13:54:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:20,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:20,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:20,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:20,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:20,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 332 transitions, 4518 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:20,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:20,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:20,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:20,942 INFO L124 PetriNetUnfolderBase]: 1602/2698 cut-off events. [2024-06-14 13:54:20,942 INFO L125 PetriNetUnfolderBase]: For 114432/114432 co-relation queries the response was YES. [2024-06-14 13:54:20,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18209 conditions, 2698 events. 1602/2698 cut-off events. For 114432/114432 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 15668 event pairs, 321 based on Foata normal form. 1/2698 useless extension candidates. Maximal degree in co-relation 18092. Up to 2268 conditions per place. [2024-06-14 13:54:20,971 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 234 selfloop transitions, 111 changer transitions 0/351 dead transitions. [2024-06-14 13:54:20,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 351 transitions, 5254 flow [2024-06-14 13:54:20,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 13:54:20,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-14 13:54:20,972 INFO L175 Difference]: Start difference. First operand has 271 places, 332 transitions, 4518 flow. Second operand 9 states and 193 transitions. [2024-06-14 13:54:20,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 351 transitions, 5254 flow [2024-06-14 13:54:21,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 351 transitions, 5000 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:21,292 INFO L231 Difference]: Finished difference. Result has 271 places, 332 transitions, 4500 flow [2024-06-14 13:54:21,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4500, PETRI_PLACES=271, PETRI_TRANSITIONS=332} [2024-06-14 13:54:21,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-14 13:54:21,293 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 332 transitions, 4500 flow [2024-06-14 13:54:21,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:21,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:21,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:21,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:54:21,293 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:21,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:21,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1282336186, now seen corresponding path program 7 times [2024-06-14 13:54:21,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:21,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170704927] [2024-06-14 13:54:21,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:21,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:21,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:21,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170704927] [2024-06-14 13:54:21,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170704927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:21,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:21,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:21,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931810086] [2024-06-14 13:54:21,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:21,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:21,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:21,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:21,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 332 transitions, 4500 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:21,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:21,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:21,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:22,066 INFO L124 PetriNetUnfolderBase]: 1607/2706 cut-off events. [2024-06-14 13:54:22,066 INFO L125 PetriNetUnfolderBase]: For 106923/106923 co-relation queries the response was YES. [2024-06-14 13:54:22,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18084 conditions, 2706 events. 1607/2706 cut-off events. For 106923/106923 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 15704 event pairs, 304 based on Foata normal form. 1/2707 useless extension candidates. Maximal degree in co-relation 17968. Up to 2225 conditions per place. [2024-06-14 13:54:22,096 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 228 selfloop transitions, 141 changer transitions 0/375 dead transitions. [2024-06-14 13:54:22,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 375 transitions, 5532 flow [2024-06-14 13:54:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:54:22,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:54:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-06-14 13:54:22,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159474671669794 [2024-06-14 13:54:22,097 INFO L175 Difference]: Start difference. First operand has 271 places, 332 transitions, 4500 flow. Second operand 13 states and 275 transitions. [2024-06-14 13:54:22,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 375 transitions, 5532 flow [2024-06-14 13:54:22,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 375 transitions, 5252 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 13:54:22,384 INFO L231 Difference]: Finished difference. Result has 273 places, 338 transitions, 4610 flow [2024-06-14 13:54:22,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4610, PETRI_PLACES=273, PETRI_TRANSITIONS=338} [2024-06-14 13:54:22,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-14 13:54:22,385 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 338 transitions, 4610 flow [2024-06-14 13:54:22,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:22,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:22,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:22,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:54:22,385 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:22,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:22,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2003692922, now seen corresponding path program 8 times [2024-06-14 13:54:22,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:22,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005875686] [2024-06-14 13:54:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:22,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:22,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:22,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005875686] [2024-06-14 13:54:22,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005875686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:22,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:22,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:22,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982659281] [2024-06-14 13:54:22,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:22,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:22,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:22,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:22,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:22,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 338 transitions, 4610 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:22,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:22,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:22,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:23,204 INFO L124 PetriNetUnfolderBase]: 1612/2721 cut-off events. [2024-06-14 13:54:23,204 INFO L125 PetriNetUnfolderBase]: For 105272/105278 co-relation queries the response was YES. [2024-06-14 13:54:23,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18335 conditions, 2721 events. 1612/2721 cut-off events. For 105272/105278 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 15874 event pairs, 315 based on Foata normal form. 7/2728 useless extension candidates. Maximal degree in co-relation 18221. Up to 2390 conditions per place. [2024-06-14 13:54:23,231 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 50 changer transitions 0/355 dead transitions. [2024-06-14 13:54:23,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 355 transitions, 5382 flow [2024-06-14 13:54:23,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:23,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 13:54:23,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 13:54:23,232 INFO L175 Difference]: Start difference. First operand has 273 places, 338 transitions, 4610 flow. Second operand 7 states and 152 transitions. [2024-06-14 13:54:23,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 355 transitions, 5382 flow [2024-06-14 13:54:23,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 355 transitions, 5118 flow, removed 55 selfloop flow, removed 10 redundant places. [2024-06-14 13:54:23,525 INFO L231 Difference]: Finished difference. Result has 270 places, 341 transitions, 4506 flow [2024-06-14 13:54:23,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4350, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4506, PETRI_PLACES=270, PETRI_TRANSITIONS=341} [2024-06-14 13:54:23,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-14 13:54:23,525 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 341 transitions, 4506 flow [2024-06-14 13:54:23,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:23,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:23,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:23,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:54:23,526 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:23,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash -2003277212, now seen corresponding path program 9 times [2024-06-14 13:54:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:23,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489141301] [2024-06-14 13:54:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:23,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:23,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:23,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489141301] [2024-06-14 13:54:23,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489141301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:23,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:23,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:23,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420504909] [2024-06-14 13:54:23,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:23,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:23,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:23,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 341 transitions, 4506 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:23,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:23,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:23,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:24,295 INFO L124 PetriNetUnfolderBase]: 1625/2741 cut-off events. [2024-06-14 13:54:24,295 INFO L125 PetriNetUnfolderBase]: For 107881/107881 co-relation queries the response was YES. [2024-06-14 13:54:24,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18278 conditions, 2741 events. 1625/2741 cut-off events. For 107881/107881 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 16032 event pairs, 306 based on Foata normal form. 1/2742 useless extension candidates. Maximal degree in co-relation 18164. Up to 2346 conditions per place. [2024-06-14 13:54:24,323 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 269 selfloop transitions, 101 changer transitions 0/376 dead transitions. [2024-06-14 13:54:24,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 376 transitions, 5508 flow [2024-06-14 13:54:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:54:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:54:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 13:54:24,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 13:54:24,324 INFO L175 Difference]: Start difference. First operand has 270 places, 341 transitions, 4506 flow. Second operand 11 states and 236 transitions. [2024-06-14 13:54:24,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 376 transitions, 5508 flow [2024-06-14 13:54:24,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 376 transitions, 5408 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:24,583 INFO L231 Difference]: Finished difference. Result has 276 places, 347 transitions, 4700 flow [2024-06-14 13:54:24,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4406, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4700, PETRI_PLACES=276, PETRI_TRANSITIONS=347} [2024-06-14 13:54:24,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-14 13:54:24,584 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 347 transitions, 4700 flow [2024-06-14 13:54:24,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:24,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:24,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:24,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:54:24,584 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:24,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:24,585 INFO L85 PathProgramCache]: Analyzing trace with hash 207570136, now seen corresponding path program 10 times [2024-06-14 13:54:24,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:24,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196411154] [2024-06-14 13:54:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:24,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:24,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:24,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196411154] [2024-06-14 13:54:24,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196411154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:24,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:24,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:24,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069576673] [2024-06-14 13:54:24,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:24,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:24,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:24,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:24,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:24,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:24,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 347 transitions, 4700 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:24,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:24,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:24,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:25,389 INFO L124 PetriNetUnfolderBase]: 1630/2742 cut-off events. [2024-06-14 13:54:25,389 INFO L125 PetriNetUnfolderBase]: For 111506/111506 co-relation queries the response was YES. [2024-06-14 13:54:25,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18519 conditions, 2742 events. 1630/2742 cut-off events. For 111506/111506 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 15950 event pairs, 304 based on Foata normal form. 1/2743 useless extension candidates. Maximal degree in co-relation 18404. Up to 2352 conditions per place. [2024-06-14 13:54:25,417 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 269 selfloop transitions, 108 changer transitions 0/383 dead transitions. [2024-06-14 13:54:25,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 383 transitions, 5692 flow [2024-06-14 13:54:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:54:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:54:25,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 301 transitions. [2024-06-14 13:54:25,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894308943089431 [2024-06-14 13:54:25,419 INFO L175 Difference]: Start difference. First operand has 276 places, 347 transitions, 4700 flow. Second operand 15 states and 301 transitions. [2024-06-14 13:54:25,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 383 transitions, 5692 flow [2024-06-14 13:54:25,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 383 transitions, 5558 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:25,694 INFO L231 Difference]: Finished difference. Result has 284 places, 350 transitions, 4834 flow [2024-06-14 13:54:25,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4568, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4834, PETRI_PLACES=284, PETRI_TRANSITIONS=350} [2024-06-14 13:54:25,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-14 13:54:25,694 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 350 transitions, 4834 flow [2024-06-14 13:54:25,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:25,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:25,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:25,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:54:25,695 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:25,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:25,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1998152168, now seen corresponding path program 10 times [2024-06-14 13:54:25,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:25,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294570114] [2024-06-14 13:54:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:25,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:25,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:25,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294570114] [2024-06-14 13:54:25,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294570114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:25,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:25,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:25,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022161516] [2024-06-14 13:54:25,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:25,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:25,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:25,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:26,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:26,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 350 transitions, 4834 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:26,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:26,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:26,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:26,523 INFO L124 PetriNetUnfolderBase]: 1635/2751 cut-off events. [2024-06-14 13:54:26,523 INFO L125 PetriNetUnfolderBase]: For 115315/115315 co-relation queries the response was YES. [2024-06-14 13:54:26,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18825 conditions, 2751 events. 1635/2751 cut-off events. For 115315/115315 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16031 event pairs, 304 based on Foata normal form. 1/2752 useless extension candidates. Maximal degree in co-relation 18708. Up to 2283 conditions per place. [2024-06-14 13:54:26,553 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 260 selfloop transitions, 120 changer transitions 0/386 dead transitions. [2024-06-14 13:54:26,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 386 transitions, 5898 flow [2024-06-14 13:54:26,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-14 13:54:26,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:54:26,554 INFO L175 Difference]: Start difference. First operand has 284 places, 350 transitions, 4834 flow. Second operand 12 states and 252 transitions. [2024-06-14 13:54:26,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 386 transitions, 5898 flow [2024-06-14 13:54:26,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 386 transitions, 5654 flow, removed 20 selfloop flow, removed 12 redundant places. [2024-06-14 13:54:26,875 INFO L231 Difference]: Finished difference. Result has 284 places, 356 transitions, 4958 flow [2024-06-14 13:54:26,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4958, PETRI_PLACES=284, PETRI_TRANSITIONS=356} [2024-06-14 13:54:26,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-14 13:54:26,875 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 356 transitions, 4958 flow [2024-06-14 13:54:26,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:26,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:26,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:26,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:54:26,876 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:26,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:26,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1997914832, now seen corresponding path program 11 times [2024-06-14 13:54:26,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:26,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023176604] [2024-06-14 13:54:26,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:26,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:27,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:27,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023176604] [2024-06-14 13:54:27,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023176604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:27,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:27,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:27,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773763323] [2024-06-14 13:54:27,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:27,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:27,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:27,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:27,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:27,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:27,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 356 transitions, 4958 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:27,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:27,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:27,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:27,696 INFO L124 PetriNetUnfolderBase]: 1632/2751 cut-off events. [2024-06-14 13:54:27,696 INFO L125 PetriNetUnfolderBase]: For 118705/118705 co-relation queries the response was YES. [2024-06-14 13:54:27,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18999 conditions, 2751 events. 1632/2751 cut-off events. For 118705/118705 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16084 event pairs, 306 based on Foata normal form. 1/2752 useless extension candidates. Maximal degree in co-relation 18881. Up to 2356 conditions per place. [2024-06-14 13:54:27,725 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 274 selfloop transitions, 107 changer transitions 0/387 dead transitions. [2024-06-14 13:54:27,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 387 transitions, 5800 flow [2024-06-14 13:54:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:54:27,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:54:27,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 284 transitions. [2024-06-14 13:54:27,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-14 13:54:27,726 INFO L175 Difference]: Start difference. First operand has 284 places, 356 transitions, 4958 flow. Second operand 14 states and 284 transitions. [2024-06-14 13:54:27,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 387 transitions, 5800 flow [2024-06-14 13:54:28,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 387 transitions, 5656 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:28,095 INFO L231 Difference]: Finished difference. Result has 292 places, 356 transitions, 5034 flow [2024-06-14 13:54:28,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4814, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5034, PETRI_PLACES=292, PETRI_TRANSITIONS=356} [2024-06-14 13:54:28,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-14 13:54:28,096 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 356 transitions, 5034 flow [2024-06-14 13:54:28,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:28,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:28,096 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] [2024-06-14 13:54:28,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:54:28,096 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:28,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:28,097 INFO L85 PathProgramCache]: Analyzing trace with hash 492375144, now seen corresponding path program 12 times [2024-06-14 13:54:28,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:28,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729379700] [2024-06-14 13:54:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:28,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:28,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:28,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729379700] [2024-06-14 13:54:28,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729379700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:28,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:28,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:28,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717946169] [2024-06-14 13:54:28,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:28,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:28,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:28,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:28,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:28,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:28,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 356 transitions, 5034 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:28,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:28,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:28,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:28,935 INFO L124 PetriNetUnfolderBase]: 1629/2749 cut-off events. [2024-06-14 13:54:28,935 INFO L125 PetriNetUnfolderBase]: For 119687/119693 co-relation queries the response was YES. [2024-06-14 13:54:28,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18942 conditions, 2749 events. 1629/2749 cut-off events. For 119687/119693 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 16091 event pairs, 315 based on Foata normal form. 7/2756 useless extension candidates. Maximal degree in co-relation 18822. Up to 2362 conditions per place. [2024-06-14 13:54:28,964 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 294 selfloop transitions, 72 changer transitions 0/372 dead transitions. [2024-06-14 13:54:28,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 372 transitions, 5806 flow [2024-06-14 13:54:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:54:28,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:54:28,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 13:54:28,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:54:28,965 INFO L175 Difference]: Start difference. First operand has 292 places, 356 transitions, 5034 flow. Second operand 6 states and 138 transitions. [2024-06-14 13:54:28,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 372 transitions, 5806 flow [2024-06-14 13:54:29,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 372 transitions, 5550 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-14 13:54:29,412 INFO L231 Difference]: Finished difference. Result has 284 places, 356 transitions, 4948 flow [2024-06-14 13:54:29,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4778, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4948, PETRI_PLACES=284, PETRI_TRANSITIONS=356} [2024-06-14 13:54:29,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-14 13:54:29,412 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 356 transitions, 4948 flow [2024-06-14 13:54:29,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:29,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:29,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:29,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:54:29,413 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:29,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:29,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1204219214, now seen corresponding path program 11 times [2024-06-14 13:54:29,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:29,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684854006] [2024-06-14 13:54:29,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:29,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:29,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:29,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684854006] [2024-06-14 13:54:29,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684854006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:29,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:29,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:29,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539572220] [2024-06-14 13:54:29,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:29,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:29,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:29,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:29,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:29,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 356 transitions, 4948 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:29,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:29,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:29,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:30,221 INFO L124 PetriNetUnfolderBase]: 1634/2756 cut-off events. [2024-06-14 13:54:30,221 INFO L125 PetriNetUnfolderBase]: For 123245/123245 co-relation queries the response was YES. [2024-06-14 13:54:30,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19012 conditions, 2756 events. 1634/2756 cut-off events. For 123245/123245 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 16104 event pairs, 305 based on Foata normal form. 1/2757 useless extension candidates. Maximal degree in co-relation 18891. Up to 2448 conditions per place. [2024-06-14 13:54:30,251 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 343 selfloop transitions, 30 changer transitions 0/379 dead transitions. [2024-06-14 13:54:30,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 379 transitions, 5806 flow [2024-06-14 13:54:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 13:54:30,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-14 13:54:30,255 INFO L175 Difference]: Start difference. First operand has 284 places, 356 transitions, 4948 flow. Second operand 9 states and 186 transitions. [2024-06-14 13:54:30,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 379 transitions, 5806 flow [2024-06-14 13:54:30,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 379 transitions, 5616 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:30,640 INFO L231 Difference]: Finished difference. Result has 287 places, 359 transitions, 4888 flow [2024-06-14 13:54:30,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4888, PETRI_PLACES=287, PETRI_TRANSITIONS=359} [2024-06-14 13:54:30,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-14 13:54:30,640 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 359 transitions, 4888 flow [2024-06-14 13:54:30,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:30,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:30,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:30,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:54:30,641 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:30,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:30,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1204214564, now seen corresponding path program 12 times [2024-06-14 13:54:30,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:30,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208461852] [2024-06-14 13:54:30,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:30,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:30,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:30,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208461852] [2024-06-14 13:54:30,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208461852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:30,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:30,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:30,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97013381] [2024-06-14 13:54:30,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:30,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:30,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:30,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:30,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:30,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:30,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 359 transitions, 4888 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:30,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:30,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:30,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:31,368 INFO L124 PetriNetUnfolderBase]: 1639/2762 cut-off events. [2024-06-14 13:54:31,368 INFO L125 PetriNetUnfolderBase]: For 120195/120197 co-relation queries the response was YES. [2024-06-14 13:54:31,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18892 conditions, 2762 events. 1639/2762 cut-off events. For 120195/120197 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 16140 event pairs, 309 based on Foata normal form. 3/2765 useless extension candidates. Maximal degree in co-relation 18771. Up to 2287 conditions per place. [2024-06-14 13:54:31,397 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 257 selfloop transitions, 120 changer transitions 0/383 dead transitions. [2024-06-14 13:54:31,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 383 transitions, 5876 flow [2024-06-14 13:54:31,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:31,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:54:31,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 13:54:31,399 INFO L175 Difference]: Start difference. First operand has 287 places, 359 transitions, 4888 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:54:31,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 383 transitions, 5876 flow [2024-06-14 13:54:31,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 383 transitions, 5753 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:31,793 INFO L231 Difference]: Finished difference. Result has 289 places, 362 transitions, 5075 flow [2024-06-14 13:54:31,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5075, PETRI_PLACES=289, PETRI_TRANSITIONS=362} [2024-06-14 13:54:31,794 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-14 13:54:31,794 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 362 transitions, 5075 flow [2024-06-14 13:54:31,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:31,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:31,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:31,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:54:31,794 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:31,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:31,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1204214378, now seen corresponding path program 13 times [2024-06-14 13:54:31,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:31,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793864195] [2024-06-14 13:54:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:31,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:32,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:32,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:32,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793864195] [2024-06-14 13:54:32,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793864195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:32,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:32,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:32,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908269947] [2024-06-14 13:54:32,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:32,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:32,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:32,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:32,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:32,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:32,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 362 transitions, 5075 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:32,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:32,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:32,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:32,606 INFO L124 PetriNetUnfolderBase]: 1644/2769 cut-off events. [2024-06-14 13:54:32,606 INFO L125 PetriNetUnfolderBase]: For 124515/124517 co-relation queries the response was YES. [2024-06-14 13:54:32,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19142 conditions, 2769 events. 1644/2769 cut-off events. For 124515/124517 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 16191 event pairs, 309 based on Foata normal form. 3/2772 useless extension candidates. Maximal degree in co-relation 19021. Up to 2292 conditions per place. [2024-06-14 13:54:32,636 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 239 selfloop transitions, 147 changer transitions 0/392 dead transitions. [2024-06-14 13:54:32,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 392 transitions, 6079 flow [2024-06-14 13:54:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:32,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:32,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-14 13:54:32,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-14 13:54:32,637 INFO L175 Difference]: Start difference. First operand has 289 places, 362 transitions, 5075 flow. Second operand 12 states and 247 transitions. [2024-06-14 13:54:32,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 392 transitions, 6079 flow [2024-06-14 13:54:33,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 392 transitions, 5810 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:33,079 INFO L231 Difference]: Finished difference. Result has 296 places, 365 transitions, 5152 flow [2024-06-14 13:54:33,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4806, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5152, PETRI_PLACES=296, PETRI_TRANSITIONS=365} [2024-06-14 13:54:33,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 13:54:33,079 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 365 transitions, 5152 flow [2024-06-14 13:54:33,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:33,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:33,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:33,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:54:33,079 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:33,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:33,080 INFO L85 PathProgramCache]: Analyzing trace with hash 492790854, now seen corresponding path program 14 times [2024-06-14 13:54:33,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:33,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544569151] [2024-06-14 13:54:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:33,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:33,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:33,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:33,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544569151] [2024-06-14 13:54:33,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544569151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:33,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:33,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:33,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151763099] [2024-06-14 13:54:33,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:33,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:33,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:33,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:33,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:33,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:33,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 365 transitions, 5152 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:33,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:33,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:33,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:33,914 INFO L124 PetriNetUnfolderBase]: 1649/2781 cut-off events. [2024-06-14 13:54:33,914 INFO L125 PetriNetUnfolderBase]: For 127702/127702 co-relation queries the response was YES. [2024-06-14 13:54:33,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19141 conditions, 2781 events. 1649/2781 cut-off events. For 127702/127702 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 16318 event pairs, 306 based on Foata normal form. 1/2782 useless extension candidates. Maximal degree in co-relation 19020. Up to 2298 conditions per place. [2024-06-14 13:54:33,944 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 145 changer transitions 0/398 dead transitions. [2024-06-14 13:54:33,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 398 transitions, 6186 flow [2024-06-14 13:54:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 13:54:33,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:54:33,946 INFO L175 Difference]: Start difference. First operand has 296 places, 365 transitions, 5152 flow. Second operand 9 states and 204 transitions. [2024-06-14 13:54:33,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 398 transitions, 6186 flow [2024-06-14 13:54:34,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 398 transitions, 5780 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:34,403 INFO L231 Difference]: Finished difference. Result has 296 places, 368 transitions, 5098 flow [2024-06-14 13:54:34,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5098, PETRI_PLACES=296, PETRI_TRANSITIONS=368} [2024-06-14 13:54:34,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 13:54:34,403 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 368 transitions, 5098 flow [2024-06-14 13:54:34,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:34,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:34,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:34,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:54:34,404 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:34,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:34,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1027082858, now seen corresponding path program 15 times [2024-06-14 13:54:34,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:34,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523381173] [2024-06-14 13:54:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:34,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:34,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:34,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523381173] [2024-06-14 13:54:34,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523381173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:34,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:34,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:34,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280761299] [2024-06-14 13:54:34,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:34,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:34,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:34,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:34,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:34,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:34,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 368 transitions, 5098 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:34,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:34,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:34,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:35,240 INFO L124 PetriNetUnfolderBase]: 1662/2800 cut-off events. [2024-06-14 13:54:35,240 INFO L125 PetriNetUnfolderBase]: For 134248/134250 co-relation queries the response was YES. [2024-06-14 13:54:35,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19135 conditions, 2800 events. 1662/2800 cut-off events. For 134248/134250 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 16412 event pairs, 311 based on Foata normal form. 3/2803 useless extension candidates. Maximal degree in co-relation 19014. Up to 2313 conditions per place. [2024-06-14 13:54:35,268 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 154 changer transitions 0/404 dead transitions. [2024-06-14 13:54:35,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 404 transitions, 6288 flow [2024-06-14 13:54:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:54:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:54:35,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 282 transitions. [2024-06-14 13:54:35,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-14 13:54:35,269 INFO L175 Difference]: Start difference. First operand has 296 places, 368 transitions, 5098 flow. Second operand 14 states and 282 transitions. [2024-06-14 13:54:35,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 404 transitions, 6288 flow [2024-06-14 13:54:35,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 404 transitions, 6030 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:35,666 INFO L231 Difference]: Finished difference. Result has 301 places, 374 transitions, 5236 flow [2024-06-14 13:54:35,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5236, PETRI_PLACES=301, PETRI_TRANSITIONS=374} [2024-06-14 13:54:35,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-14 13:54:35,666 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 374 transitions, 5236 flow [2024-06-14 13:54:35,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:35,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:35,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:35,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:54:35,666 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:35,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1027083044, now seen corresponding path program 13 times [2024-06-14 13:54:35,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:35,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445970046] [2024-06-14 13:54:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:35,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:35,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:35,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445970046] [2024-06-14 13:54:35,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445970046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:35,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:35,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:35,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271332340] [2024-06-14 13:54:35,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:35,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:35,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:35,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:35,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:35,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:35,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 374 transitions, 5236 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:35,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:35,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:35,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:36,453 INFO L124 PetriNetUnfolderBase]: 1667/2807 cut-off events. [2024-06-14 13:54:36,453 INFO L125 PetriNetUnfolderBase]: For 134907/134909 co-relation queries the response was YES. [2024-06-14 13:54:36,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19222 conditions, 2807 events. 1667/2807 cut-off events. For 134907/134909 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 16464 event pairs, 309 based on Foata normal form. 3/2810 useless extension candidates. Maximal degree in co-relation 19101. Up to 2325 conditions per place. [2024-06-14 13:54:36,480 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 267 selfloop transitions, 126 changer transitions 0/399 dead transitions. [2024-06-14 13:54:36,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 399 transitions, 6255 flow [2024-06-14 13:54:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 13:54:36,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-14 13:54:36,481 INFO L175 Difference]: Start difference. First operand has 301 places, 374 transitions, 5236 flow. Second operand 10 states and 209 transitions. [2024-06-14 13:54:36,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 399 transitions, 6255 flow [2024-06-14 13:54:36,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 399 transitions, 5990 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:36,856 INFO L231 Difference]: Finished difference. Result has 302 places, 377 transitions, 5284 flow [2024-06-14 13:54:36,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4971, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5284, PETRI_PLACES=302, PETRI_TRANSITIONS=377} [2024-06-14 13:54:36,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 13:54:36,856 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 377 transitions, 5284 flow [2024-06-14 13:54:36,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:36,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:36,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:36,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:54:36,857 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:36,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash 497915898, now seen corresponding path program 14 times [2024-06-14 13:54:36,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:36,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601521118] [2024-06-14 13:54:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:36,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:37,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:37,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:37,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601521118] [2024-06-14 13:54:37,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601521118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:37,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:37,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:37,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848592749] [2024-06-14 13:54:37,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:37,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:37,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:37,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 377 transitions, 5284 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:37,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:37,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:37,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:37,653 INFO L124 PetriNetUnfolderBase]: 1664/2800 cut-off events. [2024-06-14 13:54:37,653 INFO L125 PetriNetUnfolderBase]: For 135950/135950 co-relation queries the response was YES. [2024-06-14 13:54:37,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19134 conditions, 2800 events. 1664/2800 cut-off events. For 135950/135950 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 16383 event pairs, 304 based on Foata normal form. 1/2801 useless extension candidates. Maximal degree in co-relation 19012. Up to 2322 conditions per place. [2024-06-14 13:54:37,688 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 130 changer transitions 0/404 dead transitions. [2024-06-14 13:54:37,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 404 transitions, 6152 flow [2024-06-14 13:54:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:37,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:37,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-14 13:54:37,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-14 13:54:37,689 INFO L175 Difference]: Start difference. First operand has 302 places, 377 transitions, 5284 flow. Second operand 10 states and 216 transitions. [2024-06-14 13:54:37,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 404 transitions, 6152 flow [2024-06-14 13:54:38,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 404 transitions, 5909 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:38,159 INFO L231 Difference]: Finished difference. Result has 305 places, 377 transitions, 5311 flow [2024-06-14 13:54:38,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5041, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5311, PETRI_PLACES=305, PETRI_TRANSITIONS=377} [2024-06-14 13:54:38,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-14 13:54:38,160 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 377 transitions, 5311 flow [2024-06-14 13:54:38,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:38,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:38,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:38,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:54:38,160 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:38,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:38,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1026845708, now seen corresponding path program 16 times [2024-06-14 13:54:38,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:38,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932107890] [2024-06-14 13:54:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:38,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:38,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:38,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932107890] [2024-06-14 13:54:38,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932107890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:38,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:38,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:38,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219931853] [2024-06-14 13:54:38,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:38,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:38,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:38,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:38,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:38,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:38,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 377 transitions, 5311 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:38,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:38,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:38,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:38,996 INFO L124 PetriNetUnfolderBase]: 1661/2801 cut-off events. [2024-06-14 13:54:38,997 INFO L125 PetriNetUnfolderBase]: For 138897/138899 co-relation queries the response was YES. [2024-06-14 13:54:39,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19115 conditions, 2801 events. 1661/2801 cut-off events. For 138897/138899 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 16440 event pairs, 311 based on Foata normal form. 3/2804 useless extension candidates. Maximal degree in co-relation 18992. Up to 2313 conditions per place. [2024-06-14 13:54:39,027 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 154 changer transitions 0/404 dead transitions. [2024-06-14 13:54:39,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 404 transitions, 6301 flow [2024-06-14 13:54:39,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-14 13:54:39,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-14 13:54:39,028 INFO L175 Difference]: Start difference. First operand has 305 places, 377 transitions, 5311 flow. Second operand 12 states and 247 transitions. [2024-06-14 13:54:39,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 404 transitions, 6301 flow [2024-06-14 13:54:39,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 404 transitions, 6035 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:39,446 INFO L231 Difference]: Finished difference. Result has 308 places, 377 transitions, 5361 flow [2024-06-14 13:54:39,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5047, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5361, PETRI_PLACES=308, PETRI_TRANSITIONS=377} [2024-06-14 13:54:39,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-14 13:54:39,447 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 377 transitions, 5361 flow [2024-06-14 13:54:39,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:39,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:39,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:39,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:54:39,447 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:39,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:39,447 INFO L85 PathProgramCache]: Analyzing trace with hash 498153234, now seen corresponding path program 17 times [2024-06-14 13:54:39,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:39,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859100982] [2024-06-14 13:54:39,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:39,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:39,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:39,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859100982] [2024-06-14 13:54:39,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859100982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:39,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:39,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:39,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759410875] [2024-06-14 13:54:39,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:39,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:39,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:39,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:39,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:39,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:39,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 377 transitions, 5361 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:39,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:39,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:39,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:40,288 INFO L124 PetriNetUnfolderBase]: 1666/2809 cut-off events. [2024-06-14 13:54:40,288 INFO L125 PetriNetUnfolderBase]: For 138265/138265 co-relation queries the response was YES. [2024-06-14 13:54:40,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19212 conditions, 2809 events. 1666/2809 cut-off events. For 138265/138265 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 16442 event pairs, 306 based on Foata normal form. 1/2810 useless extension candidates. Maximal degree in co-relation 19089. Up to 2319 conditions per place. [2024-06-14 13:54:40,318 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 160 changer transitions 0/413 dead transitions. [2024-06-14 13:54:40,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 413 transitions, 6430 flow [2024-06-14 13:54:40,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:54:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:54:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-06-14 13:54:40,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:54:40,319 INFO L175 Difference]: Start difference. First operand has 308 places, 377 transitions, 5361 flow. Second operand 12 states and 256 transitions. [2024-06-14 13:54:40,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 413 transitions, 6430 flow [2024-06-14 13:54:40,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 413 transitions, 6126 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:54:40,730 INFO L231 Difference]: Finished difference. Result has 310 places, 380 transitions, 5432 flow [2024-06-14 13:54:40,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5432, PETRI_PLACES=310, PETRI_TRANSITIONS=380} [2024-06-14 13:54:40,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-14 13:54:40,730 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 380 transitions, 5432 flow [2024-06-14 13:54:40,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:40,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:40,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:40,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:54:40,731 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:40,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:40,731 INFO L85 PathProgramCache]: Analyzing trace with hash 497916084, now seen corresponding path program 18 times [2024-06-14 13:54:40,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:40,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670625744] [2024-06-14 13:54:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:40,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:40,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:41,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:41,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670625744] [2024-06-14 13:54:41,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670625744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:41,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:41,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:54:41,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872049817] [2024-06-14 13:54:41,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:41,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:54:41,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:54:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:54:41,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:41,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 380 transitions, 5432 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:41,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:41,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:41,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:41,586 INFO L124 PetriNetUnfolderBase]: 1663/2805 cut-off events. [2024-06-14 13:54:41,586 INFO L125 PetriNetUnfolderBase]: For 140212/140212 co-relation queries the response was YES. [2024-06-14 13:54:41,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19214 conditions, 2805 events. 1663/2805 cut-off events. For 140212/140212 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 16464 event pairs, 306 based on Foata normal form. 1/2806 useless extension candidates. Maximal degree in co-relation 19089. Up to 2316 conditions per place. [2024-06-14 13:54:41,617 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 245 selfloop transitions, 162 changer transitions 0/413 dead transitions. [2024-06-14 13:54:41,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 413 transitions, 6332 flow [2024-06-14 13:54:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:54:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:54:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 271 transitions. [2024-06-14 13:54:41,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084427767354597 [2024-06-14 13:54:41,618 INFO L175 Difference]: Start difference. First operand has 310 places, 380 transitions, 5432 flow. Second operand 13 states and 271 transitions. [2024-06-14 13:54:41,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 413 transitions, 6332 flow [2024-06-14 13:54:42,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 413 transitions, 5909 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-14 13:54:42,104 INFO L231 Difference]: Finished difference. Result has 312 places, 380 transitions, 5343 flow [2024-06-14 13:54:42,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5009, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5343, PETRI_PLACES=312, PETRI_TRANSITIONS=380} [2024-06-14 13:54:42,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-14 13:54:42,104 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 380 transitions, 5343 flow [2024-06-14 13:54:42,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:42,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:42,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:42,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:54:42,104 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:42,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:42,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1371040888, now seen corresponding path program 1 times [2024-06-14 13:54:42,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:42,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460995036] [2024-06-14 13:54:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:42,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:42,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:42,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460995036] [2024-06-14 13:54:42,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460995036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:42,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:42,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:42,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287228705] [2024-06-14 13:54:42,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:42,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:42,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:42,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:42,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:42,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 380 transitions, 5343 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:42,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:42,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:42,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:42,844 INFO L124 PetriNetUnfolderBase]: 1716/2891 cut-off events. [2024-06-14 13:54:42,844 INFO L125 PetriNetUnfolderBase]: For 161726/161726 co-relation queries the response was YES. [2024-06-14 13:54:42,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19960 conditions, 2891 events. 1716/2891 cut-off events. For 161726/161726 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 17050 event pairs, 317 based on Foata normal form. 6/2897 useless extension candidates. Maximal degree in co-relation 19835. Up to 2419 conditions per place. [2024-06-14 13:54:42,875 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 362 selfloop transitions, 51 changer transitions 0/419 dead transitions. [2024-06-14 13:54:42,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 419 transitions, 6495 flow [2024-06-14 13:54:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:42,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:54:42,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:54:42,876 INFO L175 Difference]: Start difference. First operand has 312 places, 380 transitions, 5343 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:54:42,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 419 transitions, 6495 flow [2024-06-14 13:54:43,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 419 transitions, 6113 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-14 13:54:43,304 INFO L231 Difference]: Finished difference. Result has 308 places, 385 transitions, 5157 flow [2024-06-14 13:54:43,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4963, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5157, PETRI_PLACES=308, PETRI_TRANSITIONS=385} [2024-06-14 13:54:43,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-14 13:54:43,305 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 385 transitions, 5157 flow [2024-06-14 13:54:43,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:43,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:43,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:43,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:54:43,305 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:43,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:43,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1282475128, now seen corresponding path program 2 times [2024-06-14 13:54:43,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:43,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248820551] [2024-06-14 13:54:43,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:43,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:43,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:43,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248820551] [2024-06-14 13:54:43,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248820551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:43,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:43,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:43,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116296258] [2024-06-14 13:54:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:43,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:43,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:43,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:43,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:43,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 385 transitions, 5157 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:43,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:43,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:43,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:44,067 INFO L124 PetriNetUnfolderBase]: 1782/2998 cut-off events. [2024-06-14 13:54:44,067 INFO L125 PetriNetUnfolderBase]: For 178627/178627 co-relation queries the response was YES. [2024-06-14 13:54:44,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20947 conditions, 2998 events. 1782/2998 cut-off events. For 178627/178627 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 17777 event pairs, 335 based on Foata normal form. 6/3004 useless extension candidates. Maximal degree in co-relation 20820. Up to 2591 conditions per place. [2024-06-14 13:54:44,100 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 359 selfloop transitions, 50 changer transitions 0/415 dead transitions. [2024-06-14 13:54:44,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 415 transitions, 6250 flow [2024-06-14 13:54:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:44,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:54:44,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 13:54:44,101 INFO L175 Difference]: Start difference. First operand has 308 places, 385 transitions, 5157 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:54:44,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 415 transitions, 6250 flow [2024-06-14 13:54:44,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 415 transitions, 6175 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 13:54:44,651 INFO L231 Difference]: Finished difference. Result has 314 places, 388 transitions, 5234 flow [2024-06-14 13:54:44,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5234, PETRI_PLACES=314, PETRI_TRANSITIONS=388} [2024-06-14 13:54:44,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-14 13:54:44,652 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 388 transitions, 5234 flow [2024-06-14 13:54:44,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:44,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:44,652 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] [2024-06-14 13:54:44,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:54:44,652 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:44,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1846818532, now seen corresponding path program 3 times [2024-06-14 13:54:44,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:44,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295062686] [2024-06-14 13:54:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:44,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:44,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:44,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295062686] [2024-06-14 13:54:44,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295062686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:44,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:44,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:44,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320394482] [2024-06-14 13:54:44,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:44,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:44,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:44,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:44,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:44,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:44,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 388 transitions, 5234 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:44,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:44,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:44,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:45,421 INFO L124 PetriNetUnfolderBase]: 1764/2972 cut-off events. [2024-06-14 13:54:45,421 INFO L125 PetriNetUnfolderBase]: For 171741/171741 co-relation queries the response was YES. [2024-06-14 13:54:45,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20510 conditions, 2972 events. 1764/2972 cut-off events. For 171741/171741 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 17587 event pairs, 333 based on Foata normal form. 8/2980 useless extension candidates. Maximal degree in co-relation 20380. Up to 2613 conditions per place. [2024-06-14 13:54:45,454 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 357 selfloop transitions, 49 changer transitions 0/412 dead transitions. [2024-06-14 13:54:45,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 412 transitions, 6154 flow [2024-06-14 13:54:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-14 13:54:45,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-14 13:54:45,457 INFO L175 Difference]: Start difference. First operand has 314 places, 388 transitions, 5234 flow. Second operand 8 states and 173 transitions. [2024-06-14 13:54:45,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 412 transitions, 6154 flow [2024-06-14 13:54:46,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 412 transitions, 6073 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:54:46,119 INFO L231 Difference]: Finished difference. Result has 318 places, 389 transitions, 5278 flow [2024-06-14 13:54:46,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5161, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5278, PETRI_PLACES=318, PETRI_TRANSITIONS=389} [2024-06-14 13:54:46,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 13:54:46,119 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 389 transitions, 5278 flow [2024-06-14 13:54:46,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:46,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:46,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:46,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:54:46,120 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:46,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:46,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1997905904, now seen corresponding path program 4 times [2024-06-14 13:54:46,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:46,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138075776] [2024-06-14 13:54:46,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:46,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:46,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:46,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:46,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138075776] [2024-06-14 13:54:46,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138075776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:46,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:46,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:46,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001706433] [2024-06-14 13:54:46,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:46,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:46,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:46,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:46,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:46,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:46,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 389 transitions, 5278 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:46,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:46,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:46,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:46,938 INFO L124 PetriNetUnfolderBase]: 1792/3016 cut-off events. [2024-06-14 13:54:46,938 INFO L125 PetriNetUnfolderBase]: For 176406/176406 co-relation queries the response was YES. [2024-06-14 13:54:46,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20870 conditions, 3016 events. 1792/3016 cut-off events. For 176406/176406 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 17921 event pairs, 337 based on Foata normal form. 8/3024 useless extension candidates. Maximal degree in co-relation 20738. Up to 2684 conditions per place. [2024-06-14 13:54:46,973 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 373 selfloop transitions, 33 changer transitions 0/412 dead transitions. [2024-06-14 13:54:46,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 412 transitions, 6193 flow [2024-06-14 13:54:46,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:46,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:46,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-14 13:54:46,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4926829268292683 [2024-06-14 13:54:46,974 INFO L175 Difference]: Start difference. First operand has 318 places, 389 transitions, 5278 flow. Second operand 10 states and 202 transitions. [2024-06-14 13:54:46,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 412 transitions, 6193 flow [2024-06-14 13:54:47,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 412 transitions, 6098 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:47,534 INFO L231 Difference]: Finished difference. Result has 322 places, 390 transitions, 5275 flow [2024-06-14 13:54:47,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5183, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5275, PETRI_PLACES=322, PETRI_TRANSITIONS=390} [2024-06-14 13:54:47,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-14 13:54:47,534 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 390 transitions, 5275 flow [2024-06-14 13:54:47,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:47,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:47,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:47,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:54:47,535 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:47,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:47,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1125877506, now seen corresponding path program 5 times [2024-06-14 13:54:47,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:47,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257034702] [2024-06-14 13:54:47,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:47,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:47,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:47,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257034702] [2024-06-14 13:54:47,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257034702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:47,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:47,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:47,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901178864] [2024-06-14 13:54:47,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:47,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:47,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:47,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:47,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 390 transitions, 5275 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:47,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:47,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:47,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:48,371 INFO L124 PetriNetUnfolderBase]: 1820/3064 cut-off events. [2024-06-14 13:54:48,371 INFO L125 PetriNetUnfolderBase]: For 182181/182181 co-relation queries the response was YES. [2024-06-14 13:54:48,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21268 conditions, 3064 events. 1820/3064 cut-off events. For 182181/182181 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 18289 event pairs, 343 based on Foata normal form. 8/3072 useless extension candidates. Maximal degree in co-relation 21135. Up to 2728 conditions per place. [2024-06-14 13:54:48,403 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 373 selfloop transitions, 32 changer transitions 0/411 dead transitions. [2024-06-14 13:54:48,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 411 transitions, 6186 flow [2024-06-14 13:54:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 13:54:48,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 13:54:48,404 INFO L175 Difference]: Start difference. First operand has 322 places, 390 transitions, 5275 flow. Second operand 8 states and 170 transitions. [2024-06-14 13:54:48,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 411 transitions, 6186 flow [2024-06-14 13:54:49,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 411 transitions, 6113 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:49,063 INFO L231 Difference]: Finished difference. Result has 322 places, 391 transitions, 5294 flow [2024-06-14 13:54:49,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5202, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5294, PETRI_PLACES=322, PETRI_TRANSITIONS=391} [2024-06-14 13:54:49,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-14 13:54:49,063 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 391 transitions, 5294 flow [2024-06-14 13:54:49,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:49,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:49,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:49,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:54:49,064 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:49,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:49,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1125729636, now seen corresponding path program 6 times [2024-06-14 13:54:49,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:49,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28012221] [2024-06-14 13:54:49,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:49,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:49,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:49,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28012221] [2024-06-14 13:54:49,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28012221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:49,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:49,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:49,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613095044] [2024-06-14 13:54:49,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:49,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:49,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:49,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:49,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:49,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:49,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 391 transitions, 5294 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:49,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:49,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:49,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:49,872 INFO L124 PetriNetUnfolderBase]: 1840/3096 cut-off events. [2024-06-14 13:54:49,872 INFO L125 PetriNetUnfolderBase]: For 183220/183220 co-relation queries the response was YES. [2024-06-14 13:54:49,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21540 conditions, 3096 events. 1840/3096 cut-off events. For 183220/183220 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 18451 event pairs, 341 based on Foata normal form. 6/3102 useless extension candidates. Maximal degree in co-relation 21406. Up to 2698 conditions per place. [2024-06-14 13:54:49,909 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 376 selfloop transitions, 35 changer transitions 0/417 dead transitions. [2024-06-14 13:54:49,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 417 transitions, 6269 flow [2024-06-14 13:54:49,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 13:54:49,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:54:49,910 INFO L175 Difference]: Start difference. First operand has 322 places, 391 transitions, 5294 flow. Second operand 8 states and 172 transitions. [2024-06-14 13:54:49,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 417 transitions, 6269 flow [2024-06-14 13:54:50,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 417 transitions, 6196 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:50,535 INFO L231 Difference]: Finished difference. Result has 325 places, 394 transitions, 5361 flow [2024-06-14 13:54:50,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5221, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5361, PETRI_PLACES=325, PETRI_TRANSITIONS=394} [2024-06-14 13:54:50,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-14 13:54:50,535 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 394 transitions, 5361 flow [2024-06-14 13:54:50,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:50,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:50,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:50,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:54:50,535 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:50,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1997690702, now seen corresponding path program 1 times [2024-06-14 13:54:50,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:50,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717703942] [2024-06-14 13:54:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:50,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:50,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:50,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717703942] [2024-06-14 13:54:50,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717703942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:50,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:50,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:50,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007025717] [2024-06-14 13:54:50,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:50,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:50,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:50,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:50,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:50,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:50,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 394 transitions, 5361 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:50,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:50,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:50,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:51,550 INFO L124 PetriNetUnfolderBase]: 1860/3132 cut-off events. [2024-06-14 13:54:51,551 INFO L125 PetriNetUnfolderBase]: For 188574/188574 co-relation queries the response was YES. [2024-06-14 13:54:51,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21825 conditions, 3132 events. 1860/3132 cut-off events. For 188574/188574 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 18729 event pairs, 347 based on Foata normal form. 6/3138 useless extension candidates. Maximal degree in co-relation 21689. Up to 2730 conditions per place. [2024-06-14 13:54:51,589 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 377 selfloop transitions, 37 changer transitions 0/420 dead transitions. [2024-06-14 13:54:51,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 420 transitions, 6309 flow [2024-06-14 13:54:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-14 13:54:51,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-14 13:54:51,590 INFO L175 Difference]: Start difference. First operand has 325 places, 394 transitions, 5361 flow. Second operand 10 states and 204 transitions. [2024-06-14 13:54:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 420 transitions, 6309 flow [2024-06-14 13:54:52,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 420 transitions, 6249 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:54:52,279 INFO L231 Difference]: Finished difference. Result has 331 places, 395 transitions, 5397 flow [2024-06-14 13:54:52,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5301, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5397, PETRI_PLACES=331, PETRI_TRANSITIONS=395} [2024-06-14 13:54:52,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-14 13:54:52,279 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 395 transitions, 5397 flow [2024-06-14 13:54:52,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:52,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:52,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:52,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:54:52,279 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:52,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:52,280 INFO L85 PathProgramCache]: Analyzing trace with hash 911350624, now seen corresponding path program 7 times [2024-06-14 13:54:52,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:52,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36636669] [2024-06-14 13:54:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:52,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:52,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:52,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36636669] [2024-06-14 13:54:52,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36636669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:52,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:52,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641492403] [2024-06-14 13:54:52,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:52,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:52,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:52,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:52,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:52,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:52,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 395 transitions, 5397 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:52,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:52,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:52,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:53,117 INFO L124 PetriNetUnfolderBase]: 1888/3177 cut-off events. [2024-06-14 13:54:53,117 INFO L125 PetriNetUnfolderBase]: For 200173/200175 co-relation queries the response was YES. [2024-06-14 13:54:53,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22275 conditions, 3177 events. 1888/3177 cut-off events. For 200173/200175 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 19098 event pairs, 362 based on Foata normal form. 10/3187 useless extension candidates. Maximal degree in co-relation 22137. Up to 2815 conditions per place. [2024-06-14 13:54:53,157 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 365 selfloop transitions, 46 changer transitions 0/417 dead transitions. [2024-06-14 13:54:53,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 417 transitions, 6326 flow [2024-06-14 13:54:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 13:54:53,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013550135501355 [2024-06-14 13:54:53,159 INFO L175 Difference]: Start difference. First operand has 331 places, 395 transitions, 5397 flow. Second operand 9 states and 185 transitions. [2024-06-14 13:54:53,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 417 transitions, 6326 flow [2024-06-14 13:54:53,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 417 transitions, 6242 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:53,974 INFO L231 Difference]: Finished difference. Result has 332 places, 396 transitions, 5437 flow [2024-06-14 13:54:53,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5437, PETRI_PLACES=332, PETRI_TRANSITIONS=396} [2024-06-14 13:54:53,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-14 13:54:53,975 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 396 transitions, 5437 flow [2024-06-14 13:54:53,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:53,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:53,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:53,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:54:53,975 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:53,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:53,975 INFO L85 PathProgramCache]: Analyzing trace with hash 717411214, now seen corresponding path program 8 times [2024-06-14 13:54:53,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:53,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369298280] [2024-06-14 13:54:53,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:53,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:54,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:54,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369298280] [2024-06-14 13:54:54,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369298280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:54,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:54,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:54,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393879543] [2024-06-14 13:54:54,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:54,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:54,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:54,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:54,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 396 transitions, 5437 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:54,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:54,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:54,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:54,810 INFO L124 PetriNetUnfolderBase]: 1916/3220 cut-off events. [2024-06-14 13:54:54,810 INFO L125 PetriNetUnfolderBase]: For 205553/205553 co-relation queries the response was YES. [2024-06-14 13:54:54,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22675 conditions, 3220 events. 1916/3220 cut-off events. For 205553/205553 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 19384 event pairs, 361 based on Foata normal form. 8/3228 useless extension candidates. Maximal degree in co-relation 22536. Up to 2827 conditions per place. [2024-06-14 13:54:54,846 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 367 selfloop transitions, 48 changer transitions 0/421 dead transitions. [2024-06-14 13:54:54,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 421 transitions, 6384 flow [2024-06-14 13:54:54,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 13:54:54,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-14 13:54:54,847 INFO L175 Difference]: Start difference. First operand has 332 places, 396 transitions, 5437 flow. Second operand 9 states and 190 transitions. [2024-06-14 13:54:54,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 421 transitions, 6384 flow [2024-06-14 13:54:55,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 421 transitions, 6279 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:55,531 INFO L231 Difference]: Finished difference. Result has 334 places, 397 transitions, 5465 flow [2024-06-14 13:54:55,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5465, PETRI_PLACES=334, PETRI_TRANSITIONS=397} [2024-06-14 13:54:55,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-14 13:54:55,532 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 397 transitions, 5465 flow [2024-06-14 13:54:55,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:55,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:55,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:55,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:54:55,532 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:55,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:55,533 INFO L85 PathProgramCache]: Analyzing trace with hash 712048834, now seen corresponding path program 9 times [2024-06-14 13:54:55,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:55,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684969885] [2024-06-14 13:54:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:55,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:55,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:55,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684969885] [2024-06-14 13:54:55,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684969885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:55,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:55,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:55,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340613331] [2024-06-14 13:54:55,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:55,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:55,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:55,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 397 transitions, 5465 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:55,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:55,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:55,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:56,353 INFO L124 PetriNetUnfolderBase]: 1931/3249 cut-off events. [2024-06-14 13:54:56,353 INFO L125 PetriNetUnfolderBase]: For 206386/206386 co-relation queries the response was YES. [2024-06-14 13:54:56,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22776 conditions, 3249 events. 1931/3249 cut-off events. For 206386/206386 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 19579 event pairs, 366 based on Foata normal form. 8/3257 useless extension candidates. Maximal degree in co-relation 22636. Up to 2852 conditions per place. [2024-06-14 13:54:56,390 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 368 selfloop transitions, 46 changer transitions 0/420 dead transitions. [2024-06-14 13:54:56,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 420 transitions, 6408 flow [2024-06-14 13:54:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:56,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:56,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 13:54:56,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 13:54:56,391 INFO L175 Difference]: Start difference. First operand has 334 places, 397 transitions, 5465 flow. Second operand 7 states and 156 transitions. [2024-06-14 13:54:56,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 420 transitions, 6408 flow [2024-06-14 13:54:57,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 420 transitions, 6304 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:57,104 INFO L231 Difference]: Finished difference. Result has 334 places, 398 transitions, 5492 flow [2024-06-14 13:54:57,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5361, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5492, PETRI_PLACES=334, PETRI_TRANSITIONS=398} [2024-06-14 13:54:57,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-14 13:54:57,104 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 398 transitions, 5492 flow [2024-06-14 13:54:57,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:57,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:57,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:57,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:54:57,105 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:57,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:57,105 INFO L85 PathProgramCache]: Analyzing trace with hash 492651912, now seen corresponding path program 10 times [2024-06-14 13:54:57,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:57,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170845929] [2024-06-14 13:54:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:57,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:57,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170845929] [2024-06-14 13:54:57,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170845929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:57,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:57,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:57,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507063268] [2024-06-14 13:54:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:57,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:57,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:57,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:57,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:57,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 398 transitions, 5492 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:57,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:57,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:57,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:57,930 INFO L124 PetriNetUnfolderBase]: 1918/3225 cut-off events. [2024-06-14 13:54:57,930 INFO L125 PetriNetUnfolderBase]: For 190227/190227 co-relation queries the response was YES. [2024-06-14 13:54:57,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22219 conditions, 3225 events. 1918/3225 cut-off events. For 190227/190227 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 19398 event pairs, 339 based on Foata normal form. 6/3231 useless extension candidates. Maximal degree in co-relation 22078. Up to 2659 conditions per place. [2024-06-14 13:54:57,969 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 368 selfloop transitions, 54 changer transitions 0/428 dead transitions. [2024-06-14 13:54:57,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 428 transitions, 6488 flow [2024-06-14 13:54:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:57,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:57,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:54:57,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 13:54:57,970 INFO L175 Difference]: Start difference. First operand has 334 places, 398 transitions, 5492 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:54:57,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 428 transitions, 6488 flow [2024-06-14 13:54:58,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 428 transitions, 6370 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:58,639 INFO L231 Difference]: Finished difference. Result has 337 places, 400 transitions, 5551 flow [2024-06-14 13:54:58,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5382, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5551, PETRI_PLACES=337, PETRI_TRANSITIONS=400} [2024-06-14 13:54:58,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 13:54:58,639 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 400 transitions, 5551 flow [2024-06-14 13:54:58,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:58,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:58,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:58,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:54:58,640 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:58,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:58,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1026621578, now seen corresponding path program 2 times [2024-06-14 13:54:58,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:58,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632520690] [2024-06-14 13:54:58,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:58,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:58,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:58,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632520690] [2024-06-14 13:54:58,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632520690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:58,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:58,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:58,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636314322] [2024-06-14 13:54:58,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:58,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:58,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:58,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:58,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:58,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:58,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 400 transitions, 5551 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:58,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:58,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:58,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:59,495 INFO L124 PetriNetUnfolderBase]: 1938/3267 cut-off events. [2024-06-14 13:54:59,496 INFO L125 PetriNetUnfolderBase]: For 195189/195191 co-relation queries the response was YES. [2024-06-14 13:54:59,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22490 conditions, 3267 events. 1938/3267 cut-off events. For 195189/195191 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19765 event pairs, 364 based on Foata normal form. 8/3275 useless extension candidates. Maximal degree in co-relation 22347. Up to 2867 conditions per place. [2024-06-14 13:54:59,535 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 371 selfloop transitions, 49 changer transitions 0/426 dead transitions. [2024-06-14 13:54:59,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 426 transitions, 6513 flow [2024-06-14 13:54:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:59,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-14 13:54:59,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-14 13:54:59,536 INFO L175 Difference]: Start difference. First operand has 337 places, 400 transitions, 5551 flow. Second operand 10 states and 204 transitions. [2024-06-14 13:54:59,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 426 transitions, 6513 flow [2024-06-14 13:55:00,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 426 transitions, 6348 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:00,229 INFO L231 Difference]: Finished difference. Result has 340 places, 401 transitions, 5508 flow [2024-06-14 13:55:00,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5386, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5508, PETRI_PLACES=340, PETRI_TRANSITIONS=401} [2024-06-14 13:55:00,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-14 13:55:00,229 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 401 transitions, 5508 flow [2024-06-14 13:55:00,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:00,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:00,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:00,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:55:00,230 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:00,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:00,230 INFO L85 PathProgramCache]: Analyzing trace with hash -760924298, now seen corresponding path program 3 times [2024-06-14 13:55:00,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:00,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852966298] [2024-06-14 13:55:00,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:00,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:00,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:00,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852966298] [2024-06-14 13:55:00,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852966298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:00,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:00,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:00,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926602144] [2024-06-14 13:55:00,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:00,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:00,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:00,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:00,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:00,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 401 transitions, 5508 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:00,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:00,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:00,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:01,075 INFO L124 PetriNetUnfolderBase]: 1958/3295 cut-off events. [2024-06-14 13:55:01,075 INFO L125 PetriNetUnfolderBase]: For 194320/194322 co-relation queries the response was YES. [2024-06-14 13:55:01,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22405 conditions, 3295 events. 1958/3295 cut-off events. For 194320/194322 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19916 event pairs, 360 based on Foata normal form. 8/3303 useless extension candidates. Maximal degree in co-relation 22263. Up to 2660 conditions per place. [2024-06-14 13:55:01,114 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 362 selfloop transitions, 60 changer transitions 0/428 dead transitions. [2024-06-14 13:55:01,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 428 transitions, 6624 flow [2024-06-14 13:55:01,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:01,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 13:55:01,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:55:01,115 INFO L175 Difference]: Start difference. First operand has 340 places, 401 transitions, 5508 flow. Second operand 9 states and 189 transitions. [2024-06-14 13:55:01,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 428 transitions, 6624 flow [2024-06-14 13:55:02,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 428 transitions, 6514 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:02,023 INFO L231 Difference]: Finished difference. Result has 341 places, 402 transitions, 5542 flow [2024-06-14 13:55:02,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5398, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5542, PETRI_PLACES=341, PETRI_TRANSITIONS=402} [2024-06-14 13:55:02,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-14 13:55:02,023 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 402 transitions, 5542 flow [2024-06-14 13:55:02,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:02,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:02,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:02,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:55:02,023 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:02,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:02,024 INFO L85 PathProgramCache]: Analyzing trace with hash 498377364, now seen corresponding path program 4 times [2024-06-14 13:55:02,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:02,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747110147] [2024-06-14 13:55:02,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:02,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:02,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:02,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747110147] [2024-06-14 13:55:02,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747110147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:02,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:02,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:02,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421857635] [2024-06-14 13:55:02,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:02,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:02,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:02,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:02,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 402 transitions, 5542 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:02,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:02,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:02,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:02,897 INFO L124 PetriNetUnfolderBase]: 1945/3275 cut-off events. [2024-06-14 13:55:02,898 INFO L125 PetriNetUnfolderBase]: For 181848/181848 co-relation queries the response was YES. [2024-06-14 13:55:02,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21964 conditions, 3275 events. 1945/3275 cut-off events. For 181848/181848 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19777 event pairs, 352 based on Foata normal form. 6/3281 useless extension candidates. Maximal degree in co-relation 21821. Up to 2754 conditions per place. [2024-06-14 13:55:02,937 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 367 selfloop transitions, 56 changer transitions 0/429 dead transitions. [2024-06-14 13:55:02,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 429 transitions, 6498 flow [2024-06-14 13:55:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:02,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:02,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 13:55:02,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:55:02,938 INFO L175 Difference]: Start difference. First operand has 341 places, 402 transitions, 5542 flow. Second operand 9 states and 192 transitions. [2024-06-14 13:55:02,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 429 transitions, 6498 flow [2024-06-14 13:55:03,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 429 transitions, 6389 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:03,827 INFO L231 Difference]: Finished difference. Result has 344 places, 402 transitions, 5551 flow [2024-06-14 13:55:03,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5433, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5551, PETRI_PLACES=344, PETRI_TRANSITIONS=402} [2024-06-14 13:55:03,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-14 13:55:03,827 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 402 transitions, 5551 flow [2024-06-14 13:55:03,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:03,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:03,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:03,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:55:03,827 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:03,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash -737770862, now seen corresponding path program 1 times [2024-06-14 13:55:03,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:03,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434111105] [2024-06-14 13:55:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:03,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:04,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:04,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434111105] [2024-06-14 13:55:04,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434111105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:04,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:04,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:55:04,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851577987] [2024-06-14 13:55:04,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:04,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:55:04,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:55:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:55:04,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:04,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 402 transitions, 5551 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:04,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:04,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:04,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:04,767 INFO L124 PetriNetUnfolderBase]: 2009/3387 cut-off events. [2024-06-14 13:55:04,767 INFO L125 PetriNetUnfolderBase]: For 176358/176358 co-relation queries the response was YES. [2024-06-14 13:55:04,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22772 conditions, 3387 events. 2009/3387 cut-off events. For 176358/176358 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 20675 event pairs, 380 based on Foata normal form. 1/3387 useless extension candidates. Maximal degree in co-relation 22628. Up to 2861 conditions per place. [2024-06-14 13:55:04,808 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 313 selfloop transitions, 135 changer transitions 0/454 dead transitions. [2024-06-14 13:55:04,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 454 transitions, 7120 flow [2024-06-14 13:55:04,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:55:04,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 13:55:04,809 INFO L175 Difference]: Start difference. First operand has 344 places, 402 transitions, 5551 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:55:04,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 454 transitions, 7120 flow [2024-06-14 13:55:05,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 454 transitions, 6934 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:05,730 INFO L231 Difference]: Finished difference. Result has 345 places, 433 transitions, 6225 flow [2024-06-14 13:55:05,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6225, PETRI_PLACES=345, PETRI_TRANSITIONS=433} [2024-06-14 13:55:05,730 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-14 13:55:05,730 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 433 transitions, 6225 flow [2024-06-14 13:55:05,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:05,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:05,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:05,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:55:05,731 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:05,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:05,731 INFO L85 PathProgramCache]: Analyzing trace with hash -686402856, now seen corresponding path program 2 times [2024-06-14 13:55:05,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:05,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226207005] [2024-06-14 13:55:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:05,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:06,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226207005] [2024-06-14 13:55:06,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226207005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:06,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:06,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:06,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774897009] [2024-06-14 13:55:06,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:06,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:06,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:06,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:06,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 433 transitions, 6225 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:06,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:06,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:06,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:06,685 INFO L124 PetriNetUnfolderBase]: 2022/3409 cut-off events. [2024-06-14 13:55:06,685 INFO L125 PetriNetUnfolderBase]: For 181416/181416 co-relation queries the response was YES. [2024-06-14 13:55:06,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23365 conditions, 3409 events. 2022/3409 cut-off events. For 181416/181416 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 20836 event pairs, 380 based on Foata normal form. 1/3409 useless extension candidates. Maximal degree in co-relation 23219. Up to 2956 conditions per place. [2024-06-14 13:55:06,727 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 97 changer transitions 0/458 dead transitions. [2024-06-14 13:55:06,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 458 transitions, 7468 flow [2024-06-14 13:55:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:55:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:55:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-14 13:55:06,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-14 13:55:06,728 INFO L175 Difference]: Start difference. First operand has 345 places, 433 transitions, 6225 flow. Second operand 10 states and 216 transitions. [2024-06-14 13:55:06,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 458 transitions, 7468 flow [2024-06-14 13:55:07,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 458 transitions, 7310 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 13:55:07,737 INFO L231 Difference]: Finished difference. Result has 352 places, 440 transitions, 6444 flow [2024-06-14 13:55:07,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6085, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6444, PETRI_PLACES=352, PETRI_TRANSITIONS=440} [2024-06-14 13:55:07,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 13:55:07,737 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 440 transitions, 6444 flow [2024-06-14 13:55:07,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:07,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:07,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:07,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:55:07,738 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:07,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:07,738 INFO L85 PathProgramCache]: Analyzing trace with hash -247206962, now seen corresponding path program 3 times [2024-06-14 13:55:07,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:07,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202564196] [2024-06-14 13:55:07,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:07,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:08,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:08,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202564196] [2024-06-14 13:55:08,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202564196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:08,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:08,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:08,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258412510] [2024-06-14 13:55:08,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:08,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:08,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:08,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:08,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:08,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 440 transitions, 6444 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:08,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:08,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:08,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:08,668 INFO L124 PetriNetUnfolderBase]: 2019/3405 cut-off events. [2024-06-14 13:55:08,669 INFO L125 PetriNetUnfolderBase]: For 178742/178742 co-relation queries the response was YES. [2024-06-14 13:55:08,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23421 conditions, 3405 events. 2019/3405 cut-off events. For 178742/178742 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 20825 event pairs, 380 based on Foata normal form. 1/3405 useless extension candidates. Maximal degree in co-relation 23272. Up to 2953 conditions per place. [2024-06-14 13:55:08,711 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 94 changer transitions 0/455 dead transitions. [2024-06-14 13:55:08,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 455 transitions, 7378 flow [2024-06-14 13:55:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:55:08,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:55:08,712 INFO L175 Difference]: Start difference. First operand has 352 places, 440 transitions, 6444 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:55:08,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 455 transitions, 7378 flow [2024-06-14 13:55:09,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 455 transitions, 7263 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 13:55:09,691 INFO L231 Difference]: Finished difference. Result has 356 places, 440 transitions, 6531 flow [2024-06-14 13:55:09,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6329, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6531, PETRI_PLACES=356, PETRI_TRANSITIONS=440} [2024-06-14 13:55:09,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-14 13:55:09,691 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 440 transitions, 6531 flow [2024-06-14 13:55:09,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:09,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:09,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:09,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:55:09,692 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:09,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:09,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1795217716, now seen corresponding path program 4 times [2024-06-14 13:55:09,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:09,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739618193] [2024-06-14 13:55:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:09,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:09,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:09,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739618193] [2024-06-14 13:55:09,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739618193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:09,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:09,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:09,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090488536] [2024-06-14 13:55:09,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:09,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:09,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:09,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:09,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:10,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:10,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 440 transitions, 6531 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:10,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:10,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:10,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:10,655 INFO L124 PetriNetUnfolderBase]: 2024/3414 cut-off events. [2024-06-14 13:55:10,655 INFO L125 PetriNetUnfolderBase]: For 182963/182963 co-relation queries the response was YES. [2024-06-14 13:55:10,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23706 conditions, 3414 events. 2024/3414 cut-off events. For 182963/182963 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 20859 event pairs, 380 based on Foata normal form. 1/3414 useless extension candidates. Maximal degree in co-relation 23555. Up to 2897 conditions per place. [2024-06-14 13:55:10,697 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 324 selfloop transitions, 132 changer transitions 0/462 dead transitions. [2024-06-14 13:55:10,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 462 transitions, 7715 flow [2024-06-14 13:55:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:55:10,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:55:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:55:10,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:55:10,698 INFO L175 Difference]: Start difference. First operand has 356 places, 440 transitions, 6531 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:55:10,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 462 transitions, 7715 flow [2024-06-14 13:55:11,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 462 transitions, 7527 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:11,687 INFO L231 Difference]: Finished difference. Result has 357 places, 444 transitions, 6779 flow [2024-06-14 13:55:11,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6779, PETRI_PLACES=357, PETRI_TRANSITIONS=444} [2024-06-14 13:55:11,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 13:55:11,688 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 444 transitions, 6779 flow [2024-06-14 13:55:11,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:11,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:11,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:11,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:55:11,688 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:11,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash 769919996, now seen corresponding path program 5 times [2024-06-14 13:55:11,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:11,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779490839] [2024-06-14 13:55:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:11,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:11,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779490839] [2024-06-14 13:55:11,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779490839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:11,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:11,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:11,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304198092] [2024-06-14 13:55:11,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:11,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:11,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:11,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:12,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:12,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 444 transitions, 6779 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:12,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:12,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:12,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:12,626 INFO L124 PetriNetUnfolderBase]: 2029/3423 cut-off events. [2024-06-14 13:55:12,627 INFO L125 PetriNetUnfolderBase]: For 188185/188185 co-relation queries the response was YES. [2024-06-14 13:55:12,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24106 conditions, 3423 events. 2029/3423 cut-off events. For 188185/188185 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 20997 event pairs, 380 based on Foata normal form. 1/3423 useless extension candidates. Maximal degree in co-relation 23953. Up to 2903 conditions per place. [2024-06-14 13:55:12,670 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 141 changer transitions 0/467 dead transitions. [2024-06-14 13:55:12,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 467 transitions, 7971 flow [2024-06-14 13:55:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 13:55:12,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-14 13:55:12,671 INFO L175 Difference]: Start difference. First operand has 357 places, 444 transitions, 6779 flow. Second operand 9 states and 202 transitions. [2024-06-14 13:55:12,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 467 transitions, 7971 flow [2024-06-14 13:55:13,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 467 transitions, 7661 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:13,854 INFO L231 Difference]: Finished difference. Result has 359 places, 447 transitions, 6847 flow [2024-06-14 13:55:13,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6477, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6847, PETRI_PLACES=359, PETRI_TRANSITIONS=447} [2024-06-14 13:55:13,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-14 13:55:13,855 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 447 transitions, 6847 flow [2024-06-14 13:55:13,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:13,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:13,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:13,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:55:13,855 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:13,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:13,855 INFO L85 PathProgramCache]: Analyzing trace with hash 777271646, now seen corresponding path program 6 times [2024-06-14 13:55:13,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:13,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739642971] [2024-06-14 13:55:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:13,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:14,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:14,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739642971] [2024-06-14 13:55:14,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739642971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:14,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:14,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:14,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545841211] [2024-06-14 13:55:14,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:14,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:14,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:14,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:14,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:14,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 447 transitions, 6847 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:14,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:14,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:14,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:14,797 INFO L124 PetriNetUnfolderBase]: 2026/3419 cut-off events. [2024-06-14 13:55:14,797 INFO L125 PetriNetUnfolderBase]: For 184949/184949 co-relation queries the response was YES. [2024-06-14 13:55:14,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23995 conditions, 3419 events. 2026/3419 cut-off events. For 184949/184949 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 20935 event pairs, 380 based on Foata normal form. 1/3419 useless extension candidates. Maximal degree in co-relation 23842. Up to 2900 conditions per place. [2024-06-14 13:55:14,839 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 141 changer transitions 0/467 dead transitions. [2024-06-14 13:55:14,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 467 transitions, 7817 flow [2024-06-14 13:55:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:55:14,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:55:14,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 13:55:14,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-14 13:55:14,840 INFO L175 Difference]: Start difference. First operand has 359 places, 447 transitions, 6847 flow. Second operand 10 states and 218 transitions. [2024-06-14 13:55:14,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 467 transitions, 7817 flow [2024-06-14 13:55:16,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 467 transitions, 7477 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:16,058 INFO L231 Difference]: Finished difference. Result has 361 places, 447 transitions, 6803 flow [2024-06-14 13:55:16,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6507, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6803, PETRI_PLACES=361, PETRI_TRANSITIONS=447} [2024-06-14 13:55:16,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-14 13:55:16,059 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 447 transitions, 6803 flow [2024-06-14 13:55:16,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:16,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:16,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:16,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:55:16,060 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:16,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:16,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1147183470, now seen corresponding path program 7 times [2024-06-14 13:55:16,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:16,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081708910] [2024-06-14 13:55:16,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:16,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:16,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:16,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081708910] [2024-06-14 13:55:16,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081708910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:16,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:16,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:16,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752111878] [2024-06-14 13:55:16,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:16,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:16,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:16,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:16,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:16,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:16,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 447 transitions, 6803 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:16,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:16,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:16,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:17,003 INFO L124 PetriNetUnfolderBase]: 2047/3454 cut-off events. [2024-06-14 13:55:17,003 INFO L125 PetriNetUnfolderBase]: For 191319/191319 co-relation queries the response was YES. [2024-06-14 13:55:17,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24377 conditions, 3454 events. 2047/3454 cut-off events. For 191319/191319 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 21208 event pairs, 380 based on Foata normal form. 1/3454 useless extension candidates. Maximal degree in co-relation 24224. Up to 2660 conditions per place. [2024-06-14 13:55:17,050 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 249 changer transitions 0/483 dead transitions. [2024-06-14 13:55:17,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 483 transitions, 8303 flow [2024-06-14 13:55:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:55:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:55:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-14 13:55:17,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-14 13:55:17,051 INFO L175 Difference]: Start difference. First operand has 361 places, 447 transitions, 6803 flow. Second operand 12 states and 254 transitions. [2024-06-14 13:55:17,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 483 transitions, 8303 flow [2024-06-14 13:55:18,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 483 transitions, 7960 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:18,351 INFO L231 Difference]: Finished difference. Result has 364 places, 456 transitions, 7148 flow [2024-06-14 13:55:18,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6464, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7148, PETRI_PLACES=364, PETRI_TRANSITIONS=456} [2024-06-14 13:55:18,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-14 13:55:18,352 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 456 transitions, 7148 flow [2024-06-14 13:55:18,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:18,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:18,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:18,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:55:18,352 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:18,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:18,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1711293496, now seen corresponding path program 8 times [2024-06-14 13:55:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:18,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136087079] [2024-06-14 13:55:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:18,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:18,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:18,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136087079] [2024-06-14 13:55:18,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136087079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:18,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:18,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:18,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679256406] [2024-06-14 13:55:18,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:18,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:18,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:18,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:18,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:18,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:18,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 456 transitions, 7148 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:18,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:18,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:18,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:19,282 INFO L124 PetriNetUnfolderBase]: 2052/3463 cut-off events. [2024-06-14 13:55:19,282 INFO L125 PetriNetUnfolderBase]: For 194214/194214 co-relation queries the response was YES. [2024-06-14 13:55:19,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24969 conditions, 3463 events. 2052/3463 cut-off events. For 194214/194214 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 21279 event pairs, 380 based on Foata normal form. 1/3463 useless extension candidates. Maximal degree in co-relation 24816. Up to 2666 conditions per place. [2024-06-14 13:55:19,328 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 216 selfloop transitions, 264 changer transitions 0/486 dead transitions. [2024-06-14 13:55:19,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 486 transitions, 8544 flow [2024-06-14 13:55:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:55:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:55:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-14 13:55:19,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-14 13:55:19,329 INFO L175 Difference]: Start difference. First operand has 364 places, 456 transitions, 7148 flow. Second operand 12 states and 254 transitions. [2024-06-14 13:55:19,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 486 transitions, 8544 flow [2024-06-14 13:55:20,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 486 transitions, 8009 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:20,635 INFO L231 Difference]: Finished difference. Result has 368 places, 459 transitions, 7211 flow [2024-06-14 13:55:20,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6641, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7211, PETRI_PLACES=368, PETRI_TRANSITIONS=459} [2024-06-14 13:55:20,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 13:55:20,636 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 459 transitions, 7211 flow [2024-06-14 13:55:20,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:20,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:20,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:20,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:55:20,636 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:20,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:20,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1143458820, now seen corresponding path program 9 times [2024-06-14 13:55:20,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:20,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631231760] [2024-06-14 13:55:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:20,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:20,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:20,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631231760] [2024-06-14 13:55:20,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631231760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:20,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:20,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:20,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65783579] [2024-06-14 13:55:20,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:20,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:20,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:20,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:20,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:20,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:20,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 459 transitions, 7211 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:20,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:20,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:20,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:21,633 INFO L124 PetriNetUnfolderBase]: 2065/3485 cut-off events. [2024-06-14 13:55:21,634 INFO L125 PetriNetUnfolderBase]: For 198691/198691 co-relation queries the response was YES. [2024-06-14 13:55:21,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24945 conditions, 3485 events. 2065/3485 cut-off events. For 198691/198691 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 21466 event pairs, 380 based on Foata normal form. 1/3485 useless extension candidates. Maximal degree in co-relation 24791. Up to 2962 conditions per place. [2024-06-14 13:55:21,675 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 362 selfloop transitions, 121 changer transitions 0/489 dead transitions. [2024-06-14 13:55:21,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 489 transitions, 8465 flow [2024-06-14 13:55:21,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:55:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:55:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 262 transitions. [2024-06-14 13:55:21,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4915572232645403 [2024-06-14 13:55:21,676 INFO L175 Difference]: Start difference. First operand has 368 places, 459 transitions, 7211 flow. Second operand 13 states and 262 transitions. [2024-06-14 13:55:21,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 489 transitions, 8465 flow [2024-06-14 13:55:23,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 489 transitions, 7871 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-14 13:55:23,096 INFO L231 Difference]: Finished difference. Result has 371 places, 465 transitions, 6947 flow [2024-06-14 13:55:23,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6947, PETRI_PLACES=371, PETRI_TRANSITIONS=465} [2024-06-14 13:55:23,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:55:23,097 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 465 transitions, 6947 flow [2024-06-14 13:55:23,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:23,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:23,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:23,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:55:23,097 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:23,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:23,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1143464400, now seen corresponding path program 10 times [2024-06-14 13:55:23,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:23,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348643753] [2024-06-14 13:55:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:23,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:23,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:23,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:23,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348643753] [2024-06-14 13:55:23,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348643753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:23,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:23,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:23,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969829701] [2024-06-14 13:55:23,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:23,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:23,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:23,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:23,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:23,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:23,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 465 transitions, 6947 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:23,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:23,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:23,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:24,060 INFO L124 PetriNetUnfolderBase]: 2062/3481 cut-off events. [2024-06-14 13:55:24,061 INFO L125 PetriNetUnfolderBase]: For 198727/198727 co-relation queries the response was YES. [2024-06-14 13:55:24,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24531 conditions, 3481 events. 2062/3481 cut-off events. For 198727/198727 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 21427 event pairs, 380 based on Foata normal form. 1/3481 useless extension candidates. Maximal degree in co-relation 24376. Up to 2959 conditions per place. [2024-06-14 13:55:24,110 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 360 selfloop transitions, 121 changer transitions 0/487 dead transitions. [2024-06-14 13:55:24,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 487 transitions, 7961 flow [2024-06-14 13:55:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:55:24,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:55:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-14 13:55:24,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49796747967479676 [2024-06-14 13:55:24,111 INFO L175 Difference]: Start difference. First operand has 371 places, 465 transitions, 6947 flow. Second operand 12 states and 245 transitions. [2024-06-14 13:55:24,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 487 transitions, 7961 flow [2024-06-14 13:55:25,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 487 transitions, 7770 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:25,392 INFO L231 Difference]: Finished difference. Result has 374 places, 465 transitions, 7004 flow [2024-06-14 13:55:25,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6756, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7004, PETRI_PLACES=374, PETRI_TRANSITIONS=465} [2024-06-14 13:55:25,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-14 13:55:25,393 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 465 transitions, 7004 flow [2024-06-14 13:55:25,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:25,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:25,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:25,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:55:25,393 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:25,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash -971695260, now seen corresponding path program 11 times [2024-06-14 13:55:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:25,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218522662] [2024-06-14 13:55:25,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:25,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:25,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:25,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218522662] [2024-06-14 13:55:25,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218522662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:25,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:25,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:25,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590472409] [2024-06-14 13:55:25,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:25,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:25,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:25,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:25,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 465 transitions, 7004 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:25,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:25,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:25,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:26,336 INFO L124 PetriNetUnfolderBase]: 2075/3503 cut-off events. [2024-06-14 13:55:26,336 INFO L125 PetriNetUnfolderBase]: For 206148/206148 co-relation queries the response was YES. [2024-06-14 13:55:26,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24934 conditions, 3503 events. 2075/3503 cut-off events. For 206148/206148 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 21595 event pairs, 380 based on Foata normal form. 1/3503 useless extension candidates. Maximal degree in co-relation 24777. Up to 2693 conditions per place. [2024-06-14 13:55:26,384 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 262 changer transitions 0/496 dead transitions. [2024-06-14 13:55:26,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 496 transitions, 8426 flow [2024-06-14 13:55:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:55:26,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:55:26,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 271 transitions. [2024-06-14 13:55:26,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084427767354597 [2024-06-14 13:55:26,384 INFO L175 Difference]: Start difference. First operand has 374 places, 465 transitions, 7004 flow. Second operand 13 states and 271 transitions. [2024-06-14 13:55:26,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 496 transitions, 8426 flow [2024-06-14 13:55:27,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 496 transitions, 8184 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:55:27,761 INFO L231 Difference]: Finished difference. Result has 376 places, 471 transitions, 7356 flow [2024-06-14 13:55:27,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6762, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7356, PETRI_PLACES=376, PETRI_TRANSITIONS=471} [2024-06-14 13:55:27,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-14 13:55:27,761 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 471 transitions, 7356 flow [2024-06-14 13:55:27,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:27,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:27,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:27,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:55:27,762 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:27,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:27,762 INFO L85 PathProgramCache]: Analyzing trace with hash -971684100, now seen corresponding path program 12 times [2024-06-14 13:55:27,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:27,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653429017] [2024-06-14 13:55:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:27,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:28,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:28,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653429017] [2024-06-14 13:55:28,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653429017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:28,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:28,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:28,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600775697] [2024-06-14 13:55:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:28,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:28,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:28,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 471 transitions, 7356 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:28,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:28,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:28,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:28,712 INFO L124 PetriNetUnfolderBase]: 2072/3499 cut-off events. [2024-06-14 13:55:28,712 INFO L125 PetriNetUnfolderBase]: For 208569/208569 co-relation queries the response was YES. [2024-06-14 13:55:28,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25207 conditions, 3499 events. 2072/3499 cut-off events. For 208569/208569 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 21589 event pairs, 380 based on Foata normal form. 1/3499 useless extension candidates. Maximal degree in co-relation 25049. Up to 2690 conditions per place. [2024-06-14 13:55:28,760 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 260 changer transitions 0/493 dead transitions. [2024-06-14 13:55:28,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 493 transitions, 8544 flow [2024-06-14 13:55:28,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:55:28,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:55:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 13:55:28,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 13:55:28,761 INFO L175 Difference]: Start difference. First operand has 376 places, 471 transitions, 7356 flow. Second operand 11 states and 236 transitions. [2024-06-14 13:55:28,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 493 transitions, 8544 flow [2024-06-14 13:55:30,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 493 transitions, 8085 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:30,216 INFO L231 Difference]: Finished difference. Result has 378 places, 471 transitions, 7424 flow [2024-06-14 13:55:30,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6897, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7424, PETRI_PLACES=378, PETRI_TRANSITIONS=471} [2024-06-14 13:55:30,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-14 13:55:30,217 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 471 transitions, 7424 flow [2024-06-14 13:55:30,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:30,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:30,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:30,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:55:30,217 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:30,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:30,218 INFO L85 PathProgramCache]: Analyzing trace with hash -856212789, now seen corresponding path program 1 times [2024-06-14 13:55:30,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:30,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248237212] [2024-06-14 13:55:30,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:30,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:30,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:30,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248237212] [2024-06-14 13:55:30,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248237212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:30,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:30,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:30,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437181009] [2024-06-14 13:55:30,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:30,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:30,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:30,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:30,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:30,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:30,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 471 transitions, 7424 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:30,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:30,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:30,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:31,180 INFO L124 PetriNetUnfolderBase]: 2080/3512 cut-off events. [2024-06-14 13:55:31,180 INFO L125 PetriNetUnfolderBase]: For 217021/217027 co-relation queries the response was YES. [2024-06-14 13:55:31,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25384 conditions, 3512 events. 2080/3512 cut-off events. For 217021/217027 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 21665 event pairs, 370 based on Foata normal form. 8/3520 useless extension candidates. Maximal degree in co-relation 25225. Up to 3078 conditions per place. [2024-06-14 13:55:31,226 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 417 selfloop transitions, 67 changer transitions 0/490 dead transitions. [2024-06-14 13:55:31,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 490 transitions, 8468 flow [2024-06-14 13:55:31,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:31,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 13:55:31,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-14 13:55:31,227 INFO L175 Difference]: Start difference. First operand has 378 places, 471 transitions, 7424 flow. Second operand 9 states and 188 transitions. [2024-06-14 13:55:31,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 490 transitions, 8468 flow [2024-06-14 13:55:32,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 490 transitions, 7948 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 13:55:32,624 INFO L231 Difference]: Finished difference. Result has 377 places, 473 transitions, 7087 flow [2024-06-14 13:55:32,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7087, PETRI_PLACES=377, PETRI_TRANSITIONS=473} [2024-06-14 13:55:32,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-14 13:55:32,624 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 473 transitions, 7087 flow [2024-06-14 13:55:32,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:32,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:32,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:32,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:55:32,625 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:32,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash -856219950, now seen corresponding path program 13 times [2024-06-14 13:55:32,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:32,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947570545] [2024-06-14 13:55:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:32,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:32,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:32,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947570545] [2024-06-14 13:55:32,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947570545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:32,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:32,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:32,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827734824] [2024-06-14 13:55:32,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:32,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:32,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:32,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:32,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:32,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:32,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 473 transitions, 7087 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:32,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:32,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:32,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:33,668 INFO L124 PetriNetUnfolderBase]: 2114/3568 cut-off events. [2024-06-14 13:55:33,669 INFO L125 PetriNetUnfolderBase]: For 227614/227614 co-relation queries the response was YES. [2024-06-14 13:55:33,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25644 conditions, 3568 events. 2114/3568 cut-off events. For 227614/227614 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22099 event pairs, 380 based on Foata normal form. 1/3568 useless extension candidates. Maximal degree in co-relation 25484. Up to 2965 conditions per place. [2024-06-14 13:55:33,715 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 164 changer transitions 0/509 dead transitions. [2024-06-14 13:55:33,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 509 transitions, 8650 flow [2024-06-14 13:55:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:55:33,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:55:33,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-14 13:55:33,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:55:33,716 INFO L175 Difference]: Start difference. First operand has 377 places, 473 transitions, 7087 flow. Second operand 12 states and 252 transitions. [2024-06-14 13:55:33,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 509 transitions, 8650 flow [2024-06-14 13:55:35,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 509 transitions, 8513 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:35,066 INFO L231 Difference]: Finished difference. Result has 384 places, 488 transitions, 7505 flow [2024-06-14 13:55:35,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6950, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7505, PETRI_PLACES=384, PETRI_TRANSITIONS=488} [2024-06-14 13:55:35,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-14 13:55:35,066 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 488 transitions, 7505 flow [2024-06-14 13:55:35,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:35,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:35,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:35,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:55:35,067 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:35,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:35,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1586569336, now seen corresponding path program 14 times [2024-06-14 13:55:35,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:35,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160964201] [2024-06-14 13:55:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:35,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:35,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:35,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160964201] [2024-06-14 13:55:35,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160964201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:35,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:35,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:35,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148962867] [2024-06-14 13:55:35,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:35,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:35,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:35,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:35,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:35,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:35,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 488 transitions, 7505 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:35,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:35,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:35,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:36,110 INFO L124 PetriNetUnfolderBase]: 2127/3590 cut-off events. [2024-06-14 13:55:36,110 INFO L125 PetriNetUnfolderBase]: For 237150/237150 co-relation queries the response was YES. [2024-06-14 13:55:36,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26142 conditions, 3590 events. 2127/3590 cut-off events. For 237150/237150 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 22277 event pairs, 380 based on Foata normal form. 1/3590 useless extension candidates. Maximal degree in co-relation 25980. Up to 2980 conditions per place. [2024-06-14 13:55:36,161 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 336 selfloop transitions, 174 changer transitions 0/516 dead transitions. [2024-06-14 13:55:36,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 516 transitions, 8999 flow [2024-06-14 13:55:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:55:36,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:55:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-14 13:55:36,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50093808630394 [2024-06-14 13:55:36,163 INFO L175 Difference]: Start difference. First operand has 384 places, 488 transitions, 7505 flow. Second operand 13 states and 267 transitions. [2024-06-14 13:55:36,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 516 transitions, 8999 flow [2024-06-14 13:55:37,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 516 transitions, 8840 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:37,929 INFO L231 Difference]: Finished difference. Result has 391 places, 494 transitions, 7788 flow [2024-06-14 13:55:37,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7346, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7788, PETRI_PLACES=391, PETRI_TRANSITIONS=494} [2024-06-14 13:55:37,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-14 13:55:37,930 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 494 transitions, 7788 flow [2024-06-14 13:55:37,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:37,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:37,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:37,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:55:37,930 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:37,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:37,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1586747896, now seen corresponding path program 15 times [2024-06-14 13:55:37,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:37,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303565881] [2024-06-14 13:55:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:37,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:38,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:38,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303565881] [2024-06-14 13:55:38,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303565881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:38,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:38,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:38,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78238974] [2024-06-14 13:55:38,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:38,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:38,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:38,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:38,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:38,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:38,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 494 transitions, 7788 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:38,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:38,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:38,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:38,930 INFO L124 PetriNetUnfolderBase]: 2124/3586 cut-off events. [2024-06-14 13:55:38,931 INFO L125 PetriNetUnfolderBase]: For 238687/238687 co-relation queries the response was YES. [2024-06-14 13:55:38,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26397 conditions, 3586 events. 2124/3586 cut-off events. For 238687/238687 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 22237 event pairs, 380 based on Foata normal form. 1/3586 useless extension candidates. Maximal degree in co-relation 26233. Up to 2977 conditions per place. [2024-06-14 13:55:38,980 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 168 changer transitions 0/514 dead transitions. [2024-06-14 13:55:38,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 514 transitions, 9190 flow [2024-06-14 13:55:38,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:55:38,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:55:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-14 13:55:38,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516629711751663 [2024-06-14 13:55:38,981 INFO L175 Difference]: Start difference. First operand has 391 places, 494 transitions, 7788 flow. Second operand 11 states and 233 transitions. [2024-06-14 13:55:38,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 514 transitions, 9190 flow [2024-06-14 13:55:40,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 514 transitions, 8882 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:40,410 INFO L231 Difference]: Finished difference. Result has 393 places, 494 transitions, 7822 flow [2024-06-14 13:55:40,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7480, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7822, PETRI_PLACES=393, PETRI_TRANSITIONS=494} [2024-06-14 13:55:40,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-14 13:55:40,410 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 494 transitions, 7822 flow [2024-06-14 13:55:40,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:40,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:40,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:40,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:55:40,411 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:40,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1586736736, now seen corresponding path program 16 times [2024-06-14 13:55:40,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:40,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532959426] [2024-06-14 13:55:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:40,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:40,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:40,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532959426] [2024-06-14 13:55:40,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532959426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:40,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:40,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:40,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916407614] [2024-06-14 13:55:40,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:40,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:40,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:40,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:40,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:40,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 494 transitions, 7822 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:40,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:40,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:40,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:41,520 INFO L124 PetriNetUnfolderBase]: 2121/3582 cut-off events. [2024-06-14 13:55:41,520 INFO L125 PetriNetUnfolderBase]: For 240304/240304 co-relation queries the response was YES. [2024-06-14 13:55:41,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26347 conditions, 3582 events. 2121/3582 cut-off events. For 240304/240304 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 22238 event pairs, 380 based on Foata normal form. 1/3582 useless extension candidates. Maximal degree in co-relation 26182. Up to 2974 conditions per place. [2024-06-14 13:55:41,563 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 338 selfloop transitions, 170 changer transitions 0/514 dead transitions. [2024-06-14 13:55:41,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 514 transitions, 9228 flow [2024-06-14 13:55:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:55:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:55:41,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-14 13:55:41,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-14 13:55:41,564 INFO L175 Difference]: Start difference. First operand has 393 places, 494 transitions, 7822 flow. Second operand 11 states and 234 transitions. [2024-06-14 13:55:41,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 514 transitions, 9228 flow [2024-06-14 13:55:43,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 514 transitions, 8970 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:43,283 INFO L231 Difference]: Finished difference. Result has 398 places, 494 transitions, 7911 flow [2024-06-14 13:55:43,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7564, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7911, PETRI_PLACES=398, PETRI_TRANSITIONS=494} [2024-06-14 13:55:43,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-14 13:55:43,284 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 494 transitions, 7911 flow [2024-06-14 13:55:43,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:43,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:43,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:43,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:55:43,284 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:43,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:43,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1586915296, now seen corresponding path program 17 times [2024-06-14 13:55:43,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:43,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384262828] [2024-06-14 13:55:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:43,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:43,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:43,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:43,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384262828] [2024-06-14 13:55:43,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384262828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:43,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:43,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:43,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981788568] [2024-06-14 13:55:43,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:43,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:43,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:43,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:43,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:43,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 494 transitions, 7911 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:43,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:43,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:43,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:44,328 INFO L124 PetriNetUnfolderBase]: 2118/3578 cut-off events. [2024-06-14 13:55:44,328 INFO L125 PetriNetUnfolderBase]: For 242014/242014 co-relation queries the response was YES. [2024-06-14 13:55:44,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26314 conditions, 3578 events. 2118/3578 cut-off events. For 242014/242014 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 22211 event pairs, 380 based on Foata normal form. 1/3578 useless extension candidates. Maximal degree in co-relation 26148. Up to 2971 conditions per place. [2024-06-14 13:55:44,378 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 338 selfloop transitions, 173 changer transitions 0/517 dead transitions. [2024-06-14 13:55:44,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 517 transitions, 9159 flow [2024-06-14 13:55:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:55:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:55:44,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 300 transitions. [2024-06-14 13:55:44,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-14 13:55:44,379 INFO L175 Difference]: Start difference. First operand has 398 places, 494 transitions, 7911 flow. Second operand 15 states and 300 transitions. [2024-06-14 13:55:44,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 517 transitions, 9159 flow [2024-06-14 13:55:45,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 517 transitions, 8793 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 13:55:46,001 INFO L231 Difference]: Finished difference. Result has 403 places, 494 transitions, 7897 flow [2024-06-14 13:55:46,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7545, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7897, PETRI_PLACES=403, PETRI_TRANSITIONS=494} [2024-06-14 13:55:46,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-14 13:55:46,001 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 494 transitions, 7897 flow [2024-06-14 13:55:46,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:46,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:46,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:46,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:55:46,002 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:46,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:46,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1586920876, now seen corresponding path program 18 times [2024-06-14 13:55:46,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:46,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761828503] [2024-06-14 13:55:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:46,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:46,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:46,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:46,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761828503] [2024-06-14 13:55:46,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761828503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:46,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:46,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:46,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492520518] [2024-06-14 13:55:46,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:46,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:46,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:46,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:46,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:46,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:46,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 494 transitions, 7897 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:46,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:46,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:46,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:47,155 INFO L124 PetriNetUnfolderBase]: 2115/3574 cut-off events. [2024-06-14 13:55:47,155 INFO L125 PetriNetUnfolderBase]: For 243101/243101 co-relation queries the response was YES. [2024-06-14 13:55:47,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26241 conditions, 3574 events. 2115/3574 cut-off events. For 243101/243101 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 22167 event pairs, 380 based on Foata normal form. 1/3574 useless extension candidates. Maximal degree in co-relation 26074. Up to 2968 conditions per place. [2024-06-14 13:55:47,205 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 172 changer transitions 0/515 dead transitions. [2024-06-14 13:55:47,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 515 transitions, 8963 flow [2024-06-14 13:55:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:55:47,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:55:47,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 283 transitions. [2024-06-14 13:55:47,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930313588850174 [2024-06-14 13:55:47,206 INFO L175 Difference]: Start difference. First operand has 403 places, 494 transitions, 7897 flow. Second operand 14 states and 283 transitions. [2024-06-14 13:55:47,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 515 transitions, 8963 flow [2024-06-14 13:55:49,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 515 transitions, 8406 flow, removed 16 selfloop flow, removed 16 redundant places. [2024-06-14 13:55:49,043 INFO L231 Difference]: Finished difference. Result has 401 places, 494 transitions, 7690 flow [2024-06-14 13:55:49,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7340, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7690, PETRI_PLACES=401, PETRI_TRANSITIONS=494} [2024-06-14 13:55:49,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-14 13:55:49,043 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 494 transitions, 7690 flow [2024-06-14 13:55:49,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:49,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:49,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:49,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:55:49,043 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:49,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:49,044 INFO L85 PathProgramCache]: Analyzing trace with hash 837680007, now seen corresponding path program 2 times [2024-06-14 13:55:49,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:49,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120231258] [2024-06-14 13:55:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:49,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:49,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:49,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120231258] [2024-06-14 13:55:49,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120231258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:49,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:49,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:49,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104946145] [2024-06-14 13:55:49,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:49,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:49,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:49,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:49,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:49,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 494 transitions, 7690 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:49,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:49,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:49,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:49,976 INFO L124 PetriNetUnfolderBase]: 2123/3590 cut-off events. [2024-06-14 13:55:49,976 INFO L125 PetriNetUnfolderBase]: For 255592/255600 co-relation queries the response was YES. [2024-06-14 13:55:50,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26129 conditions, 3590 events. 2123/3590 cut-off events. For 255592/255600 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 22379 event pairs, 388 based on Foata normal form. 10/3600 useless extension candidates. Maximal degree in co-relation 25962. Up to 3141 conditions per place. [2024-06-14 13:55:50,024 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 441 selfloop transitions, 60 changer transitions 0/507 dead transitions. [2024-06-14 13:55:50,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 507 transitions, 8758 flow [2024-06-14 13:55:50,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:55:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:55:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 13:55:50,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:55:50,025 INFO L175 Difference]: Start difference. First operand has 401 places, 494 transitions, 7690 flow. Second operand 6 states and 132 transitions. [2024-06-14 13:55:50,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 507 transitions, 8758 flow [2024-06-14 13:55:51,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 507 transitions, 8346 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-14 13:55:51,901 INFO L231 Difference]: Finished difference. Result has 393 places, 496 transitions, 7450 flow [2024-06-14 13:55:51,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7278, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7450, PETRI_PLACES=393, PETRI_TRANSITIONS=496} [2024-06-14 13:55:51,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-14 13:55:51,902 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 496 transitions, 7450 flow [2024-06-14 13:55:51,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:51,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:51,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:51,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:55:51,902 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:51,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1463896219, now seen corresponding path program 3 times [2024-06-14 13:55:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:51,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321775954] [2024-06-14 13:55:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:51,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:52,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:52,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:52,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321775954] [2024-06-14 13:55:52,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321775954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:52,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:52,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:52,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617499388] [2024-06-14 13:55:52,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:52,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:52,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:52,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:52,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:52,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:52,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 496 transitions, 7450 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:52,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:52,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:52,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:52,872 INFO L124 PetriNetUnfolderBase]: 2131/3597 cut-off events. [2024-06-14 13:55:52,872 INFO L125 PetriNetUnfolderBase]: For 255949/255955 co-relation queries the response was YES. [2024-06-14 13:55:52,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26113 conditions, 3597 events. 2131/3597 cut-off events. For 255949/255955 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 22329 event pairs, 370 based on Foata normal form. 8/3605 useless extension candidates. Maximal degree in co-relation 25945. Up to 3137 conditions per place. [2024-06-14 13:55:52,920 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 440 selfloop transitions, 68 changer transitions 0/514 dead transitions. [2024-06-14 13:55:52,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 514 transitions, 8548 flow [2024-06-14 13:55:52,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:52,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-14 13:55:52,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-14 13:55:52,921 INFO L175 Difference]: Start difference. First operand has 393 places, 496 transitions, 7450 flow. Second operand 8 states and 170 transitions. [2024-06-14 13:55:52,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 514 transitions, 8548 flow [2024-06-14 13:55:54,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 514 transitions, 8394 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 13:55:54,637 INFO L231 Difference]: Finished difference. Result has 397 places, 498 transitions, 7496 flow [2024-06-14 13:55:54,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7298, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7496, PETRI_PLACES=397, PETRI_TRANSITIONS=498} [2024-06-14 13:55:54,638 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-14 13:55:54,638 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 498 transitions, 7496 flow [2024-06-14 13:55:54,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:54,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:54,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:54,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:55:54,638 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:54,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:54,638 INFO L85 PathProgramCache]: Analyzing trace with hash 846250887, now seen corresponding path program 4 times [2024-06-14 13:55:54,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:54,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036276652] [2024-06-14 13:55:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:54,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:54,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:54,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036276652] [2024-06-14 13:55:54,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036276652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:54,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:54,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:54,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484881176] [2024-06-14 13:55:54,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:54,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:54,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:54,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:54,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:54,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:54,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 498 transitions, 7496 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:54,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:54,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:54,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:55,577 INFO L124 PetriNetUnfolderBase]: 2139/3616 cut-off events. [2024-06-14 13:55:55,577 INFO L125 PetriNetUnfolderBase]: For 260551/260559 co-relation queries the response was YES. [2024-06-14 13:55:55,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26265 conditions, 3616 events. 2139/3616 cut-off events. For 260551/260559 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 22555 event pairs, 356 based on Foata normal form. 10/3626 useless extension candidates. Maximal degree in co-relation 26096. Up to 3109 conditions per place. [2024-06-14 13:55:55,625 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 434 selfloop transitions, 74 changer transitions 0/514 dead transitions. [2024-06-14 13:55:55,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 514 transitions, 8619 flow [2024-06-14 13:55:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:55:55,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:55:55,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-14 13:55:55,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-14 13:55:55,626 INFO L175 Difference]: Start difference. First operand has 397 places, 498 transitions, 7496 flow. Second operand 6 states and 133 transitions. [2024-06-14 13:55:55,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 514 transitions, 8619 flow [2024-06-14 13:55:57,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 514 transitions, 8447 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:57,355 INFO L231 Difference]: Finished difference. Result has 398 places, 502 transitions, 7591 flow [2024-06-14 13:55:57,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7332, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7591, PETRI_PLACES=398, PETRI_TRANSITIONS=502} [2024-06-14 13:55:57,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-14 13:55:57,355 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 502 transitions, 7591 flow [2024-06-14 13:55:57,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:57,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:57,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:57,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:55:57,356 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:57,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash 837672846, now seen corresponding path program 19 times [2024-06-14 13:55:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:57,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035122322] [2024-06-14 13:55:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:57,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:57,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:57,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035122322] [2024-06-14 13:55:57,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035122322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:57,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:57,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:55:57,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368438361] [2024-06-14 13:55:57,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:57,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:55:57,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:57,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:55:57,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:55:57,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:57,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 502 transitions, 7591 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:57,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:57,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:57,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:58,355 INFO L124 PetriNetUnfolderBase]: 2176/3679 cut-off events. [2024-06-14 13:55:58,356 INFO L125 PetriNetUnfolderBase]: For 261149/261151 co-relation queries the response was YES. [2024-06-14 13:55:58,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26759 conditions, 3679 events. 2176/3679 cut-off events. For 261149/261151 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 23014 event pairs, 413 based on Foata normal form. 3/3681 useless extension candidates. Maximal degree in co-relation 26588. Up to 2917 conditions per place. [2024-06-14 13:55:58,409 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 300 selfloop transitions, 229 changer transitions 0/535 dead transitions. [2024-06-14 13:55:58,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 535 transitions, 9234 flow [2024-06-14 13:55:58,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-14 13:55:58,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-14 13:55:58,410 INFO L175 Difference]: Start difference. First operand has 398 places, 502 transitions, 7591 flow. Second operand 9 states and 197 transitions. [2024-06-14 13:55:58,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 535 transitions, 9234 flow [2024-06-14 13:56:00,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 535 transitions, 9110 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-14 13:56:00,324 INFO L231 Difference]: Finished difference. Result has 406 places, 517 transitions, 8206 flow [2024-06-14 13:56:00,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8206, PETRI_PLACES=406, PETRI_TRANSITIONS=517} [2024-06-14 13:56:00,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-14 13:56:00,325 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 517 transitions, 8206 flow [2024-06-14 13:56:00,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:00,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:00,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:00,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:56:00,325 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:00,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:00,325 INFO L85 PathProgramCache]: Analyzing trace with hash 837667266, now seen corresponding path program 20 times [2024-06-14 13:56:00,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:00,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198131677] [2024-06-14 13:56:00,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:00,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:00,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:00,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198131677] [2024-06-14 13:56:00,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198131677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:00,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:00,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:00,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447296352] [2024-06-14 13:56:00,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:00,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:00,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:00,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:00,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:00,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 517 transitions, 8206 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:00,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:00,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:00,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:01,355 INFO L124 PetriNetUnfolderBase]: 2173/3675 cut-off events. [2024-06-14 13:56:01,355 INFO L125 PetriNetUnfolderBase]: For 258694/258696 co-relation queries the response was YES. [2024-06-14 13:56:01,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27169 conditions, 3675 events. 2173/3675 cut-off events. For 258694/258696 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 22932 event pairs, 413 based on Foata normal form. 3/3677 useless extension candidates. Maximal degree in co-relation 26995. Up to 2914 conditions per place. [2024-06-14 13:56:01,407 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 300 selfloop transitions, 230 changer transitions 0/536 dead transitions. [2024-06-14 13:56:01,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 536 transitions, 9488 flow [2024-06-14 13:56:01,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:56:01,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:56:01,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 13:56:01,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-14 13:56:01,407 INFO L175 Difference]: Start difference. First operand has 406 places, 517 transitions, 8206 flow. Second operand 11 states and 230 transitions. [2024-06-14 13:56:01,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 536 transitions, 9488 flow [2024-06-14 13:56:03,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 536 transitions, 9317 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 13:56:03,400 INFO L231 Difference]: Finished difference. Result has 414 places, 517 transitions, 8501 flow [2024-06-14 13:56:03,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8035, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8501, PETRI_PLACES=414, PETRI_TRANSITIONS=517} [2024-06-14 13:56:03,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-14 13:56:03,400 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 517 transitions, 8501 flow [2024-06-14 13:56:03,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:03,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:03,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:03,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:56:03,401 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:03,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:03,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1463889058, now seen corresponding path program 21 times [2024-06-14 13:56:03,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:03,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831070033] [2024-06-14 13:56:03,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:03,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:03,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:03,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:03,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831070033] [2024-06-14 13:56:03,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831070033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:03,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:03,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:03,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083505254] [2024-06-14 13:56:03,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:03,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:03,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:03,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:03,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:03,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:03,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 517 transitions, 8501 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:03,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:03,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:03,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:04,441 INFO L124 PetriNetUnfolderBase]: 2186/3693 cut-off events. [2024-06-14 13:56:04,441 INFO L125 PetriNetUnfolderBase]: For 263677/263677 co-relation queries the response was YES. [2024-06-14 13:56:04,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27893 conditions, 3693 events. 2186/3693 cut-off events. For 263677/263677 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 23064 event pairs, 382 based on Foata normal form. 1/3693 useless extension candidates. Maximal degree in co-relation 27717. Up to 2929 conditions per place. [2024-06-14 13:56:04,496 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 244 changer transitions 0/546 dead transitions. [2024-06-14 13:56:04,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 546 transitions, 10101 flow [2024-06-14 13:56:04,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:56:04,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:56:04,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-14 13:56:04,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277161862527716 [2024-06-14 13:56:04,497 INFO L175 Difference]: Start difference. First operand has 414 places, 517 transitions, 8501 flow. Second operand 11 states and 238 transitions. [2024-06-14 13:56:04,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 546 transitions, 10101 flow [2024-06-14 13:56:06,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 546 transitions, 9629 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:56:06,433 INFO L231 Difference]: Finished difference. Result has 416 places, 523 transitions, 8635 flow [2024-06-14 13:56:06,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8041, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8635, PETRI_PLACES=416, PETRI_TRANSITIONS=523} [2024-06-14 13:56:06,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-14 13:56:06,433 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 523 transitions, 8635 flow [2024-06-14 13:56:06,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:06,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:06,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:06,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:56:06,434 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:06,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:06,434 INFO L85 PathProgramCache]: Analyzing trace with hash 609587556, now seen corresponding path program 22 times [2024-06-14 13:56:06,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:06,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527831911] [2024-06-14 13:56:06,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:06,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:06,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:06,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527831911] [2024-06-14 13:56:06,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527831911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:06,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:06,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:06,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132309144] [2024-06-14 13:56:06,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:06,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:06,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:06,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:06,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:06,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:06,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 523 transitions, 8635 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:06,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:06,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:06,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:07,567 INFO L124 PetriNetUnfolderBase]: 2191/3702 cut-off events. [2024-06-14 13:56:07,567 INFO L125 PetriNetUnfolderBase]: For 269046/269046 co-relation queries the response was YES. [2024-06-14 13:56:07,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28048 conditions, 3702 events. 2191/3702 cut-off events. For 269046/269046 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 23158 event pairs, 382 based on Foata normal form. 1/3702 useless extension candidates. Maximal degree in co-relation 27871. Up to 2935 conditions per place. [2024-06-14 13:56:07,614 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 247 changer transitions 0/550 dead transitions. [2024-06-14 13:56:07,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 550 transitions, 10198 flow [2024-06-14 13:56:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:07,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-14 13:56:07,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-14 13:56:07,615 INFO L175 Difference]: Start difference. First operand has 416 places, 523 transitions, 8635 flow. Second operand 9 states and 203 transitions. [2024-06-14 13:56:07,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 550 transitions, 10198 flow [2024-06-14 13:56:09,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 550 transitions, 9681 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-14 13:56:09,452 INFO L231 Difference]: Finished difference. Result has 416 places, 526 transitions, 8679 flow [2024-06-14 13:56:09,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8128, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8679, PETRI_PLACES=416, PETRI_TRANSITIONS=526} [2024-06-14 13:56:09,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-14 13:56:09,452 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 526 transitions, 8679 flow [2024-06-14 13:56:09,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:09,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:09,453 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, 1] [2024-06-14 13:56:09,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:56:09,453 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:09,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:09,453 INFO L85 PathProgramCache]: Analyzing trace with hash 609766116, now seen corresponding path program 23 times [2024-06-14 13:56:09,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:09,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006756989] [2024-06-14 13:56:09,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:09,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:09,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:09,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006756989] [2024-06-14 13:56:09,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006756989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:09,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:09,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:09,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786931444] [2024-06-14 13:56:09,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:09,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:09,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:09,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:09,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:09,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:09,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 526 transitions, 8679 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:09,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:09,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:09,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:10,529 INFO L124 PetriNetUnfolderBase]: 2196/3711 cut-off events. [2024-06-14 13:56:10,529 INFO L125 PetriNetUnfolderBase]: For 269034/269034 co-relation queries the response was YES. [2024-06-14 13:56:10,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28108 conditions, 3711 events. 2196/3711 cut-off events. For 269034/269034 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 23208 event pairs, 382 based on Foata normal form. 1/3711 useless extension candidates. Maximal degree in co-relation 27931. Up to 2941 conditions per place. [2024-06-14 13:56:10,584 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 258 changer transitions 0/553 dead transitions. [2024-06-14 13:56:10,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 553 transitions, 10246 flow [2024-06-14 13:56:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:56:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:56:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-14 13:56:10,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-14 13:56:10,585 INFO L175 Difference]: Start difference. First operand has 416 places, 526 transitions, 8679 flow. Second operand 12 states and 253 transitions. [2024-06-14 13:56:10,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 553 transitions, 10246 flow [2024-06-14 13:56:12,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 553 transitions, 9763 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:12,496 INFO L231 Difference]: Finished difference. Result has 421 places, 529 transitions, 8779 flow [2024-06-14 13:56:12,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8206, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8779, PETRI_PLACES=421, PETRI_TRANSITIONS=529} [2024-06-14 13:56:12,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-14 13:56:12,496 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 529 transitions, 8779 flow [2024-06-14 13:56:12,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:12,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:12,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:12,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:56:12,496 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:12,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash 609598716, now seen corresponding path program 24 times [2024-06-14 13:56:12,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:12,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152015077] [2024-06-14 13:56:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:12,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:12,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:12,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152015077] [2024-06-14 13:56:12,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152015077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:12,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:12,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:12,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305478589] [2024-06-14 13:56:12,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:12,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:12,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:12,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:12,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:12,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:12,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 529 transitions, 8779 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:12,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:12,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:12,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:13,565 INFO L124 PetriNetUnfolderBase]: 2193/3707 cut-off events. [2024-06-14 13:56:13,565 INFO L125 PetriNetUnfolderBase]: For 264868/264868 co-relation queries the response was YES. [2024-06-14 13:56:13,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28023 conditions, 3707 events. 2193/3707 cut-off events. For 264868/264868 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 23177 event pairs, 382 based on Foata normal form. 1/3707 useless extension candidates. Maximal degree in co-relation 27846. Up to 2938 conditions per place. [2024-06-14 13:56:13,615 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 294 selfloop transitions, 250 changer transitions 0/550 dead transitions. [2024-06-14 13:56:13,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 550 transitions, 10281 flow [2024-06-14 13:56:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:13,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:56:13,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 13:56:13,616 INFO L175 Difference]: Start difference. First operand has 421 places, 529 transitions, 8779 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:56:13,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 550 transitions, 10281 flow [2024-06-14 13:56:15,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 550 transitions, 9839 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-14 13:56:15,061 INFO L231 Difference]: Finished difference. Result has 421 places, 529 transitions, 8853 flow [2024-06-14 13:56:15,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8341, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8853, PETRI_PLACES=421, PETRI_TRANSITIONS=529} [2024-06-14 13:56:15,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-14 13:56:15,061 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 529 transitions, 8853 flow [2024-06-14 13:56:15,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:15,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:15,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:15,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:56:15,062 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:15,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:15,062 INFO L85 PathProgramCache]: Analyzing trace with hash 609420156, now seen corresponding path program 25 times [2024-06-14 13:56:15,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:15,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36910044] [2024-06-14 13:56:15,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:15,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:15,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:15,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36910044] [2024-06-14 13:56:15,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36910044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:15,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:15,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:15,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349605924] [2024-06-14 13:56:15,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:15,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:15,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:15,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:15,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:15,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:15,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 529 transitions, 8853 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:15,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:15,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:15,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:16,150 INFO L124 PetriNetUnfolderBase]: 2190/3703 cut-off events. [2024-06-14 13:56:16,150 INFO L125 PetriNetUnfolderBase]: For 261204/261204 co-relation queries the response was YES. [2024-06-14 13:56:16,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27920 conditions, 3703 events. 2190/3703 cut-off events. For 261204/261204 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 23203 event pairs, 382 based on Foata normal form. 1/3703 useless extension candidates. Maximal degree in co-relation 27743. Up to 2935 conditions per place. [2024-06-14 13:56:16,207 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 264 changer transitions 0/559 dead transitions. [2024-06-14 13:56:16,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 559 transitions, 10213 flow [2024-06-14 13:56:16,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:56:16,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:56:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-14 13:56:16,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140712945590994 [2024-06-14 13:56:16,208 INFO L175 Difference]: Start difference. First operand has 421 places, 529 transitions, 8853 flow. Second operand 13 states and 274 transitions. [2024-06-14 13:56:16,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 559 transitions, 10213 flow [2024-06-14 13:56:18,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 559 transitions, 9672 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 13:56:18,114 INFO L231 Difference]: Finished difference. Result has 425 places, 529 transitions, 8856 flow [2024-06-14 13:56:18,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8314, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8856, PETRI_PLACES=425, PETRI_TRANSITIONS=529} [2024-06-14 13:56:18,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-14 13:56:18,115 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 529 transitions, 8856 flow [2024-06-14 13:56:18,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:18,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:18,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:18,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:56:18,115 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:18,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:18,115 INFO L85 PathProgramCache]: Analyzing trace with hash 609414576, now seen corresponding path program 26 times [2024-06-14 13:56:18,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:18,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636565868] [2024-06-14 13:56:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:18,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:18,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:18,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:18,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636565868] [2024-06-14 13:56:18,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636565868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:18,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:18,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:56:18,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67339561] [2024-06-14 13:56:18,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:18,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:56:18,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:18,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:56:18,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:56:18,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:18,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 529 transitions, 8856 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:18,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:18,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:18,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:19,153 INFO L124 PetriNetUnfolderBase]: 2187/3699 cut-off events. [2024-06-14 13:56:19,153 INFO L125 PetriNetUnfolderBase]: For 256810/256810 co-relation queries the response was YES. [2024-06-14 13:56:19,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27823 conditions, 3699 events. 2187/3699 cut-off events. For 256810/256810 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 23190 event pairs, 382 based on Foata normal form. 1/3699 useless extension candidates. Maximal degree in co-relation 27646. Up to 2932 conditions per place. [2024-06-14 13:56:19,205 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 262 changer transitions 0/560 dead transitions. [2024-06-14 13:56:19,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 560 transitions, 10040 flow [2024-06-14 13:56:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:56:19,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:56:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-14 13:56:19,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:56:19,206 INFO L175 Difference]: Start difference. First operand has 425 places, 529 transitions, 8856 flow. Second operand 12 states and 261 transitions. [2024-06-14 13:56:19,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 560 transitions, 10040 flow [2024-06-14 13:56:20,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 560 transitions, 9312 flow, removed 12 selfloop flow, removed 15 redundant places. [2024-06-14 13:56:20,932 INFO L231 Difference]: Finished difference. Result has 422 places, 529 transitions, 8666 flow [2024-06-14 13:56:20,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8128, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8666, PETRI_PLACES=422, PETRI_TRANSITIONS=529} [2024-06-14 13:56:20,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-14 13:56:20,933 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 529 transitions, 8666 flow [2024-06-14 13:56:20,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:20,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:20,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:20,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:56:20,934 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:20,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:20,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1097715234, now seen corresponding path program 27 times [2024-06-14 13:56:20,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:20,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849554506] [2024-06-14 13:56:20,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:20,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:21,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:21,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:21,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849554506] [2024-06-14 13:56:21,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849554506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:21,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:21,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:56:21,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640166321] [2024-06-14 13:56:21,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:21,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:56:21,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:21,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:56:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:56:21,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:21,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 529 transitions, 8666 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:21,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:21,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:21,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:22,003 INFO L124 PetriNetUnfolderBase]: 2192/3709 cut-off events. [2024-06-14 13:56:22,003 INFO L125 PetriNetUnfolderBase]: For 250874/250874 co-relation queries the response was YES. [2024-06-14 13:56:22,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27735 conditions, 3709 events. 2192/3709 cut-off events. For 250874/250874 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 23290 event pairs, 365 based on Foata normal form. 1/3710 useless extension candidates. Maximal degree in co-relation 27559. Up to 2742 conditions per place. [2024-06-14 13:56:22,056 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 231 selfloop transitions, 336 changer transitions 0/573 dead transitions. [2024-06-14 13:56:22,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 573 transitions, 10194 flow [2024-06-14 13:56:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:56:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:56:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 297 transitions. [2024-06-14 13:56:22,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5174216027874564 [2024-06-14 13:56:22,057 INFO L175 Difference]: Start difference. First operand has 422 places, 529 transitions, 8666 flow. Second operand 14 states and 297 transitions. [2024-06-14 13:56:22,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 573 transitions, 10194 flow [2024-06-14 13:56:23,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 573 transitions, 9610 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-06-14 13:56:23,221 INFO L231 Difference]: Finished difference. Result has 422 places, 535 transitions, 8886 flow [2024-06-14 13:56:23,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8086, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8886, PETRI_PLACES=422, PETRI_TRANSITIONS=535} [2024-06-14 13:56:23,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-14 13:56:23,222 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 535 transitions, 8886 flow [2024-06-14 13:56:23,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:23,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:23,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:23,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:56:23,222 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:23,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:23,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1799351699, now seen corresponding path program 5 times [2024-06-14 13:56:23,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:23,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676744930] [2024-06-14 13:56:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:23,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:23,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:23,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676744930] [2024-06-14 13:56:23,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676744930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:23,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:23,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:23,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045832511] [2024-06-14 13:56:23,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:23,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:23,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:23,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:23,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:23,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 535 transitions, 8886 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:23,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:23,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:23,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:24,308 INFO L124 PetriNetUnfolderBase]: 2200/3717 cut-off events. [2024-06-14 13:56:24,308 INFO L125 PetriNetUnfolderBase]: For 252722/252722 co-relation queries the response was YES. [2024-06-14 13:56:24,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28228 conditions, 3717 events. 2200/3717 cut-off events. For 252722/252722 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 23232 event pairs, 365 based on Foata normal form. 2/3719 useless extension candidates. Maximal degree in co-relation 28053. Up to 3243 conditions per place. [2024-06-14 13:56:24,363 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 483 selfloop transitions, 78 changer transitions 0/567 dead transitions. [2024-06-14 13:56:24,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 567 transitions, 10128 flow [2024-06-14 13:56:24,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:56:24,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:56:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-14 13:56:24,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020325203252033 [2024-06-14 13:56:24,364 INFO L175 Difference]: Start difference. First operand has 422 places, 535 transitions, 8886 flow. Second operand 12 states and 247 transitions. [2024-06-14 13:56:24,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 567 transitions, 10128 flow [2024-06-14 13:56:25,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 567 transitions, 9854 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-14 13:56:25,946 INFO L231 Difference]: Finished difference. Result has 426 places, 537 transitions, 8819 flow [2024-06-14 13:56:25,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8612, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8819, PETRI_PLACES=426, PETRI_TRANSITIONS=537} [2024-06-14 13:56:25,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-14 13:56:25,947 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 537 transitions, 8819 flow [2024-06-14 13:56:25,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:25,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:25,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:25,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:56:25,948 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:25,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:25,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1798876469, now seen corresponding path program 6 times [2024-06-14 13:56:25,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:25,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620504872] [2024-06-14 13:56:25,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:25,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:26,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:26,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620504872] [2024-06-14 13:56:26,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620504872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:26,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:26,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:26,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349695788] [2024-06-14 13:56:26,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:26,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:26,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:26,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:26,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:26,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 537 transitions, 8819 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:26,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:26,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:26,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:27,020 INFO L124 PetriNetUnfolderBase]: 2208/3727 cut-off events. [2024-06-14 13:56:27,020 INFO L125 PetriNetUnfolderBase]: For 254242/254242 co-relation queries the response was YES. [2024-06-14 13:56:27,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28169 conditions, 3727 events. 2208/3727 cut-off events. For 254242/254242 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 23317 event pairs, 363 based on Foata normal form. 2/3729 useless extension candidates. Maximal degree in co-relation 27992. Up to 3233 conditions per place. [2024-06-14 13:56:27,071 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 480 selfloop transitions, 84 changer transitions 0/570 dead transitions. [2024-06-14 13:56:27,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 570 transitions, 10073 flow [2024-06-14 13:56:27,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:56:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:56:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-14 13:56:27,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-14 13:56:27,072 INFO L175 Difference]: Start difference. First operand has 426 places, 537 transitions, 8819 flow. Second operand 12 states and 248 transitions. [2024-06-14 13:56:27,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 570 transitions, 10073 flow [2024-06-14 13:56:28,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 570 transitions, 9912 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-14 13:56:28,803 INFO L231 Difference]: Finished difference. Result has 429 places, 539 transitions, 8881 flow [2024-06-14 13:56:28,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8658, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8881, PETRI_PLACES=429, PETRI_TRANSITIONS=539} [2024-06-14 13:56:28,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-14 13:56:28,804 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 539 transitions, 8881 flow [2024-06-14 13:56:28,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:28,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:28,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:28,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 13:56:28,804 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:28,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1984948730, now seen corresponding path program 28 times [2024-06-14 13:56:28,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:28,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708214317] [2024-06-14 13:56:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:28,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:29,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:29,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708214317] [2024-06-14 13:56:29,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708214317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:29,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:29,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:56:29,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334336778] [2024-06-14 13:56:29,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:29,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:56:29,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:29,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:56:29,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:56:29,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:29,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 539 transitions, 8881 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:29,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:29,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:29,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:29,929 INFO L124 PetriNetUnfolderBase]: 2221/3750 cut-off events. [2024-06-14 13:56:29,929 INFO L125 PetriNetUnfolderBase]: For 260827/260827 co-relation queries the response was YES. [2024-06-14 13:56:29,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28494 conditions, 3750 events. 2221/3750 cut-off events. For 260827/260827 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 23499 event pairs, 384 based on Foata normal form. 1/3750 useless extension candidates. Maximal degree in co-relation 28316. Up to 3197 conditions per place. [2024-06-14 13:56:29,983 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 447 selfloop transitions, 110 changer transitions 0/563 dead transitions. [2024-06-14 13:56:29,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 563 transitions, 10313 flow [2024-06-14 13:56:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:56:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:56:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 13:56:29,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-14 13:56:29,984 INFO L175 Difference]: Start difference. First operand has 429 places, 539 transitions, 8881 flow. Second operand 10 states and 209 transitions. [2024-06-14 13:56:29,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 563 transitions, 10313 flow [2024-06-14 13:56:31,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 563 transitions, 10067 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-14 13:56:31,770 INFO L231 Difference]: Finished difference. Result has 428 places, 545 transitions, 8965 flow [2024-06-14 13:56:31,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8635, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8965, PETRI_PLACES=428, PETRI_TRANSITIONS=545} [2024-06-14 13:56:31,771 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-14 13:56:31,771 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 545 transitions, 8965 flow [2024-06-14 13:56:31,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:31,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:31,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:31,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 13:56:31,771 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:31,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1984937570, now seen corresponding path program 29 times [2024-06-14 13:56:31,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:31,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409153921] [2024-06-14 13:56:31,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:31,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:32,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:32,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409153921] [2024-06-14 13:56:32,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409153921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:32,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:32,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:56:32,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035160926] [2024-06-14 13:56:32,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:32,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:56:32,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:32,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:56:32,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:56:32,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:32,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 545 transitions, 8965 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:32,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:32,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:32,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:32,986 INFO L124 PetriNetUnfolderBase]: 2218/3750 cut-off events. [2024-06-14 13:56:32,986 INFO L125 PetriNetUnfolderBase]: For 261613/261613 co-relation queries the response was YES. [2024-06-14 13:56:33,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28381 conditions, 3750 events. 2218/3750 cut-off events. For 261613/261613 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 23550 event pairs, 386 based on Foata normal form. 1/3750 useless extension candidates. Maximal degree in co-relation 28202. Up to 3194 conditions per place. [2024-06-14 13:56:33,036 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 447 selfloop transitions, 107 changer transitions 0/560 dead transitions. [2024-06-14 13:56:33,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 560 transitions, 10109 flow [2024-06-14 13:56:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:56:33,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:56:33,037 INFO L175 Difference]: Start difference. First operand has 428 places, 545 transitions, 8965 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:56:33,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 560 transitions, 10109 flow [2024-06-14 13:56:34,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 560 transitions, 9944 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:56:34,432 INFO L231 Difference]: Finished difference. Result has 430 places, 545 transitions, 9025 flow [2024-06-14 13:56:34,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8800, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9025, PETRI_PLACES=430, PETRI_TRANSITIONS=545} [2024-06-14 13:56:34,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-14 13:56:34,432 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 545 transitions, 9025 flow [2024-06-14 13:56:34,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:34,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:34,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:34,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 13:56:34,433 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:34,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:34,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1301560430, now seen corresponding path program 30 times [2024-06-14 13:56:34,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:34,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792225384] [2024-06-14 13:56:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:34,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:34,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:34,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792225384] [2024-06-14 13:56:34,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792225384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:34,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:34,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:56:34,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813087744] [2024-06-14 13:56:34,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:34,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:56:34,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:56:34,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:56:34,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:34,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 545 transitions, 9025 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:34,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:34,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:34,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:35,542 INFO L124 PetriNetUnfolderBase]: 2239/3786 cut-off events. [2024-06-14 13:56:35,543 INFO L125 PetriNetUnfolderBase]: For 275244/275244 co-relation queries the response was YES. [2024-06-14 13:56:35,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29029 conditions, 3786 events. 2239/3786 cut-off events. For 275244/275244 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 23823 event pairs, 369 based on Foata normal form. 1/3787 useless extension candidates. Maximal degree in co-relation 28848. Up to 3076 conditions per place. [2024-06-14 13:56:35,598 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 364 selfloop transitions, 218 changer transitions 0/588 dead transitions. [2024-06-14 13:56:35,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 588 transitions, 10803 flow [2024-06-14 13:56:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:56:35,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:56:35,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 310 transitions. [2024-06-14 13:56:35,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-14 13:56:35,599 INFO L175 Difference]: Start difference. First operand has 430 places, 545 transitions, 9025 flow. Second operand 15 states and 310 transitions. [2024-06-14 13:56:35,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 588 transitions, 10803 flow [2024-06-14 13:56:37,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 588 transitions, 10589 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:37,213 INFO L231 Difference]: Finished difference. Result has 438 places, 554 transitions, 9415 flow [2024-06-14 13:56:37,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8811, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9415, PETRI_PLACES=438, PETRI_TRANSITIONS=554} [2024-06-14 13:56:37,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-14 13:56:37,213 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 554 transitions, 9415 flow [2024-06-14 13:56:37,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:37,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:37,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:37,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 13:56:37,214 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:37,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1813174010, now seen corresponding path program 31 times [2024-06-14 13:56:37,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:37,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922010644] [2024-06-14 13:56:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:37,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:37,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:37,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922010644] [2024-06-14 13:56:37,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922010644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:37,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:37,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:56:37,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824586631] [2024-06-14 13:56:37,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:37,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:56:37,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:37,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:56:37,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:56:37,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:37,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 554 transitions, 9415 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:37,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:37,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:37,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:38,369 INFO L124 PetriNetUnfolderBase]: 2244/3791 cut-off events. [2024-06-14 13:56:38,370 INFO L125 PetriNetUnfolderBase]: For 281686/281686 co-relation queries the response was YES. [2024-06-14 13:56:38,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29406 conditions, 3791 events. 2244/3791 cut-off events. For 281686/281686 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 23813 event pairs, 365 based on Foata normal form. 1/3792 useless extension candidates. Maximal degree in co-relation 29224. Up to 3082 conditions per place. [2024-06-14 13:56:38,425 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 361 selfloop transitions, 225 changer transitions 0/592 dead transitions. [2024-06-14 13:56:38,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 592 transitions, 10921 flow [2024-06-14 13:56:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-14 13:56:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-14 13:56:38,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 341 transitions. [2024-06-14 13:56:38,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48923959827833574 [2024-06-14 13:56:38,426 INFO L175 Difference]: Start difference. First operand has 438 places, 554 transitions, 9415 flow. Second operand 17 states and 341 transitions. [2024-06-14 13:56:38,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 592 transitions, 10921 flow [2024-06-14 13:56:40,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 592 transitions, 10661 flow, removed 35 selfloop flow, removed 10 redundant places. [2024-06-14 13:56:40,220 INFO L231 Difference]: Finished difference. Result has 445 places, 557 transitions, 9669 flow [2024-06-14 13:56:40,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9165, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=9669, PETRI_PLACES=445, PETRI_TRANSITIONS=557} [2024-06-14 13:56:40,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-14 13:56:40,221 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 557 transitions, 9669 flow [2024-06-14 13:56:40,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:40,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:40,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:40,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 13:56:40,221 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:40,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 701070548, now seen corresponding path program 32 times [2024-06-14 13:56:40,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:40,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574925234] [2024-06-14 13:56:40,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:40,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:40,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:40,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574925234] [2024-06-14 13:56:40,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574925234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:40,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:40,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:56:40,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623841574] [2024-06-14 13:56:40,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:40,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:56:40,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:40,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:56:40,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:56:40,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:40,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 557 transitions, 9669 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:40,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:40,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:40,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:41,390 INFO L124 PetriNetUnfolderBase]: 2241/3787 cut-off events. [2024-06-14 13:56:41,390 INFO L125 PetriNetUnfolderBase]: For 282477/282477 co-relation queries the response was YES. [2024-06-14 13:56:41,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29672 conditions, 3787 events. 2241/3787 cut-off events. For 282477/282477 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 23788 event pairs, 365 based on Foata normal form. 1/3788 useless extension candidates. Maximal degree in co-relation 29488. Up to 3079 conditions per place. [2024-06-14 13:56:41,446 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 222 changer transitions 0/591 dead transitions. [2024-06-14 13:56:41,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 591 transitions, 11115 flow [2024-06-14 13:56:41,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-14 13:56:41,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-14 13:56:41,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 327 transitions. [2024-06-14 13:56:41,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49847560975609756 [2024-06-14 13:56:41,447 INFO L175 Difference]: Start difference. First operand has 445 places, 557 transitions, 9669 flow. Second operand 16 states and 327 transitions. [2024-06-14 13:56:41,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 591 transitions, 11115 flow [2024-06-14 13:56:43,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 591 transitions, 10611 flow, removed 35 selfloop flow, removed 14 redundant places. [2024-06-14 13:56:43,469 INFO L231 Difference]: Finished difference. Result has 447 places, 557 transitions, 9615 flow [2024-06-14 13:56:43,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9165, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9615, PETRI_PLACES=447, PETRI_TRANSITIONS=557} [2024-06-14 13:56:43,469 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-14 13:56:43,469 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 557 transitions, 9615 flow [2024-06-14 13:56:43,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:43,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:43,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:43,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 13:56:43,470 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:43,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:43,470 INFO L85 PathProgramCache]: Analyzing trace with hash 542188418, now seen corresponding path program 33 times [2024-06-14 13:56:43,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:43,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257203647] [2024-06-14 13:56:43,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:43,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:43,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:43,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:43,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257203647] [2024-06-14 13:56:43,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257203647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:43,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:43,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:56:43,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722536479] [2024-06-14 13:56:43,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:43,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:56:43,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:43,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:56:43,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:56:43,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:43,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 557 transitions, 9615 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:43,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:43,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:43,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:44,614 INFO L124 PetriNetUnfolderBase]: 2238/3783 cut-off events. [2024-06-14 13:56:44,614 INFO L125 PetriNetUnfolderBase]: For 282763/282763 co-relation queries the response was YES. [2024-06-14 13:56:44,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29538 conditions, 3783 events. 2238/3783 cut-off events. For 282763/282763 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 23784 event pairs, 367 based on Foata normal form. 1/3784 useless extension candidates. Maximal degree in co-relation 29353. Up to 3076 conditions per place. [2024-06-14 13:56:44,671 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 365 selfloop transitions, 215 changer transitions 0/586 dead transitions. [2024-06-14 13:56:44,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 586 transitions, 10851 flow [2024-06-14 13:56:44,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:56:44,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:56:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-14 13:56:44,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223577235772358 [2024-06-14 13:56:44,672 INFO L175 Difference]: Start difference. First operand has 447 places, 557 transitions, 9615 flow. Second operand 12 states and 257 transitions. [2024-06-14 13:56:44,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 586 transitions, 10851 flow [2024-06-14 13:56:46,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 586 transitions, 10434 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-14 13:56:46,665 INFO L231 Difference]: Finished difference. Result has 447 places, 557 transitions, 9634 flow [2024-06-14 13:56:46,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9198, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9634, PETRI_PLACES=447, PETRI_TRANSITIONS=557} [2024-06-14 13:56:46,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 405 predicate places. [2024-06-14 13:56:46,666 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 557 transitions, 9634 flow [2024-06-14 13:56:46,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:46,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:46,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:46,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 13:56:46,667 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:46,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:46,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1916250012, now seen corresponding path program 34 times [2024-06-14 13:56:46,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:46,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242685446] [2024-06-14 13:56:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:46,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:46,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:46,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242685446] [2024-06-14 13:56:46,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242685446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:46,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:46,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:56:46,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925853098] [2024-06-14 13:56:46,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:46,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:56:46,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:56:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:56:47,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:47,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 557 transitions, 9634 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:47,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:47,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:47,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:47,932 INFO L124 PetriNetUnfolderBase]: 2243/3791 cut-off events. [2024-06-14 13:56:47,932 INFO L125 PetriNetUnfolderBase]: For 289212/289212 co-relation queries the response was YES. [2024-06-14 13:56:47,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29647 conditions, 3791 events. 2243/3791 cut-off events. For 289212/289212 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 23830 event pairs, 382 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 29461. Up to 3093 conditions per place. [2024-06-14 13:56:47,980 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 396 selfloop transitions, 181 changer transitions 0/583 dead transitions. [2024-06-14 13:56:47,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 583 transitions, 11091 flow [2024-06-14 13:56:47,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 13:56:47,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:56:47,980 INFO L175 Difference]: Start difference. First operand has 447 places, 557 transitions, 9634 flow. Second operand 9 states and 198 transitions. [2024-06-14 13:56:47,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 583 transitions, 11091 flow [2024-06-14 13:56:49,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 583 transitions, 10586 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-06-14 13:56:49,829 INFO L231 Difference]: Finished difference. Result has 442 places, 560 transitions, 9562 flow [2024-06-14 13:56:49,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9129, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9562, PETRI_PLACES=442, PETRI_TRANSITIONS=560} [2024-06-14 13:56:49,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 400 predicate places. [2024-06-14 13:56:49,829 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 560 transitions, 9562 flow [2024-06-14 13:56:49,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:49,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:49,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:49,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 13:56:49,829 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:49,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:49,830 INFO L85 PathProgramCache]: Analyzing trace with hash 585514464, now seen corresponding path program 35 times [2024-06-14 13:56:49,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:49,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058526707] [2024-06-14 13:56:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:49,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:50,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:50,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058526707] [2024-06-14 13:56:50,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058526707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:50,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:50,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:56:50,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908235813] [2024-06-14 13:56:50,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:50,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:56:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:56:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:56:50,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:50,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 560 transitions, 9562 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:50,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:50,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:50,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:50,959 INFO L124 PetriNetUnfolderBase]: 2240/3791 cut-off events. [2024-06-14 13:56:50,959 INFO L125 PetriNetUnfolderBase]: For 289573/289573 co-relation queries the response was YES. [2024-06-14 13:56:51,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29534 conditions, 3791 events. 2240/3791 cut-off events. For 289573/289573 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 23895 event pairs, 384 based on Foata normal form. 1/3791 useless extension candidates. Maximal degree in co-relation 29347. Up to 3090 conditions per place. [2024-06-14 13:56:51,016 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 399 selfloop transitions, 172 changer transitions 0/577 dead transitions. [2024-06-14 13:56:51,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 577 transitions, 10746 flow [2024-06-14 13:56:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:51,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:56:51,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 13:56:51,017 INFO L175 Difference]: Start difference. First operand has 442 places, 560 transitions, 9562 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:56:51,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 577 transitions, 10746 flow [2024-06-14 13:56:52,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 577 transitions, 10155 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-14 13:56:52,951 INFO L231 Difference]: Finished difference. Result has 439 places, 560 transitions, 9335 flow [2024-06-14 13:56:52,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8971, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9335, PETRI_PLACES=439, PETRI_TRANSITIONS=560} [2024-06-14 13:56:52,951 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-14 13:56:52,951 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 560 transitions, 9335 flow [2024-06-14 13:56:52,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:52,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:52,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:52,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 13:56:52,952 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:52,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:52,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1774789497, now seen corresponding path program 7 times [2024-06-14 13:56:52,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:52,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380003553] [2024-06-14 13:56:52,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:53,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:53,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380003553] [2024-06-14 13:56:53,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380003553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:53,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:53,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:53,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591258481] [2024-06-14 13:56:53,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:53,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:53,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:53,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:53,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:53,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:53,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 560 transitions, 9335 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:53,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:53,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:53,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:54,044 INFO L124 PetriNetUnfolderBase]: 2248/3805 cut-off events. [2024-06-14 13:56:54,044 INFO L125 PetriNetUnfolderBase]: For 289718/289720 co-relation queries the response was YES. [2024-06-14 13:56:54,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29447 conditions, 3805 events. 2248/3805 cut-off events. For 289718/289720 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 24013 event pairs, 374 based on Foata normal form. 4/3809 useless extension candidates. Maximal degree in co-relation 29261. Up to 3312 conditions per place. [2024-06-14 13:56:54,100 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 502 selfloop transitions, 76 changer transitions 0/584 dead transitions. [2024-06-14 13:56:54,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 584 transitions, 10599 flow [2024-06-14 13:56:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:56:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:56:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 13:56:54,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 13:56:54,101 INFO L175 Difference]: Start difference. First operand has 439 places, 560 transitions, 9335 flow. Second operand 10 states and 205 transitions. [2024-06-14 13:56:54,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 584 transitions, 10599 flow [2024-06-14 13:56:56,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 584 transitions, 10232 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 13:56:56,028 INFO L231 Difference]: Finished difference. Result has 441 places, 562 transitions, 9179 flow [2024-06-14 13:56:56,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8968, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9179, PETRI_PLACES=441, PETRI_TRANSITIONS=562} [2024-06-14 13:56:56,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-14 13:56:56,029 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 562 transitions, 9179 flow [2024-06-14 13:56:56,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:56,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:56,029 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, 1] [2024-06-14 13:56:56,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 13:56:56,030 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:56,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:56,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1806237317, now seen corresponding path program 8 times [2024-06-14 13:56:56,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:56,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071083574] [2024-06-14 13:56:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:56,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:56,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:56,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071083574] [2024-06-14 13:56:56,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071083574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:56,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:56,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:56:56,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126915897] [2024-06-14 13:56:56,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:56,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:56:56,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:56,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:56:56,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:56:56,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:56,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 562 transitions, 9179 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:56,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:56,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:56,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:57,140 INFO L124 PetriNetUnfolderBase]: 2269/3830 cut-off events. [2024-06-14 13:56:57,140 INFO L125 PetriNetUnfolderBase]: For 293473/293475 co-relation queries the response was YES. [2024-06-14 13:56:57,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29717 conditions, 3830 events. 2269/3830 cut-off events. For 293473/293475 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 24145 event pairs, 371 based on Foata normal form. 4/3834 useless extension candidates. Maximal degree in co-relation 29532. Up to 3314 conditions per place. [2024-06-14 13:56:57,198 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 500 selfloop transitions, 84 changer transitions 0/590 dead transitions. [2024-06-14 13:56:57,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 590 transitions, 10709 flow [2024-06-14 13:56:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:56:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:56:57,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 13:56:57,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-14 13:56:57,199 INFO L175 Difference]: Start difference. First operand has 441 places, 562 transitions, 9179 flow. Second operand 10 states and 207 transitions. [2024-06-14 13:56:57,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 590 transitions, 10709 flow [2024-06-14 13:56:59,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 590 transitions, 10514 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 13:56:59,217 INFO L231 Difference]: Finished difference. Result has 443 places, 566 transitions, 9269 flow [2024-06-14 13:56:59,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8984, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9269, PETRI_PLACES=443, PETRI_TRANSITIONS=566} [2024-06-14 13:56:59,217 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-14 13:56:59,217 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 566 transitions, 9269 flow [2024-06-14 13:56:59,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:59,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:59,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:59,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 13:56:59,218 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:59,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:59,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1767445008, now seen corresponding path program 36 times [2024-06-14 13:56:59,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:59,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985220967] [2024-06-14 13:56:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:59,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:59,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:59,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985220967] [2024-06-14 13:56:59,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985220967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:59,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:59,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:56:59,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631503633] [2024-06-14 13:56:59,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:59,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:56:59,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:59,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:56:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:56:59,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:59,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 566 transitions, 9269 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:59,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:59,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:59,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:00,328 INFO L124 PetriNetUnfolderBase]: 2282/3858 cut-off events. [2024-06-14 13:57:00,328 INFO L125 PetriNetUnfolderBase]: For 299746/299748 co-relation queries the response was YES. [2024-06-14 13:57:00,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30068 conditions, 3858 events. 2282/3858 cut-off events. For 299746/299748 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 24368 event pairs, 377 based on Foata normal form. 3/3861 useless extension candidates. Maximal degree in co-relation 29882. Up to 2924 conditions per place. [2024-06-14 13:57:00,387 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 336 changer transitions 0/601 dead transitions. [2024-06-14 13:57:00,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 601 transitions, 11037 flow [2024-06-14 13:57:00,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:57:00,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:57:00,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 271 transitions. [2024-06-14 13:57:00,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084427767354597 [2024-06-14 13:57:00,388 INFO L175 Difference]: Start difference. First operand has 443 places, 566 transitions, 9269 flow. Second operand 13 states and 271 transitions. [2024-06-14 13:57:00,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 601 transitions, 11037 flow [2024-06-14 13:57:02,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 601 transitions, 10879 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:02,619 INFO L231 Difference]: Finished difference. Result has 450 places, 572 transitions, 9905 flow [2024-06-14 13:57:02,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9111, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9905, PETRI_PLACES=450, PETRI_TRANSITIONS=572} [2024-06-14 13:57:02,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-14 13:57:02,620 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 572 transitions, 9905 flow [2024-06-14 13:57:02,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:02,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:02,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:02,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 13:57:02,620 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:02,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1774796658, now seen corresponding path program 37 times [2024-06-14 13:57:02,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:02,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328798302] [2024-06-14 13:57:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:02,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:02,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:02,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328798302] [2024-06-14 13:57:02,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328798302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:02,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:02,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:57:02,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355656899] [2024-06-14 13:57:02,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:02,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:57:02,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:02,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:57:02,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:57:02,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:02,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 572 transitions, 9905 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:02,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:02,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:02,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:03,978 INFO L124 PetriNetUnfolderBase]: 2295/3876 cut-off events. [2024-06-14 13:57:03,978 INFO L125 PetriNetUnfolderBase]: For 312072/312074 co-relation queries the response was YES. [2024-06-14 13:57:04,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30966 conditions, 3876 events. 2295/3876 cut-off events. For 312072/312074 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 24491 event pairs, 375 based on Foata normal form. 3/3879 useless extension candidates. Maximal degree in co-relation 30778. Up to 2939 conditions per place. [2024-06-14 13:57:04,029 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 262 selfloop transitions, 342 changer transitions 0/610 dead transitions. [2024-06-14 13:57:04,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 610 transitions, 11909 flow [2024-06-14 13:57:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:57:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:57:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 309 transitions. [2024-06-14 13:57:04,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024390243902439 [2024-06-14 13:57:04,030 INFO L175 Difference]: Start difference. First operand has 450 places, 572 transitions, 9905 flow. Second operand 15 states and 309 transitions. [2024-06-14 13:57:04,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 610 transitions, 11909 flow [2024-06-14 13:57:06,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 610 transitions, 11316 flow, removed 52 selfloop flow, removed 9 redundant places. [2024-06-14 13:57:06,397 INFO L231 Difference]: Finished difference. Result has 456 places, 578 transitions, 10130 flow [2024-06-14 13:57:06,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9350, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10130, PETRI_PLACES=456, PETRI_TRANSITIONS=578} [2024-06-14 13:57:06,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 13:57:06,398 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 578 transitions, 10130 flow [2024-06-14 13:57:06,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:06,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:06,398 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, 1] [2024-06-14 13:57:06,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 13:57:06,398 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:06,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:06,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1324067975, now seen corresponding path program 9 times [2024-06-14 13:57:06,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:06,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987752618] [2024-06-14 13:57:06,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:06,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:06,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:06,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:06,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987752618] [2024-06-14 13:57:06,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987752618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:06,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:06,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:06,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334362330] [2024-06-14 13:57:06,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:06,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:06,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:06,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:06,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:06,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:06,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 578 transitions, 10130 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:06,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:06,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:06,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:07,523 INFO L124 PetriNetUnfolderBase]: 2290/3869 cut-off events. [2024-06-14 13:57:07,524 INFO L125 PetriNetUnfolderBase]: For 313032/313034 co-relation queries the response was YES. [2024-06-14 13:57:07,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30743 conditions, 3869 events. 2290/3869 cut-off events. For 313032/313034 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 24493 event pairs, 374 based on Foata normal form. 4/3873 useless extension candidates. Maximal degree in co-relation 30554. Up to 3372 conditions per place. [2024-06-14 13:57:07,583 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 519 selfloop transitions, 74 changer transitions 0/599 dead transitions. [2024-06-14 13:57:07,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 599 transitions, 11372 flow [2024-06-14 13:57:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:07,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 13:57:07,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:57:07,584 INFO L175 Difference]: Start difference. First operand has 456 places, 578 transitions, 10130 flow. Second operand 9 states and 189 transitions. [2024-06-14 13:57:07,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 599 transitions, 11372 flow [2024-06-14 13:57:09,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 599 transitions, 10660 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-14 13:57:09,744 INFO L231 Difference]: Finished difference. Result has 455 places, 578 transitions, 9571 flow [2024-06-14 13:57:09,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9418, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9571, PETRI_PLACES=455, PETRI_TRANSITIONS=578} [2024-06-14 13:57:09,744 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-14 13:57:09,744 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 578 transitions, 9571 flow [2024-06-14 13:57:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:09,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:09,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:09,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 13:57:09,745 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:09,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1332638855, now seen corresponding path program 10 times [2024-06-14 13:57:09,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:09,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176573220] [2024-06-14 13:57:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:09,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:10,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:10,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:10,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176573220] [2024-06-14 13:57:10,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176573220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:10,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:10,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:10,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045956083] [2024-06-14 13:57:10,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:10,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:10,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:10,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:10,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:10,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:10,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 578 transitions, 9571 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:10,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:10,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:10,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:10,865 INFO L124 PetriNetUnfolderBase]: 2311/3900 cut-off events. [2024-06-14 13:57:10,865 INFO L125 PetriNetUnfolderBase]: For 326806/326808 co-relation queries the response was YES. [2024-06-14 13:57:10,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30680 conditions, 3900 events. 2311/3900 cut-off events. For 326806/326808 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 24628 event pairs, 375 based on Foata normal form. 4/3904 useless extension candidates. Maximal degree in co-relation 30489. Up to 3368 conditions per place. [2024-06-14 13:57:10,927 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 518 selfloop transitions, 82 changer transitions 0/606 dead transitions. [2024-06-14 13:57:10,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 606 transitions, 11157 flow [2024-06-14 13:57:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:10,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:10,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-14 13:57:10,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-14 13:57:10,928 INFO L175 Difference]: Start difference. First operand has 455 places, 578 transitions, 9571 flow. Second operand 9 states and 191 transitions. [2024-06-14 13:57:10,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 606 transitions, 11157 flow [2024-06-14 13:57:13,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 606 transitions, 10970 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 13:57:13,127 INFO L231 Difference]: Finished difference. Result has 456 places, 583 transitions, 9699 flow [2024-06-14 13:57:13,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9384, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9699, PETRI_PLACES=456, PETRI_TRANSITIONS=583} [2024-06-14 13:57:13,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 13:57:13,127 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 583 transitions, 9699 flow [2024-06-14 13:57:13,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:13,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:13,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:13,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 13:57:13,128 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:13,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:13,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1774802238, now seen corresponding path program 38 times [2024-06-14 13:57:13,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:13,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798953517] [2024-06-14 13:57:13,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:13,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:13,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:13,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798953517] [2024-06-14 13:57:13,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798953517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:13,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:13,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:57:13,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760062189] [2024-06-14 13:57:13,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:13,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:57:13,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:57:13,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:57:13,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:13,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 583 transitions, 9699 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:13,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:13,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:13,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:14,304 INFO L124 PetriNetUnfolderBase]: 2308/3900 cut-off events. [2024-06-14 13:57:14,304 INFO L125 PetriNetUnfolderBase]: For 324333/324335 co-relation queries the response was YES. [2024-06-14 13:57:14,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30759 conditions, 3900 events. 2308/3900 cut-off events. For 324333/324335 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 24708 event pairs, 379 based on Foata normal form. 3/3903 useless extension candidates. Maximal degree in co-relation 30566. Up to 2960 conditions per place. [2024-06-14 13:57:14,363 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 265 selfloop transitions, 344 changer transitions 0/615 dead transitions. [2024-06-14 13:57:14,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 615 transitions, 11401 flow [2024-06-14 13:57:14,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-14 13:57:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-14 13:57:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 322 transitions. [2024-06-14 13:57:14,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-14 13:57:14,364 INFO L175 Difference]: Start difference. First operand has 456 places, 583 transitions, 9699 flow. Second operand 16 states and 322 transitions. [2024-06-14 13:57:14,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 615 transitions, 11401 flow [2024-06-14 13:57:16,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 615 transitions, 11223 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:16,732 INFO L231 Difference]: Finished difference. Result has 467 places, 583 transitions, 10215 flow [2024-06-14 13:57:16,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9521, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10215, PETRI_PLACES=467, PETRI_TRANSITIONS=583} [2024-06-14 13:57:16,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-14 13:57:16,733 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 583 transitions, 10215 flow [2024-06-14 13:57:16,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:16,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:16,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:16,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 13:57:16,733 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:16,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:16,733 INFO L85 PathProgramCache]: Analyzing trace with hash 310542613, now seen corresponding path program 11 times [2024-06-14 13:57:16,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:16,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335682379] [2024-06-14 13:57:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:16,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:17,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:17,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335682379] [2024-06-14 13:57:17,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335682379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:17,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:17,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:17,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624306696] [2024-06-14 13:57:17,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:17,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:17,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:17,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:17,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:17,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:17,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 583 transitions, 10215 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:17,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:17,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:17,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:17,876 INFO L124 PetriNetUnfolderBase]: 2303/3888 cut-off events. [2024-06-14 13:57:17,876 INFO L125 PetriNetUnfolderBase]: For 323946/323946 co-relation queries the response was YES. [2024-06-14 13:57:17,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31079 conditions, 3888 events. 2303/3888 cut-off events. For 323946/323946 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 24556 event pairs, 371 based on Foata normal form. 2/3890 useless extension candidates. Maximal degree in co-relation 30884. Up to 3386 conditions per place. [2024-06-14 13:57:17,936 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 526 selfloop transitions, 80 changer transitions 0/612 dead transitions. [2024-06-14 13:57:17,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 612 transitions, 11522 flow [2024-06-14 13:57:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:57:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:57:17,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-14 13:57:17,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-14 13:57:17,937 INFO L175 Difference]: Start difference. First operand has 467 places, 583 transitions, 10215 flow. Second operand 10 states and 213 transitions. [2024-06-14 13:57:17,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 612 transitions, 11522 flow [2024-06-14 13:57:19,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 612 transitions, 10786 flow, removed 22 selfloop flow, removed 15 redundant places. [2024-06-14 13:57:19,713 INFO L231 Difference]: Finished difference. Result has 462 places, 584 transitions, 9670 flow [2024-06-14 13:57:19,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9489, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9670, PETRI_PLACES=462, PETRI_TRANSITIONS=584} [2024-06-14 13:57:19,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-14 13:57:19,713 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 584 transitions, 9670 flow [2024-06-14 13:57:19,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:19,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:19,713 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, 1] [2024-06-14 13:57:19,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 13:57:19,714 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:19,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:19,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1863740125, now seen corresponding path program 12 times [2024-06-14 13:57:19,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:19,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52231461] [2024-06-14 13:57:19,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:19,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:19,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:20,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:20,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52231461] [2024-06-14 13:57:20,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52231461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:20,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:20,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:20,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926759815] [2024-06-14 13:57:20,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:20,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:20,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:20,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:20,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:20,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:20,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 584 transitions, 9670 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:20,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:20,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:20,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:20,873 INFO L124 PetriNetUnfolderBase]: 2311/3905 cut-off events. [2024-06-14 13:57:20,873 INFO L125 PetriNetUnfolderBase]: For 328911/328913 co-relation queries the response was YES. [2024-06-14 13:57:20,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30651 conditions, 3905 events. 2311/3905 cut-off events. For 328911/328913 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 24778 event pairs, 333 based on Foata normal form. 4/3909 useless extension candidates. Maximal degree in co-relation 30455. Up to 3257 conditions per place. [2024-06-14 13:57:20,931 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 498 selfloop transitions, 109 changer transitions 0/613 dead transitions. [2024-06-14 13:57:20,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 613 transitions, 11286 flow [2024-06-14 13:57:20,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:20,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 13:57:20,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:57:20,932 INFO L175 Difference]: Start difference. First operand has 462 places, 584 transitions, 9670 flow. Second operand 9 states and 192 transitions. [2024-06-14 13:57:20,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 613 transitions, 11286 flow [2024-06-14 13:57:23,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 613 transitions, 11185 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:23,127 INFO L231 Difference]: Finished difference. Result has 467 places, 589 transitions, 9944 flow [2024-06-14 13:57:23,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9569, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9944, PETRI_PLACES=467, PETRI_TRANSITIONS=589} [2024-06-14 13:57:23,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-14 13:57:23,127 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 589 transitions, 9944 flow [2024-06-14 13:57:23,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:23,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:23,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:23,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 13:57:23,127 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:23,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:23,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2113823609, now seen corresponding path program 13 times [2024-06-14 13:57:23,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:23,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720417590] [2024-06-14 13:57:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:23,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:23,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:23,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:23,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720417590] [2024-06-14 13:57:23,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720417590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:23,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:23,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:23,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535127673] [2024-06-14 13:57:23,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:23,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:23,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:23,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:23,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:23,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:23,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 589 transitions, 9944 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:23,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:23,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:23,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:24,290 INFO L124 PetriNetUnfolderBase]: 2319/3917 cut-off events. [2024-06-14 13:57:24,290 INFO L125 PetriNetUnfolderBase]: For 337572/337574 co-relation queries the response was YES. [2024-06-14 13:57:24,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31122 conditions, 3917 events. 2319/3917 cut-off events. For 337572/337574 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 24849 event pairs, 336 based on Foata normal form. 4/3921 useless extension candidates. Maximal degree in co-relation 30924. Up to 3265 conditions per place. [2024-06-14 13:57:24,351 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 499 selfloop transitions, 110 changer transitions 0/615 dead transitions. [2024-06-14 13:57:24,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 615 transitions, 11500 flow [2024-06-14 13:57:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 13:57:24,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:57:24,352 INFO L175 Difference]: Start difference. First operand has 467 places, 589 transitions, 9944 flow. Second operand 9 states and 192 transitions. [2024-06-14 13:57:24,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 615 transitions, 11500 flow [2024-06-14 13:57:26,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 615 transitions, 11079 flow, removed 56 selfloop flow, removed 12 redundant places. [2024-06-14 13:57:26,784 INFO L231 Difference]: Finished difference. Result has 464 places, 591 transitions, 9816 flow [2024-06-14 13:57:26,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9545, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9816, PETRI_PLACES=464, PETRI_TRANSITIONS=591} [2024-06-14 13:57:26,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-14 13:57:26,784 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 591 transitions, 9816 flow [2024-06-14 13:57:26,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:26,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:26,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:26,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 13:57:26,785 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:26,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:26,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1581327722, now seen corresponding path program 39 times [2024-06-14 13:57:26,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:26,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800220196] [2024-06-14 13:57:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:26,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:27,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:27,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800220196] [2024-06-14 13:57:27,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800220196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:27,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:27,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:57:27,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872101389] [2024-06-14 13:57:27,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:27,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:57:27,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:27,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:57:27,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:57:27,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:27,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 591 transitions, 9816 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:27,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:27,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:27,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:27,957 INFO L124 PetriNetUnfolderBase]: 2324/3921 cut-off events. [2024-06-14 13:57:27,957 INFO L125 PetriNetUnfolderBase]: For 332396/332396 co-relation queries the response was YES. [2024-06-14 13:57:28,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30768 conditions, 3921 events. 2324/3921 cut-off events. For 332396/332396 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 24832 event pairs, 374 based on Foata normal form. 1/3922 useless extension candidates. Maximal degree in co-relation 30571. Up to 3478 conditions per place. [2024-06-14 13:57:28,016 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 576 selfloop transitions, 33 changer transitions 0/615 dead transitions. [2024-06-14 13:57:28,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 615 transitions, 11135 flow [2024-06-14 13:57:28,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:57:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:57:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 13:57:28,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-14 13:57:28,018 INFO L175 Difference]: Start difference. First operand has 464 places, 591 transitions, 9816 flow. Second operand 10 states and 203 transitions. [2024-06-14 13:57:28,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 615 transitions, 11135 flow [2024-06-14 13:57:30,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 615 transitions, 10926 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:30,414 INFO L231 Difference]: Finished difference. Result has 468 places, 594 transitions, 9730 flow [2024-06-14 13:57:30,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9607, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9730, PETRI_PLACES=468, PETRI_TRANSITIONS=594} [2024-06-14 13:57:30,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-14 13:57:30,415 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 594 transitions, 9730 flow [2024-06-14 13:57:30,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:30,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:30,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:30,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 13:57:30,415 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:30,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:30,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1324060814, now seen corresponding path program 40 times [2024-06-14 13:57:30,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:30,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493310313] [2024-06-14 13:57:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:30,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:30,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:30,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493310313] [2024-06-14 13:57:30,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493310313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:30,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:30,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:57:30,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280400421] [2024-06-14 13:57:30,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:30,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:57:30,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:30,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:57:30,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:57:30,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:30,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 594 transitions, 9730 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:30,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:30,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:30,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:31,675 INFO L124 PetriNetUnfolderBase]: 2329/3931 cut-off events. [2024-06-14 13:57:31,675 INFO L125 PetriNetUnfolderBase]: For 339024/339026 co-relation queries the response was YES. [2024-06-14 13:57:31,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30608 conditions, 3931 events. 2329/3931 cut-off events. For 339024/339026 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 24945 event pairs, 380 based on Foata normal form. 3/3934 useless extension candidates. Maximal degree in co-relation 30410. Up to 2989 conditions per place. [2024-06-14 13:57:31,727 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 349 changer transitions 0/626 dead transitions. [2024-06-14 13:57:31,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 626 transitions, 11519 flow [2024-06-14 13:57:31,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:57:31,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:57:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-14 13:57:31,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:57:31,728 INFO L175 Difference]: Start difference. First operand has 468 places, 594 transitions, 9730 flow. Second operand 13 states and 273 transitions. [2024-06-14 13:57:31,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 626 transitions, 11519 flow [2024-06-14 13:57:33,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 626 transitions, 11432 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:57:34,006 INFO L231 Difference]: Finished difference. Result has 474 places, 597 transitions, 10398 flow [2024-06-14 13:57:34,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9643, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10398, PETRI_PLACES=474, PETRI_TRANSITIONS=597} [2024-06-14 13:57:34,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-14 13:57:34,007 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 597 transitions, 10398 flow [2024-06-14 13:57:34,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:34,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:34,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:34,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 13:57:34,007 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:34,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:34,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1262146405, now seen corresponding path program 14 times [2024-06-14 13:57:34,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:34,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297519547] [2024-06-14 13:57:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:34,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:34,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:34,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297519547] [2024-06-14 13:57:34,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297519547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:34,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:34,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:34,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316636206] [2024-06-14 13:57:34,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:34,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:34,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:34,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:34,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 597 transitions, 10398 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:34,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:34,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:34,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:35,185 INFO L124 PetriNetUnfolderBase]: 2324/3919 cut-off events. [2024-06-14 13:57:35,185 INFO L125 PetriNetUnfolderBase]: For 340735/340735 co-relation queries the response was YES. [2024-06-14 13:57:35,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31056 conditions, 3919 events. 2324/3919 cut-off events. For 340735/340735 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 24830 event pairs, 366 based on Foata normal form. 2/3921 useless extension candidates. Maximal degree in co-relation 30856. Up to 3373 conditions per place. [2024-06-14 13:57:35,248 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 529 selfloop transitions, 92 changer transitions 0/627 dead transitions. [2024-06-14 13:57:35,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 627 transitions, 11738 flow [2024-06-14 13:57:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:57:35,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:57:35,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-14 13:57:35,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-14 13:57:35,249 INFO L175 Difference]: Start difference. First operand has 474 places, 597 transitions, 10398 flow. Second operand 10 states and 214 transitions. [2024-06-14 13:57:35,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 627 transitions, 11738 flow [2024-06-14 13:57:37,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 627 transitions, 10805 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-14 13:57:37,937 INFO L231 Difference]: Finished difference. Result has 474 places, 598 transitions, 9681 flow [2024-06-14 13:57:37,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9477, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9681, PETRI_PLACES=474, PETRI_TRANSITIONS=598} [2024-06-14 13:57:37,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-14 13:57:37,938 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 598 transitions, 9681 flow [2024-06-14 13:57:37,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:37,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:37,938 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, 1] [2024-06-14 13:57:37,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 13:57:37,938 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:37,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:37,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1324055234, now seen corresponding path program 41 times [2024-06-14 13:57:37,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:37,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030532994] [2024-06-14 13:57:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:37,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:37,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:38,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:38,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:38,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030532994] [2024-06-14 13:57:38,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030532994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:38,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:38,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:57:38,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971761527] [2024-06-14 13:57:38,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:38,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:57:38,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:38,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:57:38,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:57:38,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:38,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 598 transitions, 9681 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:38,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:38,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:38,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:39,106 INFO L124 PetriNetUnfolderBase]: 2321/3924 cut-off events. [2024-06-14 13:57:39,106 INFO L125 PetriNetUnfolderBase]: For 333700/333702 co-relation queries the response was YES. [2024-06-14 13:57:39,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29871 conditions, 3924 events. 2321/3924 cut-off events. For 333700/333702 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 24955 event pairs, 381 based on Foata normal form. 3/3927 useless extension candidates. Maximal degree in co-relation 29671. Up to 2979 conditions per place. [2024-06-14 13:57:39,166 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 350 changer transitions 0/628 dead transitions. [2024-06-14 13:57:39,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 628 transitions, 11217 flow [2024-06-14 13:57:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:57:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:57:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 306 transitions. [2024-06-14 13:57:39,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-14 13:57:39,167 INFO L175 Difference]: Start difference. First operand has 474 places, 598 transitions, 9681 flow. Second operand 15 states and 306 transitions. [2024-06-14 13:57:39,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 628 transitions, 11217 flow [2024-06-14 13:57:41,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 628 transitions, 10945 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 13:57:41,438 INFO L231 Difference]: Finished difference. Result has 480 places, 598 transitions, 10115 flow [2024-06-14 13:57:41,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9409, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10115, PETRI_PLACES=480, PETRI_TRANSITIONS=598} [2024-06-14 13:57:41,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-14 13:57:41,439 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 598 transitions, 10115 flow [2024-06-14 13:57:41,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:41,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:41,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:41,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 13:57:41,439 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:41,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:41,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1903351842, now seen corresponding path program 42 times [2024-06-14 13:57:41,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:41,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495625541] [2024-06-14 13:57:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:41,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:41,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:41,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495625541] [2024-06-14 13:57:41,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495625541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:41,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:41,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:57:41,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611629192] [2024-06-14 13:57:41,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:41,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:57:41,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:41,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:57:41,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:57:41,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:41,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 598 transitions, 10115 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:41,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:41,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:41,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:42,600 INFO L124 PetriNetUnfolderBase]: 2326/3928 cut-off events. [2024-06-14 13:57:42,601 INFO L125 PetriNetUnfolderBase]: For 339797/339797 co-relation queries the response was YES. [2024-06-14 13:57:42,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30450 conditions, 3928 events. 2326/3928 cut-off events. For 339797/339797 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 24906 event pairs, 374 based on Foata normal form. 1/3929 useless extension candidates. Maximal degree in co-relation 30249. Up to 2985 conditions per place. [2024-06-14 13:57:42,661 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 345 changer transitions 0/632 dead transitions. [2024-06-14 13:57:42,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 632 transitions, 11721 flow [2024-06-14 13:57:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:57:42,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:57:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 13:57:42,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:57:42,662 INFO L175 Difference]: Start difference. First operand has 480 places, 598 transitions, 10115 flow. Second operand 10 states and 225 transitions. [2024-06-14 13:57:42,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 632 transitions, 11721 flow [2024-06-14 13:57:45,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 632 transitions, 10997 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-14 13:57:45,196 INFO L231 Difference]: Finished difference. Result has 476 places, 601 transitions, 10145 flow [2024-06-14 13:57:45,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10145, PETRI_PLACES=476, PETRI_TRANSITIONS=601} [2024-06-14 13:57:45,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-14 13:57:45,196 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 601 transitions, 10145 flow [2024-06-14 13:57:45,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:45,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:45,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:45,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 13:57:45,197 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:45,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:45,197 INFO L85 PathProgramCache]: Analyzing trace with hash 757278024, now seen corresponding path program 43 times [2024-06-14 13:57:45,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:45,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905176131] [2024-06-14 13:57:45,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:45,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:45,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:45,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905176131] [2024-06-14 13:57:45,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905176131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:45,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:45,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:57:45,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884372328] [2024-06-14 13:57:45,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:45,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:57:45,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:45,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:57:45,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:57:45,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:45,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 601 transitions, 10145 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:45,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:45,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:45,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:46,378 INFO L124 PetriNetUnfolderBase]: 2331/3941 cut-off events. [2024-06-14 13:57:46,379 INFO L125 PetriNetUnfolderBase]: For 345580/345580 co-relation queries the response was YES. [2024-06-14 13:57:46,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30555 conditions, 3941 events. 2331/3941 cut-off events. For 345580/345580 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 25092 event pairs, 376 based on Foata normal form. 1/3942 useless extension candidates. Maximal degree in co-relation 30353. Up to 2991 conditions per place. [2024-06-14 13:57:46,439 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 267 selfloop transitions, 367 changer transitions 0/640 dead transitions. [2024-06-14 13:57:46,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 640 transitions, 11779 flow [2024-06-14 13:57:46,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:57:46,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:57:46,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 311 transitions. [2024-06-14 13:57:46,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056910569105691 [2024-06-14 13:57:46,440 INFO L175 Difference]: Start difference. First operand has 476 places, 601 transitions, 10145 flow. Second operand 15 states and 311 transitions. [2024-06-14 13:57:46,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 640 transitions, 11779 flow [2024-06-14 13:57:48,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 640 transitions, 11263 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 13:57:48,857 INFO L231 Difference]: Finished difference. Result has 483 places, 604 transitions, 10429 flow [2024-06-14 13:57:48,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9634, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10429, PETRI_PLACES=483, PETRI_TRANSITIONS=604} [2024-06-14 13:57:48,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-14 13:57:48,858 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 604 transitions, 10429 flow [2024-06-14 13:57:48,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:48,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:48,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:48,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 13:57:48,858 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:48,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1269086716, now seen corresponding path program 44 times [2024-06-14 13:57:48,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:48,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569280514] [2024-06-14 13:57:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:48,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:49,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:49,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569280514] [2024-06-14 13:57:49,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569280514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:49,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:49,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:57:49,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586844051] [2024-06-14 13:57:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:49,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:57:49,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:57:49,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:57:49,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:49,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 604 transitions, 10429 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:49,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:49,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:49,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:50,093 INFO L124 PetriNetUnfolderBase]: 2336/3950 cut-off events. [2024-06-14 13:57:50,093 INFO L125 PetriNetUnfolderBase]: For 347223/347223 co-relation queries the response was YES. [2024-06-14 13:57:50,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30736 conditions, 3950 events. 2336/3950 cut-off events. For 347223/347223 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 25157 event pairs, 376 based on Foata normal form. 1/3951 useless extension candidates. Maximal degree in co-relation 30534. Up to 2997 conditions per place. [2024-06-14 13:57:50,157 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 362 changer transitions 0/641 dead transitions. [2024-06-14 13:57:50,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 641 transitions, 12064 flow [2024-06-14 13:57:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:57:50,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:57:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-06-14 13:57:50,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234521575984991 [2024-06-14 13:57:50,158 INFO L175 Difference]: Start difference. First operand has 483 places, 604 transitions, 10429 flow. Second operand 13 states and 279 transitions. [2024-06-14 13:57:50,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 641 transitions, 12064 flow [2024-06-14 13:57:52,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 641 transitions, 11204 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-06-14 13:57:52,957 INFO L231 Difference]: Finished difference. Result has 484 places, 607 transitions, 10362 flow [2024-06-14 13:57:52,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9584, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10362, PETRI_PLACES=484, PETRI_TRANSITIONS=607} [2024-06-14 13:57:52,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-14 13:57:52,958 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 607 transitions, 10362 flow [2024-06-14 13:57:52,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:52,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:52,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:52,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 13:57:52,958 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:52,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:52,958 INFO L85 PathProgramCache]: Analyzing trace with hash 757283604, now seen corresponding path program 45 times [2024-06-14 13:57:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:52,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74553208] [2024-06-14 13:57:52,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:52,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:53,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:53,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74553208] [2024-06-14 13:57:53,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74553208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:53,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:53,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:57:53,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646978453] [2024-06-14 13:57:53,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:53,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:57:53,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:57:53,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:57:53,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:53,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 607 transitions, 10362 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:53,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:53,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:53,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:54,163 INFO L124 PetriNetUnfolderBase]: 2333/3946 cut-off events. [2024-06-14 13:57:54,163 INFO L125 PetriNetUnfolderBase]: For 340939/340939 co-relation queries the response was YES. [2024-06-14 13:57:54,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30541 conditions, 3946 events. 2333/3946 cut-off events. For 340939/340939 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 25122 event pairs, 376 based on Foata normal form. 1/3947 useless extension candidates. Maximal degree in co-relation 30339. Up to 2994 conditions per place. [2024-06-14 13:57:54,224 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 364 changer transitions 0/641 dead transitions. [2024-06-14 13:57:54,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 641 transitions, 11720 flow [2024-06-14 13:57:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 13:57:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 13:57:54,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 296 transitions. [2024-06-14 13:57:54,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5156794425087108 [2024-06-14 13:57:54,225 INFO L175 Difference]: Start difference. First operand has 484 places, 607 transitions, 10362 flow. Second operand 14 states and 296 transitions. [2024-06-14 13:57:54,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 641 transitions, 11720 flow [2024-06-14 13:57:56,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 641 transitions, 10751 flow, removed 21 selfloop flow, removed 14 redundant places. [2024-06-14 13:57:56,727 INFO L231 Difference]: Finished difference. Result has 484 places, 607 transitions, 10131 flow [2024-06-14 13:57:56,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9393, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10131, PETRI_PLACES=484, PETRI_TRANSITIONS=607} [2024-06-14 13:57:56,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-14 13:57:56,728 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 607 transitions, 10131 flow [2024-06-14 13:57:56,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:56,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:56,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:56,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 13:57:56,728 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:56,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:56,728 INFO L85 PathProgramCache]: Analyzing trace with hash -759093273, now seen corresponding path program 1 times [2024-06-14 13:57:56,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:56,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609276853] [2024-06-14 13:57:56,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:56,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:57,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:57,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609276853] [2024-06-14 13:57:57,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609276853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:57,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:57,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:57:57,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588386751] [2024-06-14 13:57:57,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:57,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:57:57,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:57,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:57:57,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:57:57,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:57,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 607 transitions, 10131 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:57,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:57,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:57,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:57,962 INFO L124 PetriNetUnfolderBase]: 2432/4090 cut-off events. [2024-06-14 13:57:57,962 INFO L125 PetriNetUnfolderBase]: For 457510/457510 co-relation queries the response was YES. [2024-06-14 13:57:58,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32919 conditions, 4090 events. 2432/4090 cut-off events. For 457510/457510 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 26013 event pairs, 276 based on Foata normal form. 6/4095 useless extension candidates. Maximal degree in co-relation 32717. Up to 2878 conditions per place. [2024-06-14 13:57:58,029 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 538 selfloop transitions, 103 changer transitions 0/647 dead transitions. [2024-06-14 13:57:58,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 647 transitions, 12067 flow [2024-06-14 13:57:58,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:58,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:58,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:57:58,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 13:57:58,030 INFO L175 Difference]: Start difference. First operand has 484 places, 607 transitions, 10131 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:57:58,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 647 transitions, 12067 flow [2024-06-14 13:58:00,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 647 transitions, 11239 flow, removed 3 selfloop flow, removed 15 redundant places. [2024-06-14 13:58:00,502 INFO L231 Difference]: Finished difference. Result has 477 places, 610 transitions, 9579 flow [2024-06-14 13:58:00,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9307, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9579, PETRI_PLACES=477, PETRI_TRANSITIONS=610} [2024-06-14 13:58:00,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-14 13:58:00,502 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 610 transitions, 9579 flow [2024-06-14 13:58:00,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:00,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:00,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:00,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 13:58:00,503 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:00,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash -350816865, now seen corresponding path program 1 times [2024-06-14 13:58:00,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:00,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619509876] [2024-06-14 13:58:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:00,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:00,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619509876] [2024-06-14 13:58:00,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619509876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:00,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:00,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:00,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356815050] [2024-06-14 13:58:00,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:00,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:00,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:00,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:00,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:00,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:00,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 610 transitions, 9579 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:00,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:00,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:00,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:01,769 INFO L124 PetriNetUnfolderBase]: 2588/4350 cut-off events. [2024-06-14 13:58:01,770 INFO L125 PetriNetUnfolderBase]: For 552549/552549 co-relation queries the response was YES. [2024-06-14 13:58:01,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36019 conditions, 4350 events. 2588/4350 cut-off events. For 552549/552549 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 27933 event pairs, 316 based on Foata normal form. 6/4355 useless extension candidates. Maximal degree in co-relation 35817. Up to 3387 conditions per place. [2024-06-14 13:58:01,838 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 550 selfloop transitions, 100 changer transitions 0/656 dead transitions. [2024-06-14 13:58:01,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 656 transitions, 11652 flow [2024-06-14 13:58:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:58:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:58:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 13:58:01,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:58:01,839 INFO L175 Difference]: Start difference. First operand has 477 places, 610 transitions, 9579 flow. Second operand 9 states and 210 transitions. [2024-06-14 13:58:01,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 656 transitions, 11652 flow [2024-06-14 13:58:05,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 656 transitions, 11543 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:58:05,535 INFO L231 Difference]: Finished difference. Result has 485 places, 620 transitions, 9900 flow [2024-06-14 13:58:05,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9472, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9900, PETRI_PLACES=485, PETRI_TRANSITIONS=620} [2024-06-14 13:58:05,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-14 13:58:05,536 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 620 transitions, 9900 flow [2024-06-14 13:58:05,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:05,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:05,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:05,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 13:58:05,536 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:05,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:05,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2086064729, now seen corresponding path program 2 times [2024-06-14 13:58:05,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:05,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802838307] [2024-06-14 13:58:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:05,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:05,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802838307] [2024-06-14 13:58:05,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802838307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:05,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:05,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:05,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412440036] [2024-06-14 13:58:05,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:05,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:05,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:05,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:05,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:05,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:05,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 620 transitions, 9900 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:05,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:05,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:05,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:06,974 INFO L124 PetriNetUnfolderBase]: 2608/4386 cut-off events. [2024-06-14 13:58:06,975 INFO L125 PetriNetUnfolderBase]: For 566230/566230 co-relation queries the response was YES. [2024-06-14 13:58:07,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36775 conditions, 4386 events. 2608/4386 cut-off events. For 566230/566230 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 28262 event pairs, 362 based on Foata normal form. 6/4391 useless extension candidates. Maximal degree in co-relation 36569. Up to 3736 conditions per place. [2024-06-14 13:58:07,038 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 586 selfloop transitions, 56 changer transitions 0/648 dead transitions. [2024-06-14 13:58:07,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 648 transitions, 11282 flow [2024-06-14 13:58:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:58:07,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:58:07,039 INFO L175 Difference]: Start difference. First operand has 485 places, 620 transitions, 9900 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:58:07,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 648 transitions, 11282 flow [2024-06-14 13:58:10,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 648 transitions, 11140 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:58:10,575 INFO L231 Difference]: Finished difference. Result has 489 places, 621 transitions, 9894 flow [2024-06-14 13:58:10,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9758, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9894, PETRI_PLACES=489, PETRI_TRANSITIONS=621} [2024-06-14 13:58:10,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 447 predicate places. [2024-06-14 13:58:10,576 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 621 transitions, 9894 flow [2024-06-14 13:58:10,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:10,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:10,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:10,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 13:58:10,576 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:10,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:10,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1625683395, now seen corresponding path program 2 times [2024-06-14 13:58:10,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:10,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074164638] [2024-06-14 13:58:10,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:10,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:10,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:10,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074164638] [2024-06-14 13:58:10,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074164638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:10,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:10,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:10,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187872393] [2024-06-14 13:58:10,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:10,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:10,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:10,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:10,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:10,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:10,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 621 transitions, 9894 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:10,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:10,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:10,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:11,909 INFO L124 PetriNetUnfolderBase]: 2710/4552 cut-off events. [2024-06-14 13:58:11,909 INFO L125 PetriNetUnfolderBase]: For 652001/652001 co-relation queries the response was YES. [2024-06-14 13:58:11,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39512 conditions, 4552 events. 2710/4552 cut-off events. For 652001/652001 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 29390 event pairs, 349 based on Foata normal form. 6/4557 useless extension candidates. Maximal degree in co-relation 39304. Up to 3475 conditions per place. [2024-06-14 13:58:11,983 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 551 selfloop transitions, 103 changer transitions 0/660 dead transitions. [2024-06-14 13:58:11,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 660 transitions, 11930 flow [2024-06-14 13:58:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:58:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:58:11,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 13:58:11,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:58:11,984 INFO L175 Difference]: Start difference. First operand has 489 places, 621 transitions, 9894 flow. Second operand 9 states and 204 transitions. [2024-06-14 13:58:11,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 660 transitions, 11930 flow [2024-06-14 13:58:15,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 660 transitions, 11794 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:58:15,743 INFO L231 Difference]: Finished difference. Result has 492 places, 628 transitions, 10122 flow [2024-06-14 13:58:15,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9768, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10122, PETRI_PLACES=492, PETRI_TRANSITIONS=628} [2024-06-14 13:58:15,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-14 13:58:15,743 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 628 transitions, 10122 flow [2024-06-14 13:58:15,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:15,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:15,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:15,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 13:58:15,744 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:15,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:15,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446245, now seen corresponding path program 3 times [2024-06-14 13:58:15,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:15,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140643261] [2024-06-14 13:58:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:15,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:16,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:16,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140643261] [2024-06-14 13:58:16,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140643261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:16,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:16,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073471492] [2024-06-14 13:58:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:16,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:16,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:16,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:16,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 628 transitions, 10122 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:16,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:16,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:16,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:17,137 INFO L124 PetriNetUnfolderBase]: 2697/4533 cut-off events. [2024-06-14 13:58:17,137 INFO L125 PetriNetUnfolderBase]: For 628886/628886 co-relation queries the response was YES. [2024-06-14 13:58:17,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38956 conditions, 4533 events. 2697/4533 cut-off events. For 628886/628886 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 29352 event pairs, 335 based on Foata normal form. 6/4538 useless extension candidates. Maximal degree in co-relation 38747. Up to 3469 conditions per place. [2024-06-14 13:58:17,217 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 555 selfloop transitions, 101 changer transitions 0/662 dead transitions. [2024-06-14 13:58:17,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 662 transitions, 12046 flow [2024-06-14 13:58:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:58:17,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:58:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 13:58:17,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-14 13:58:17,218 INFO L175 Difference]: Start difference. First operand has 492 places, 628 transitions, 10122 flow. Second operand 9 states and 206 transitions. [2024-06-14 13:58:17,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 662 transitions, 12046 flow [2024-06-14 13:58:21,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 662 transitions, 11874 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 13:58:21,218 INFO L231 Difference]: Finished difference. Result has 497 places, 628 transitions, 10156 flow [2024-06-14 13:58:21,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9950, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10156, PETRI_PLACES=497, PETRI_TRANSITIONS=628} [2024-06-14 13:58:21,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-14 13:58:21,218 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 628 transitions, 10156 flow [2024-06-14 13:58:21,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:21,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:21,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:21,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 13:58:21,219 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:21,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash 711314089, now seen corresponding path program 3 times [2024-06-14 13:58:21,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:21,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355095669] [2024-06-14 13:58:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:21,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:21,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:21,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:21,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355095669] [2024-06-14 13:58:21,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355095669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:21,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:21,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:21,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186520792] [2024-06-14 13:58:21,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:21,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:21,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:21,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:21,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:21,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:21,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 628 transitions, 10156 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:21,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:21,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:21,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:22,606 INFO L124 PetriNetUnfolderBase]: 2750/4626 cut-off events. [2024-06-14 13:58:22,606 INFO L125 PetriNetUnfolderBase]: For 677835/677835 co-relation queries the response was YES. [2024-06-14 13:58:22,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40166 conditions, 4626 events. 2750/4626 cut-off events. For 677835/677835 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 30027 event pairs, 383 based on Foata normal form. 6/4631 useless extension candidates. Maximal degree in co-relation 39956. Up to 3889 conditions per place. [2024-06-14 13:58:22,682 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 591 selfloop transitions, 62 changer transitions 0/659 dead transitions. [2024-06-14 13:58:22,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 659 transitions, 11830 flow [2024-06-14 13:58:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:58:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:58:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:58:22,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 13:58:22,684 INFO L175 Difference]: Start difference. First operand has 497 places, 628 transitions, 10156 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:58:22,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 659 transitions, 11830 flow [2024-06-14 13:58:27,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 659 transitions, 11626 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:58:27,422 INFO L231 Difference]: Finished difference. Result has 502 places, 630 transitions, 10130 flow [2024-06-14 13:58:27,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9952, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10130, PETRI_PLACES=502, PETRI_TRANSITIONS=630} [2024-06-14 13:58:27,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-14 13:58:27,422 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 630 transitions, 10130 flow [2024-06-14 13:58:27,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:27,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:27,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:27,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 13:58:27,422 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:27,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:27,423 INFO L85 PathProgramCache]: Analyzing trace with hash 660544009, now seen corresponding path program 4 times [2024-06-14 13:58:27,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:27,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692895442] [2024-06-14 13:58:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:27,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:27,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:27,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:27,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692895442] [2024-06-14 13:58:27,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692895442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:27,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:27,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:27,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313183449] [2024-06-14 13:58:27,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:27,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:27,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:27,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:27,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 630 transitions, 10130 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:27,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:27,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:27,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:28,775 INFO L124 PetriNetUnfolderBase]: 2803/4711 cut-off events. [2024-06-14 13:58:28,775 INFO L125 PetriNetUnfolderBase]: For 729670/729670 co-relation queries the response was YES. [2024-06-14 13:58:28,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41371 conditions, 4711 events. 2803/4711 cut-off events. For 729670/729670 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 30697 event pairs, 453 based on Foata normal form. 6/4714 useless extension candidates. Maximal degree in co-relation 41159. Up to 3582 conditions per place. [2024-06-14 13:58:28,853 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 558 selfloop transitions, 100 changer transitions 0/664 dead transitions. [2024-06-14 13:58:28,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 664 transitions, 12096 flow [2024-06-14 13:58:28,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:58:28,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 13:58:28,854 INFO L175 Difference]: Start difference. First operand has 502 places, 630 transitions, 10130 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:58:28,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 664 transitions, 12096 flow [2024-06-14 13:58:33,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 664 transitions, 11947 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:58:33,159 INFO L231 Difference]: Finished difference. Result has 502 places, 632 transitions, 10233 flow [2024-06-14 13:58:33,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9981, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10233, PETRI_PLACES=502, PETRI_TRANSITIONS=632} [2024-06-14 13:58:33,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-14 13:58:33,160 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 632 transitions, 10233 flow [2024-06-14 13:58:33,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:33,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:33,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:33,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 13:58:33,160 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:33,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:33,160 INFO L85 PathProgramCache]: Analyzing trace with hash 72303273, now seen corresponding path program 5 times [2024-06-14 13:58:33,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:33,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820487606] [2024-06-14 13:58:33,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:33,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:33,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:33,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:33,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820487606] [2024-06-14 13:58:33,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820487606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:33,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:33,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:33,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561748629] [2024-06-14 13:58:33,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:33,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:33,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:33,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:33,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:33,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:33,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 632 transitions, 10233 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:33,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:33,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:33,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:34,615 INFO L124 PetriNetUnfolderBase]: 2831/4751 cut-off events. [2024-06-14 13:58:34,615 INFO L125 PetriNetUnfolderBase]: For 754103/754103 co-relation queries the response was YES. [2024-06-14 13:58:34,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41804 conditions, 4751 events. 2831/4751 cut-off events. For 754103/754103 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 30958 event pairs, 498 based on Foata normal form. 8/4758 useless extension candidates. Maximal degree in co-relation 41593. Up to 3807 conditions per place. [2024-06-14 13:58:34,690 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 549 selfloop transitions, 107 changer transitions 0/662 dead transitions. [2024-06-14 13:58:34,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 662 transitions, 11943 flow [2024-06-14 13:58:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:34,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 13:58:34,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 13:58:34,691 INFO L175 Difference]: Start difference. First operand has 502 places, 632 transitions, 10233 flow. Second operand 7 states and 170 transitions. [2024-06-14 13:58:34,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 662 transitions, 11943 flow [2024-06-14 13:58:39,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 662 transitions, 11718 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:58:39,454 INFO L231 Difference]: Finished difference. Result has 505 places, 633 transitions, 10257 flow [2024-06-14 13:58:39,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10012, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10257, PETRI_PLACES=505, PETRI_TRANSITIONS=633} [2024-06-14 13:58:39,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-14 13:58:39,455 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 633 transitions, 10257 flow [2024-06-14 13:58:39,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:39,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:39,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:39,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 13:58:39,456 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:39,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:39,456 INFO L85 PathProgramCache]: Analyzing trace with hash 811217959, now seen corresponding path program 6 times [2024-06-14 13:58:39,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:39,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075338707] [2024-06-14 13:58:39,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:39,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:39,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075338707] [2024-06-14 13:58:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075338707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:39,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:39,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248665582] [2024-06-14 13:58:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:39,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:39,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:39,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 633 transitions, 10257 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:39,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:39,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:39,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:40,917 INFO L124 PetriNetUnfolderBase]: 2859/4797 cut-off events. [2024-06-14 13:58:40,918 INFO L125 PetriNetUnfolderBase]: For 766670/766670 co-relation queries the response was YES. [2024-06-14 13:58:40,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42091 conditions, 4797 events. 2859/4797 cut-off events. For 766670/766670 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 31263 event pairs, 579 based on Foata normal form. 8/4802 useless extension candidates. Maximal degree in co-relation 41879. Up to 4129 conditions per place. [2024-06-14 13:58:40,997 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 551 selfloop transitions, 98 changer transitions 0/655 dead transitions. [2024-06-14 13:58:40,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 655 transitions, 11665 flow [2024-06-14 13:58:40,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:40,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:58:40,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:58:40,998 INFO L175 Difference]: Start difference. First operand has 505 places, 633 transitions, 10257 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:58:40,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 655 transitions, 11665 flow [2024-06-14 13:58:45,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 655 transitions, 11430 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:45,426 INFO L231 Difference]: Finished difference. Result has 506 places, 634 transitions, 10255 flow [2024-06-14 13:58:45,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10026, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10255, PETRI_PLACES=506, PETRI_TRANSITIONS=634} [2024-06-14 13:58:45,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-14 13:58:45,427 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 634 transitions, 10255 flow [2024-06-14 13:58:45,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:45,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:45,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:45,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 13:58:45,427 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:45,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:45,427 INFO L85 PathProgramCache]: Analyzing trace with hash 660664165, now seen corresponding path program 4 times [2024-06-14 13:58:45,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:45,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587587798] [2024-06-14 13:58:45,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:45,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:45,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:45,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587587798] [2024-06-14 13:58:45,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587587798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:45,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:45,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:45,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579636239] [2024-06-14 13:58:45,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:45,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:45,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:45,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:45,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:45,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:45,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 634 transitions, 10255 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:45,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:45,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:45,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:46,987 INFO L124 PetriNetUnfolderBase]: 2846/4765 cut-off events. [2024-06-14 13:58:46,987 INFO L125 PetriNetUnfolderBase]: For 712648/712648 co-relation queries the response was YES. [2024-06-14 13:58:47,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41105 conditions, 4765 events. 2846/4765 cut-off events. For 712648/712648 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 31001 event pairs, 545 based on Foata normal form. 6/4761 useless extension candidates. Maximal degree in co-relation 40893. Up to 4074 conditions per place. [2024-06-14 13:58:47,057 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 572 selfloop transitions, 83 changer transitions 0/661 dead transitions. [2024-06-14 13:58:47,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 661 transitions, 11913 flow [2024-06-14 13:58:47,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:47,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:58:47,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 13:58:47,058 INFO L175 Difference]: Start difference. First operand has 506 places, 634 transitions, 10255 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:58:47,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 661 transitions, 11913 flow [2024-06-14 13:58:50,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 661 transitions, 11694 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:50,857 INFO L231 Difference]: Finished difference. Result has 508 places, 634 transitions, 10208 flow [2024-06-14 13:58:50,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10038, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10208, PETRI_PLACES=508, PETRI_TRANSITIONS=634} [2024-06-14 13:58:50,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-14 13:58:50,858 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 634 transitions, 10208 flow [2024-06-14 13:58:50,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:50,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:50,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:50,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 13:58:50,858 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:50,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:50,859 INFO L85 PathProgramCache]: Analyzing trace with hash 660663979, now seen corresponding path program 7 times [2024-06-14 13:58:50,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:50,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150495749] [2024-06-14 13:58:50,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:50,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:51,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:51,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150495749] [2024-06-14 13:58:51,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150495749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:51,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:51,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:51,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146192802] [2024-06-14 13:58:51,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:51,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:51,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:51,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:51,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 634 transitions, 10208 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:51,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:51,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:51,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:52,309 INFO L124 PetriNetUnfolderBase]: 2833/4748 cut-off events. [2024-06-14 13:58:52,309 INFO L125 PetriNetUnfolderBase]: For 669965/669965 co-relation queries the response was YES. [2024-06-14 13:58:52,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40161 conditions, 4748 events. 2833/4748 cut-off events. For 669965/669965 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 30933 event pairs, 548 based on Foata normal form. 6/4744 useless extension candidates. Maximal degree in co-relation 39949. Up to 4174 conditions per place. [2024-06-14 13:58:52,390 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 602 selfloop transitions, 48 changer transitions 0/656 dead transitions. [2024-06-14 13:58:52,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 656 transitions, 11576 flow [2024-06-14 13:58:52,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:58:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:58:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 13:58:52,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 13:58:52,390 INFO L175 Difference]: Start difference. First operand has 508 places, 634 transitions, 10208 flow. Second operand 7 states and 156 transitions. [2024-06-14 13:58:52,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 656 transitions, 11576 flow [2024-06-14 13:58:56,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 656 transitions, 11410 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:58:56,290 INFO L231 Difference]: Finished difference. Result has 508 places, 634 transitions, 10142 flow [2024-06-14 13:58:56,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10042, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10142, PETRI_PLACES=508, PETRI_TRANSITIONS=634} [2024-06-14 13:58:56,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-14 13:58:56,291 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 634 transitions, 10142 flow [2024-06-14 13:58:56,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:56,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:56,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:56,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 13:58:56,291 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:56,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:56,291 INFO L85 PathProgramCache]: Analyzing trace with hash 196344069, now seen corresponding path program 5 times [2024-06-14 13:58:56,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:56,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010880203] [2024-06-14 13:58:56,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:56,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:56,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:56,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:56,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010880203] [2024-06-14 13:58:56,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010880203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:56,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:56,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:56,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569378973] [2024-06-14 13:58:56,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:56,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:56,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:56,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:56,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:56,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 634 transitions, 10142 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:56,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:56,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:56,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:57,658 INFO L124 PetriNetUnfolderBase]: 2861/4807 cut-off events. [2024-06-14 13:58:57,658 INFO L125 PetriNetUnfolderBase]: For 696789/696789 co-relation queries the response was YES. [2024-06-14 13:58:57,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40519 conditions, 4807 events. 2861/4807 cut-off events. For 696789/696789 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 31443 event pairs, 567 based on Foata normal form. 8/4814 useless extension candidates. Maximal degree in co-relation 40306. Up to 4211 conditions per place. [2024-06-14 13:58:57,736 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 573 selfloop transitions, 75 changer transitions 0/654 dead transitions. [2024-06-14 13:58:57,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 654 transitions, 11553 flow [2024-06-14 13:58:57,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:58:57,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:58:57,737 INFO L175 Difference]: Start difference. First operand has 508 places, 634 transitions, 10142 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:58:57,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 654 transitions, 11553 flow [2024-06-14 13:59:01,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 654 transitions, 11454 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:01,916 INFO L231 Difference]: Finished difference. Result has 510 places, 635 transitions, 10241 flow [2024-06-14 13:59:01,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10043, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10241, PETRI_PLACES=510, PETRI_TRANSITIONS=635} [2024-06-14 13:59:01,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-14 13:59:01,917 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 635 transitions, 10241 flow [2024-06-14 13:59:01,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:01,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:01,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:01,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 13:59:01,918 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:01,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash 196165323, now seen corresponding path program 8 times [2024-06-14 13:59:01,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:01,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701265944] [2024-06-14 13:59:01,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:01,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:02,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701265944] [2024-06-14 13:59:02,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701265944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:02,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:02,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:02,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049084450] [2024-06-14 13:59:02,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:02,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:02,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:02,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:02,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 635 transitions, 10241 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:02,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:02,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:02,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:03,355 INFO L124 PetriNetUnfolderBase]: 2889/4847 cut-off events. [2024-06-14 13:59:03,356 INFO L125 PetriNetUnfolderBase]: For 708394/708394 co-relation queries the response was YES. [2024-06-14 13:59:03,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41021 conditions, 4847 events. 2889/4847 cut-off events. For 708394/708394 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 31710 event pairs, 573 based on Foata normal form. 8/4852 useless extension candidates. Maximal degree in co-relation 40807. Up to 4253 conditions per place. [2024-06-14 13:59:03,439 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 585 selfloop transitions, 63 changer transitions 0/654 dead transitions. [2024-06-14 13:59:03,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 654 transitions, 11637 flow [2024-06-14 13:59:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:59:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:59:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:59:03,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 13:59:03,440 INFO L175 Difference]: Start difference. First operand has 510 places, 635 transitions, 10241 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:59:03,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 654 transitions, 11637 flow [2024-06-14 13:59:07,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 654 transitions, 11482 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:07,321 INFO L231 Difference]: Finished difference. Result has 511 places, 636 transitions, 10248 flow [2024-06-14 13:59:07,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10086, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10248, PETRI_PLACES=511, PETRI_TRANSITIONS=636} [2024-06-14 13:59:07,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-14 13:59:07,321 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 636 transitions, 10248 flow [2024-06-14 13:59:07,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:07,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:07,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:07,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 13:59:07,322 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:07,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash 926361445, now seen corresponding path program 6 times [2024-06-14 13:59:07,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:07,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721379005] [2024-06-14 13:59:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:07,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:07,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:07,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:07,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721379005] [2024-06-14 13:59:07,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721379005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:07,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:07,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:07,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250490316] [2024-06-14 13:59:07,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:07,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:07,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:07,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:07,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:07,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:07,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 636 transitions, 10248 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:07,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:07,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:07,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:08,733 INFO L124 PetriNetUnfolderBase]: 2917/4893 cut-off events. [2024-06-14 13:59:08,733 INFO L125 PetriNetUnfolderBase]: For 707009/707009 co-relation queries the response was YES. [2024-06-14 13:59:08,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41393 conditions, 4893 events. 2917/4893 cut-off events. For 707009/707009 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 32070 event pairs, 567 based on Foata normal form. 6/4896 useless extension candidates. Maximal degree in co-relation 41178. Up to 4269 conditions per place. [2024-06-14 13:59:08,814 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 580 selfloop transitions, 75 changer transitions 0/661 dead transitions. [2024-06-14 13:59:08,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 661 transitions, 11718 flow [2024-06-14 13:59:08,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:59:08,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:59:08,815 INFO L175 Difference]: Start difference. First operand has 511 places, 636 transitions, 10248 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:59:08,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 661 transitions, 11718 flow [2024-06-14 13:59:12,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 661 transitions, 11583 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:12,674 INFO L231 Difference]: Finished difference. Result has 515 places, 639 transitions, 10343 flow [2024-06-14 13:59:12,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10113, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10343, PETRI_PLACES=515, PETRI_TRANSITIONS=639} [2024-06-14 13:59:12,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-14 13:59:12,674 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 639 transitions, 10343 flow [2024-06-14 13:59:12,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:12,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:12,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:12,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 13:59:12,675 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:12,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:12,675 INFO L85 PathProgramCache]: Analyzing trace with hash 668073289, now seen corresponding path program 9 times [2024-06-14 13:59:12,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:12,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767154353] [2024-06-14 13:59:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:12,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:12,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:12,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767154353] [2024-06-14 13:59:12,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767154353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:12,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:12,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:12,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047492366] [2024-06-14 13:59:12,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:12,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:12,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:12,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:12,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:13,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:13,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 639 transitions, 10343 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:13,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:13,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:13,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:14,149 INFO L124 PetriNetUnfolderBase]: 2937/4929 cut-off events. [2024-06-14 13:59:14,149 INFO L125 PetriNetUnfolderBase]: For 718843/718843 co-relation queries the response was YES. [2024-06-14 13:59:14,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41770 conditions, 4929 events. 2937/4929 cut-off events. For 718843/718843 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 32325 event pairs, 575 based on Foata normal form. 6/4930 useless extension candidates. Maximal degree in co-relation 41553. Up to 4299 conditions per place. [2024-06-14 13:59:14,235 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 590 selfloop transitions, 66 changer transitions 0/662 dead transitions. [2024-06-14 13:59:14,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 662 transitions, 11777 flow [2024-06-14 13:59:14,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:59:14,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:59:14,236 INFO L175 Difference]: Start difference. First operand has 515 places, 639 transitions, 10343 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:59:14,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 662 transitions, 11777 flow [2024-06-14 13:59:18,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 662 transitions, 11615 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:18,135 INFO L231 Difference]: Finished difference. Result has 518 places, 640 transitions, 10339 flow [2024-06-14 13:59:18,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10181, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10339, PETRI_PLACES=518, PETRI_TRANSITIONS=640} [2024-06-14 13:59:18,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-14 13:59:18,135 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 640 transitions, 10339 flow [2024-06-14 13:59:18,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:18,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:18,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:18,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 13:59:18,136 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:18,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:18,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1902287775, now seen corresponding path program 7 times [2024-06-14 13:59:18,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:18,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236559346] [2024-06-14 13:59:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:18,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:18,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:18,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:18,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236559346] [2024-06-14 13:59:18,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236559346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:18,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:18,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:18,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247410481] [2024-06-14 13:59:18,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:18,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:18,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:18,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:18,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 640 transitions, 10339 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:18,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:18,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:18,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:19,663 INFO L124 PetriNetUnfolderBase]: 2965/4969 cut-off events. [2024-06-14 13:59:19,663 INFO L125 PetriNetUnfolderBase]: For 745351/745351 co-relation queries the response was YES. [2024-06-14 13:59:19,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42178 conditions, 4969 events. 2965/4969 cut-off events. For 745351/745351 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 32605 event pairs, 581 based on Foata normal form. 8/4976 useless extension candidates. Maximal degree in co-relation 41960. Up to 4331 conditions per place. [2024-06-14 13:59:19,747 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 573 selfloop transitions, 80 changer transitions 0/659 dead transitions. [2024-06-14 13:59:19,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 659 transitions, 11762 flow [2024-06-14 13:59:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:59:19,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:59:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 13:59:19,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 13:59:19,748 INFO L175 Difference]: Start difference. First operand has 518 places, 640 transitions, 10339 flow. Second operand 7 states and 160 transitions. [2024-06-14 13:59:19,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 659 transitions, 11762 flow [2024-06-14 13:59:23,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 659 transitions, 11633 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:23,807 INFO L231 Difference]: Finished difference. Result has 520 places, 641 transitions, 10431 flow [2024-06-14 13:59:23,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10210, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10431, PETRI_PLACES=520, PETRI_TRANSITIONS=641} [2024-06-14 13:59:23,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-14 13:59:23,807 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 641 transitions, 10431 flow [2024-06-14 13:59:23,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:23,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:23,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:23,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 13:59:23,808 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:23,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:23,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1677243585, now seen corresponding path program 8 times [2024-06-14 13:59:23,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:23,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557602952] [2024-06-14 13:59:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:23,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:24,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:24,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557602952] [2024-06-14 13:59:24,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557602952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:24,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:24,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:24,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328575081] [2024-06-14 13:59:24,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:24,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:24,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:24,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:24,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:24,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 641 transitions, 10431 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:24,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:24,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:24,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:25,349 INFO L124 PetriNetUnfolderBase]: 3013/5057 cut-off events. [2024-06-14 13:59:25,349 INFO L125 PetriNetUnfolderBase]: For 791360/791360 co-relation queries the response was YES. [2024-06-14 13:59:25,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43544 conditions, 5057 events. 3013/5057 cut-off events. For 791360/791360 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 33337 event pairs, 539 based on Foata normal form. 8/5064 useless extension candidates. Maximal degree in co-relation 43325. Up to 4241 conditions per place. [2024-06-14 13:59:25,429 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 566 selfloop transitions, 95 changer transitions 0/667 dead transitions. [2024-06-14 13:59:25,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 667 transitions, 12199 flow [2024-06-14 13:59:25,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:25,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:59:25,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 13:59:25,430 INFO L175 Difference]: Start difference. First operand has 520 places, 641 transitions, 10431 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:59:25,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 667 transitions, 12199 flow [2024-06-14 13:59:29,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 667 transitions, 12033 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:29,332 INFO L231 Difference]: Finished difference. Result has 524 places, 643 transitions, 10581 flow [2024-06-14 13:59:29,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10269, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10581, PETRI_PLACES=524, PETRI_TRANSITIONS=643} [2024-06-14 13:59:29,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-14 13:59:29,333 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 643 transitions, 10581 flow [2024-06-14 13:59:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:29,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:29,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:29,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 13:59:29,333 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:29,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:29,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1991179965, now seen corresponding path program 9 times [2024-06-14 13:59:29,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:29,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135949315] [2024-06-14 13:59:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:29,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:29,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:29,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135949315] [2024-06-14 13:59:29,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135949315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:29,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:29,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:29,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651365719] [2024-06-14 13:59:29,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:29,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:29,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:29,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:29,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:29,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:29,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 643 transitions, 10581 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:29,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:29,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:29,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:31,083 INFO L124 PetriNetUnfolderBase]: 3033/5089 cut-off events. [2024-06-14 13:59:31,083 INFO L125 PetriNetUnfolderBase]: For 778922/778922 co-relation queries the response was YES. [2024-06-14 13:59:31,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43988 conditions, 5089 events. 3033/5089 cut-off events. For 778922/778922 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33499 event pairs, 378 based on Foata normal form. 6/5094 useless extension candidates. Maximal degree in co-relation 43767. Up to 3862 conditions per place. [2024-06-14 13:59:31,163 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 559 selfloop transitions, 113 changer transitions 0/678 dead transitions. [2024-06-14 13:59:31,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 678 transitions, 12618 flow [2024-06-14 13:59:31,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:31,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 13:59:31,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-14 13:59:31,164 INFO L175 Difference]: Start difference. First operand has 524 places, 643 transitions, 10581 flow. Second operand 8 states and 193 transitions. [2024-06-14 13:59:31,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 678 transitions, 12618 flow [2024-06-14 13:59:34,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 678 transitions, 12403 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:34,943 INFO L231 Difference]: Finished difference. Result has 526 places, 644 transitions, 10635 flow [2024-06-14 13:59:34,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10366, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10635, PETRI_PLACES=526, PETRI_TRANSITIONS=644} [2024-06-14 13:59:34,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-14 13:59:34,944 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 644 transitions, 10635 flow [2024-06-14 13:59:34,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:34,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:34,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:34,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 13:59:34,944 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:34,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:34,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1902614205, now seen corresponding path program 10 times [2024-06-14 13:59:34,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:34,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970046554] [2024-06-14 13:59:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:34,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:35,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:35,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970046554] [2024-06-14 13:59:35,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970046554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:35,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:35,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075652461] [2024-06-14 13:59:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:35,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:35,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:35,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:35,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 644 transitions, 10635 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:35,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:35,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:35,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:36,590 INFO L124 PetriNetUnfolderBase]: 3020/5053 cut-off events. [2024-06-14 13:59:36,591 INFO L125 PetriNetUnfolderBase]: For 743122/743122 co-relation queries the response was YES. [2024-06-14 13:59:36,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43243 conditions, 5053 events. 3020/5053 cut-off events. For 743122/743122 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33209 event pairs, 573 based on Foata normal form. 6/5047 useless extension candidates. Maximal degree in co-relation 43021. Up to 4248 conditions per place. [2024-06-14 13:59:36,668 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 574 selfloop transitions, 89 changer transitions 0/669 dead transitions. [2024-06-14 13:59:36,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 669 transitions, 12319 flow [2024-06-14 13:59:36,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:59:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:59:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:59:36,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:59:36,669 INFO L175 Difference]: Start difference. First operand has 526 places, 644 transitions, 10635 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:59:36,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 669 transitions, 12319 flow [2024-06-14 13:59:40,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 669 transitions, 12085 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:59:40,929 INFO L231 Difference]: Finished difference. Result has 526 places, 644 transitions, 10591 flow [2024-06-14 13:59:40,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10405, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10591, PETRI_PLACES=526, PETRI_TRANSITIONS=644} [2024-06-14 13:59:40,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-14 13:59:40,929 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 644 transitions, 10591 flow [2024-06-14 13:59:40,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:40,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:40,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:40,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 13:59:40,931 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:40,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:40,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1902614391, now seen corresponding path program 10 times [2024-06-14 13:59:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:40,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621045856] [2024-06-14 13:59:40,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:40,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:40,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:41,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:41,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621045856] [2024-06-14 13:59:41,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621045856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:41,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:41,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:41,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593118114] [2024-06-14 13:59:41,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:41,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:41,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:41,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:41,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:41,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 644 transitions, 10591 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:41,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:41,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:41,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:42,596 INFO L124 PetriNetUnfolderBase]: 3007/5047 cut-off events. [2024-06-14 13:59:42,596 INFO L125 PetriNetUnfolderBase]: For 685893/685893 co-relation queries the response was YES. [2024-06-14 13:59:42,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42071 conditions, 5047 events. 3007/5047 cut-off events. For 685893/685893 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33366 event pairs, 493 based on Foata normal form. 6/5048 useless extension candidates. Maximal degree in co-relation 41850. Up to 4018 conditions per place. [2024-06-14 13:59:42,673 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 565 selfloop transitions, 104 changer transitions 0/675 dead transitions. [2024-06-14 13:59:42,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 675 transitions, 12301 flow [2024-06-14 13:59:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:59:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:59:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 13:59:42,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 13:59:42,674 INFO L175 Difference]: Start difference. First operand has 526 places, 644 transitions, 10591 flow. Second operand 7 states and 172 transitions. [2024-06-14 13:59:42,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 675 transitions, 12301 flow [2024-06-14 13:59:46,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 675 transitions, 12088 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:46,450 INFO L231 Difference]: Finished difference. Result has 527 places, 644 transitions, 10596 flow [2024-06-14 13:59:46,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10380, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10596, PETRI_PLACES=527, PETRI_TRANSITIONS=644} [2024-06-14 13:59:46,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-14 13:59:46,451 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 644 transitions, 10596 flow [2024-06-14 13:59:46,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:46,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:46,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:46,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 13:59:46,451 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:46,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:46,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1990942815, now seen corresponding path program 11 times [2024-06-14 13:59:46,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:46,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135450156] [2024-06-14 13:59:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:46,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:46,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:46,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135450156] [2024-06-14 13:59:46,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135450156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:46,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:46,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:46,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664157238] [2024-06-14 13:59:46,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:46,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:46,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:46,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:46,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:46,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:46,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 644 transitions, 10596 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:46,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:46,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:46,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:47,937 INFO L124 PetriNetUnfolderBase]: 2994/5032 cut-off events. [2024-06-14 13:59:47,937 INFO L125 PetriNetUnfolderBase]: For 638827/638827 co-relation queries the response was YES. [2024-06-14 13:59:48,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40959 conditions, 5032 events. 2994/5032 cut-off events. For 638827/638827 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33188 event pairs, 368 based on Foata normal form. 6/5037 useless extension candidates. Maximal degree in co-relation 40739. Up to 3831 conditions per place. [2024-06-14 13:59:48,022 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 555 selfloop transitions, 112 changer transitions 0/673 dead transitions. [2024-06-14 13:59:48,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 673 transitions, 12310 flow [2024-06-14 13:59:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:59:48,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 13:59:48,023 INFO L175 Difference]: Start difference. First operand has 527 places, 644 transitions, 10596 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:59:48,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 673 transitions, 12310 flow [2024-06-14 13:59:52,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 673 transitions, 12111 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:59:52,012 INFO L231 Difference]: Finished difference. Result has 528 places, 644 transitions, 10631 flow [2024-06-14 13:59:52,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10401, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10631, PETRI_PLACES=528, PETRI_TRANSITIONS=644} [2024-06-14 13:59:52,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-14 13:59:52,012 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 644 transitions, 10631 flow [2024-06-14 13:59:52,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:52,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:52,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:52,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 13:59:52,013 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:52,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:52,013 INFO L85 PathProgramCache]: Analyzing trace with hash -2037421299, now seen corresponding path program 11 times [2024-06-14 13:59:52,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:52,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607146259] [2024-06-14 13:59:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:52,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:52,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:52,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607146259] [2024-06-14 13:59:52,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607146259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:52,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:52,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:52,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359102567] [2024-06-14 13:59:52,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:52,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:52,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:52,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:52,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 644 transitions, 10631 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:52,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:52,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:52,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:53,549 INFO L124 PetriNetUnfolderBase]: 2981/5013 cut-off events. [2024-06-14 13:59:53,549 INFO L125 PetriNetUnfolderBase]: For 586699/586699 co-relation queries the response was YES. [2024-06-14 13:59:53,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40113 conditions, 5013 events. 2981/5013 cut-off events. For 586699/586699 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 33081 event pairs, 353 based on Foata normal form. 6/5018 useless extension candidates. Maximal degree in co-relation 39894. Up to 3820 conditions per place. [2024-06-14 13:59:53,635 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 563 selfloop transitions, 111 changer transitions 0/680 dead transitions. [2024-06-14 13:59:53,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 680 transitions, 12361 flow [2024-06-14 13:59:53,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:59:53,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-14 13:59:53,636 INFO L175 Difference]: Start difference. First operand has 528 places, 644 transitions, 10631 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:59:53,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 680 transitions, 12361 flow [2024-06-14 13:59:57,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 680 transitions, 12091 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 13:59:57,891 INFO L231 Difference]: Finished difference. Result has 528 places, 644 transitions, 10591 flow [2024-06-14 13:59:57,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10363, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10591, PETRI_PLACES=528, PETRI_TRANSITIONS=644} [2024-06-14 13:59:57,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-14 13:59:57,892 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 644 transitions, 10591 flow [2024-06-14 13:59:57,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:57,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:57,892 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, 1, 1] [2024-06-14 13:59:57,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 13:59:57,892 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:57,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:57,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1674386625, now seen corresponding path program 12 times [2024-06-14 13:59:57,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:57,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511841886] [2024-06-14 13:59:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:57,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:58,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:58,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511841886] [2024-06-14 13:59:58,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511841886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:58,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:58,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:58,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386234067] [2024-06-14 13:59:58,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:58,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:58,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:58,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:58,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:58,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:58,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 644 transitions, 10591 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:58,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:58,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:58,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:59,346 INFO L124 PetriNetUnfolderBase]: 2963/4985 cut-off events. [2024-06-14 13:59:59,346 INFO L125 PetriNetUnfolderBase]: For 540890/540890 co-relation queries the response was YES. [2024-06-14 13:59:59,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38689 conditions, 4985 events. 2963/4985 cut-off events. For 540890/540890 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 32907 event pairs, 581 based on Foata normal form. 8/4992 useless extension candidates. Maximal degree in co-relation 38470. Up to 4381 conditions per place. [2024-06-14 13:59:59,430 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 582 selfloop transitions, 75 changer transitions 0/663 dead transitions. [2024-06-14 13:59:59,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 663 transitions, 11985 flow [2024-06-14 13:59:59,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:59,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:59:59,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:59:59,431 INFO L175 Difference]: Start difference. First operand has 528 places, 644 transitions, 10591 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:59:59,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 663 transitions, 11985 flow [2024-06-14 14:00:03,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 663 transitions, 11781 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:03,047 INFO L231 Difference]: Finished difference. Result has 529 places, 644 transitions, 10548 flow [2024-06-14 14:00:03,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10387, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10548, PETRI_PLACES=529, PETRI_TRANSITIONS=644} [2024-06-14 14:00:03,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 487 predicate places. [2024-06-14 14:00:03,048 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 644 transitions, 10548 flow [2024-06-14 14:00:03,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:03,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:03,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:03,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 14:00:03,048 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:03,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:03,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1902466521, now seen corresponding path program 12 times [2024-06-14 14:00:03,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:03,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566907019] [2024-06-14 14:00:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:03,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:03,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:03,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566907019] [2024-06-14 14:00:03,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566907019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:03,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:03,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:03,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957890476] [2024-06-14 14:00:03,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:03,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:03,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:03,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:03,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:03,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:03,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 644 transitions, 10548 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:03,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:03,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:03,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:04,579 INFO L124 PetriNetUnfolderBase]: 2945/4961 cut-off events. [2024-06-14 14:00:04,579 INFO L125 PetriNetUnfolderBase]: For 479630/479630 co-relation queries the response was YES. [2024-06-14 14:00:04,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37264 conditions, 4961 events. 2945/4961 cut-off events. For 479630/479630 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 32822 event pairs, 506 based on Foata normal form. 8/4968 useless extension candidates. Maximal degree in co-relation 37045. Up to 4093 conditions per place. [2024-06-14 14:00:04,664 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 566 selfloop transitions, 95 changer transitions 0/667 dead transitions. [2024-06-14 14:00:04,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 667 transitions, 11962 flow [2024-06-14 14:00:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:00:04,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:00:04,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:00:04,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-14 14:00:04,665 INFO L175 Difference]: Start difference. First operand has 529 places, 644 transitions, 10548 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:00:04,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 667 transitions, 11962 flow [2024-06-14 14:00:07,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 667 transitions, 11772 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:07,417 INFO L231 Difference]: Finished difference. Result has 528 places, 644 transitions, 10580 flow [2024-06-14 14:00:07,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10358, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10580, PETRI_PLACES=528, PETRI_TRANSITIONS=644} [2024-06-14 14:00:07,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-14 14:00:07,418 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 644 transitions, 10580 flow [2024-06-14 14:00:07,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:07,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:07,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:07,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-14 14:00:07,418 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:07,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:07,418 INFO L85 PathProgramCache]: Analyzing trace with hash -353249839, now seen corresponding path program 13 times [2024-06-14 14:00:07,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:07,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363277419] [2024-06-14 14:00:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:07,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:07,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:07,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363277419] [2024-06-14 14:00:07,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363277419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:07,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:07,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:07,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223399195] [2024-06-14 14:00:07,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:07,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:07,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:07,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:07,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:07,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:07,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 644 transitions, 10580 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:07,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:07,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:07,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:08,834 INFO L124 PetriNetUnfolderBase]: 3019/5075 cut-off events. [2024-06-14 14:00:08,834 INFO L125 PetriNetUnfolderBase]: For 541210/541210 co-relation queries the response was YES. [2024-06-14 14:00:08,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39146 conditions, 5075 events. 3019/5075 cut-off events. For 541210/541210 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 33613 event pairs, 589 based on Foata normal form. 8/5082 useless extension candidates. Maximal degree in co-relation 38926. Up to 4130 conditions per place. [2024-06-14 14:00:08,920 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 540 selfloop transitions, 133 changer transitions 0/679 dead transitions. [2024-06-14 14:00:08,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 679 transitions, 12364 flow [2024-06-14 14:00:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:08,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 14:00:08,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 14:00:08,921 INFO L175 Difference]: Start difference. First operand has 528 places, 644 transitions, 10580 flow. Second operand 8 states and 187 transitions. [2024-06-14 14:00:08,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 679 transitions, 12364 flow [2024-06-14 14:00:12,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 679 transitions, 12083 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:00:12,133 INFO L231 Difference]: Finished difference. Result has 528 places, 646 transitions, 10621 flow [2024-06-14 14:00:12,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10305, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10621, PETRI_PLACES=528, PETRI_TRANSITIONS=646} [2024-06-14 14:00:12,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-14 14:00:12,133 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 646 transitions, 10621 flow [2024-06-14 14:00:12,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:12,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:12,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:12,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-14 14:00:12,133 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:12,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:12,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1510500465, now seen corresponding path program 14 times [2024-06-14 14:00:12,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:12,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407084162] [2024-06-14 14:00:12,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:12,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:12,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:12,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:12,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:12,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407084162] [2024-06-14 14:00:12,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407084162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:12,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:12,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:12,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317012880] [2024-06-14 14:00:12,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:12,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:12,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:12,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:12,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:12,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:12,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 646 transitions, 10621 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:12,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:12,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:12,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:13,592 INFO L124 PetriNetUnfolderBase]: 3047/5119 cut-off events. [2024-06-14 14:00:13,592 INFO L125 PetriNetUnfolderBase]: For 525291/525291 co-relation queries the response was YES. [2024-06-14 14:00:13,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39334 conditions, 5119 events. 3047/5119 cut-off events. For 525291/525291 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 33936 event pairs, 609 based on Foata normal form. 8/5126 useless extension candidates. Maximal degree in co-relation 39115. Up to 4358 conditions per place. [2024-06-14 14:00:13,677 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 533 selfloop transitions, 133 changer transitions 0/672 dead transitions. [2024-06-14 14:00:13,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 672 transitions, 12073 flow [2024-06-14 14:00:13,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:13,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:13,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 14:00:13,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:00:13,678 INFO L175 Difference]: Start difference. First operand has 528 places, 646 transitions, 10621 flow. Second operand 8 states and 180 transitions. [2024-06-14 14:00:13,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 672 transitions, 12073 flow [2024-06-14 14:00:16,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 672 transitions, 11888 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 14:00:16,896 INFO L231 Difference]: Finished difference. Result has 532 places, 647 transitions, 10733 flow [2024-06-14 14:00:16,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10442, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10733, PETRI_PLACES=532, PETRI_TRANSITIONS=647} [2024-06-14 14:00:16,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-14 14:00:16,897 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 647 transitions, 10733 flow [2024-06-14 14:00:16,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:16,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:16,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:16,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-14 14:00:16,898 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:16,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:16,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1917616067, now seen corresponding path program 15 times [2024-06-14 14:00:16,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:16,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944560550] [2024-06-14 14:00:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:16,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:17,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:17,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944560550] [2024-06-14 14:00:17,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944560550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:17,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:17,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:17,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105485985] [2024-06-14 14:00:17,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:17,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:17,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:17,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:17,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:17,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:17,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 647 transitions, 10733 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:17,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:17,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:17,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:18,439 INFO L124 PetriNetUnfolderBase]: 3121/5233 cut-off events. [2024-06-14 14:00:18,439 INFO L125 PetriNetUnfolderBase]: For 592778/592778 co-relation queries the response was YES. [2024-06-14 14:00:18,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41310 conditions, 5233 events. 3121/5233 cut-off events. For 592778/592778 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 34781 event pairs, 621 based on Foata normal form. 8/5240 useless extension candidates. Maximal degree in co-relation 41089. Up to 4306 conditions per place. [2024-06-14 14:00:18,524 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 549 selfloop transitions, 127 changer transitions 0/682 dead transitions. [2024-06-14 14:00:18,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 682 transitions, 12525 flow [2024-06-14 14:00:18,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 14:00:18,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 14:00:18,525 INFO L175 Difference]: Start difference. First operand has 532 places, 647 transitions, 10733 flow. Second operand 8 states and 187 transitions. [2024-06-14 14:00:18,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 682 transitions, 12525 flow [2024-06-14 14:00:22,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 682 transitions, 12258 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:22,932 INFO L231 Difference]: Finished difference. Result has 534 places, 649 transitions, 10774 flow [2024-06-14 14:00:22,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10466, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10774, PETRI_PLACES=534, PETRI_TRANSITIONS=649} [2024-06-14 14:00:22,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-14 14:00:22,933 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 649 transitions, 10774 flow [2024-06-14 14:00:22,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:22,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:22,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:22,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-14 14:00:22,933 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:22,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:22,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1211290713, now seen corresponding path program 16 times [2024-06-14 14:00:22,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:22,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689852661] [2024-06-14 14:00:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:22,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:23,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:23,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689852661] [2024-06-14 14:00:23,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689852661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:23,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:23,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:23,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283454183] [2024-06-14 14:00:23,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:23,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:23,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:23,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:23,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:23,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:23,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 649 transitions, 10774 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:23,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:23,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:23,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:24,533 INFO L124 PetriNetUnfolderBase]: 3149/5277 cut-off events. [2024-06-14 14:00:24,534 INFO L125 PetriNetUnfolderBase]: For 603515/603515 co-relation queries the response was YES. [2024-06-14 14:00:24,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41759 conditions, 5277 events. 3149/5277 cut-off events. For 603515/603515 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 35108 event pairs, 641 based on Foata normal form. 8/5284 useless extension candidates. Maximal degree in co-relation 41537. Up to 4516 conditions per place. [2024-06-14 14:00:24,615 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 543 selfloop transitions, 126 changer transitions 0/675 dead transitions. [2024-06-14 14:00:24,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 675 transitions, 12234 flow [2024-06-14 14:00:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 14:00:24,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:00:24,616 INFO L175 Difference]: Start difference. First operand has 534 places, 649 transitions, 10774 flow. Second operand 8 states and 180 transitions. [2024-06-14 14:00:24,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 675 transitions, 12234 flow [2024-06-14 14:00:28,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 675 transitions, 12055 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 14:00:28,266 INFO L231 Difference]: Finished difference. Result has 538 places, 650 transitions, 10880 flow [2024-06-14 14:00:28,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10603, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10880, PETRI_PLACES=538, PETRI_TRANSITIONS=650} [2024-06-14 14:00:28,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 496 predicate places. [2024-06-14 14:00:28,266 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 650 transitions, 10880 flow [2024-06-14 14:00:28,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:28,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:28,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:28,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-14 14:00:28,267 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:28,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:28,267 INFO L85 PathProgramCache]: Analyzing trace with hash -57791629, now seen corresponding path program 17 times [2024-06-14 14:00:28,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:28,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696286104] [2024-06-14 14:00:28,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:28,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:28,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696286104] [2024-06-14 14:00:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696286104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:28,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:28,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:28,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381916439] [2024-06-14 14:00:28,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:28,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:28,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:28,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:28,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:28,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:28,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 650 transitions, 10880 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:28,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:28,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:28,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:29,907 INFO L124 PetriNetUnfolderBase]: 3177/5321 cut-off events. [2024-06-14 14:00:29,907 INFO L125 PetriNetUnfolderBase]: For 611394/611394 co-relation queries the response was YES. [2024-06-14 14:00:29,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42173 conditions, 5321 events. 3177/5321 cut-off events. For 611394/611394 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 35489 event pairs, 645 based on Foata normal form. 8/5328 useless extension candidates. Maximal degree in co-relation 41949. Up to 4560 conditions per place. [2024-06-14 14:00:29,991 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 537 selfloop transitions, 130 changer transitions 0/673 dead transitions. [2024-06-14 14:00:29,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 673 transitions, 12322 flow [2024-06-14 14:00:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 14:00:29,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 14:00:29,992 INFO L175 Difference]: Start difference. First operand has 538 places, 650 transitions, 10880 flow. Second operand 8 states and 178 transitions. [2024-06-14 14:00:29,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 673 transitions, 12322 flow [2024-06-14 14:00:34,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 673 transitions, 12069 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:34,427 INFO L231 Difference]: Finished difference. Result has 540 places, 651 transitions, 10914 flow [2024-06-14 14:00:34,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10627, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10914, PETRI_PLACES=540, PETRI_TRANSITIONS=651} [2024-06-14 14:00:34,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-14 14:00:34,428 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 651 transitions, 10914 flow [2024-06-14 14:00:34,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:34,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:34,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:34,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-14 14:00:34,428 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:34,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:34,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1353632793, now seen corresponding path program 18 times [2024-06-14 14:00:34,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:34,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65651229] [2024-06-14 14:00:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:34,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:34,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:34,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65651229] [2024-06-14 14:00:34,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65651229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:34,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:34,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:34,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584573544] [2024-06-14 14:00:34,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:34,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:34,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:34,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:34,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:34,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 651 transitions, 10914 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:34,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:34,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:34,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:36,091 INFO L124 PetriNetUnfolderBase]: 3217/5387 cut-off events. [2024-06-14 14:00:36,092 INFO L125 PetriNetUnfolderBase]: For 637965/637965 co-relation queries the response was YES. [2024-06-14 14:00:36,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43203 conditions, 5387 events. 3217/5387 cut-off events. For 637965/637965 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 35898 event pairs, 629 based on Foata normal form. 6/5390 useless extension candidates. Maximal degree in co-relation 42978. Up to 3988 conditions per place. [2024-06-14 14:00:36,178 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 550 selfloop transitions, 133 changer transitions 0/689 dead transitions. [2024-06-14 14:00:36,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 689 transitions, 12980 flow [2024-06-14 14:00:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:36,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:00:36,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 14:00:36,179 INFO L175 Difference]: Start difference. First operand has 540 places, 651 transitions, 10914 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:00:36,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 689 transitions, 12980 flow [2024-06-14 14:00:40,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 689 transitions, 12717 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:40,436 INFO L231 Difference]: Finished difference. Result has 542 places, 653 transitions, 10975 flow [2024-06-14 14:00:40,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10651, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10975, PETRI_PLACES=542, PETRI_TRANSITIONS=653} [2024-06-14 14:00:40,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 500 predicate places. [2024-06-14 14:00:40,437 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 653 transitions, 10975 flow [2024-06-14 14:00:40,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:40,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:40,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:40,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-14 14:00:40,437 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:40,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:40,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1353512823, now seen corresponding path program 19 times [2024-06-14 14:00:40,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:40,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838682704] [2024-06-14 14:00:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:40,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:40,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838682704] [2024-06-14 14:00:40,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838682704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:40,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:40,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:40,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497741495] [2024-06-14 14:00:40,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:40,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:40,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:40,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:40,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:40,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:40,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 653 transitions, 10975 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:40,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:40,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:40,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:42,149 INFO L124 PetriNetUnfolderBase]: 3245/5428 cut-off events. [2024-06-14 14:00:42,149 INFO L125 PetriNetUnfolderBase]: For 649620/649620 co-relation queries the response was YES. [2024-06-14 14:00:42,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43707 conditions, 5428 events. 3245/5428 cut-off events. For 649620/649620 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 36253 event pairs, 658 based on Foata normal form. 6/5424 useless extension candidates. Maximal degree in co-relation 43481. Up to 4801 conditions per place. [2024-06-14 14:00:42,237 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 617 selfloop transitions, 59 changer transitions 0/682 dead transitions. [2024-06-14 14:00:42,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 682 transitions, 12447 flow [2024-06-14 14:00:42,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 14:00:42,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 14:00:42,238 INFO L175 Difference]: Start difference. First operand has 542 places, 653 transitions, 10975 flow. Second operand 8 states and 177 transitions. [2024-06-14 14:00:42,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 682 transitions, 12447 flow [2024-06-14 14:00:47,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 682 transitions, 12043 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:47,131 INFO L231 Difference]: Finished difference. Result has 544 places, 656 transitions, 10737 flow [2024-06-14 14:00:47,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10583, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10737, PETRI_PLACES=544, PETRI_TRANSITIONS=656} [2024-06-14 14:00:47,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-14 14:00:47,132 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 656 transitions, 10737 flow [2024-06-14 14:00:47,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:47,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:47,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:47,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-14 14:00:47,132 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:47,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1353512637, now seen corresponding path program 13 times [2024-06-14 14:00:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:47,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554824585] [2024-06-14 14:00:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:47,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:47,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:47,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554824585] [2024-06-14 14:00:47,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554824585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:47,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:47,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:47,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219578772] [2024-06-14 14:00:47,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:47,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:47,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:47,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:47,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:47,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 656 transitions, 10737 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:47,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:47,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:47,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:48,915 INFO L124 PetriNetUnfolderBase]: 3311/5534 cut-off events. [2024-06-14 14:00:48,915 INFO L125 PetriNetUnfolderBase]: For 720305/720305 co-relation queries the response was YES. [2024-06-14 14:00:48,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44894 conditions, 5534 events. 3311/5534 cut-off events. For 720305/720305 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 37106 event pairs, 676 based on Foata normal form. 6/5530 useless extension candidates. Maximal degree in co-relation 44668. Up to 4763 conditions per place. [2024-06-14 14:00:49,001 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 567 selfloop transitions, 118 changer transitions 0/691 dead transitions. [2024-06-14 14:00:49,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 691 transitions, 12551 flow [2024-06-14 14:00:49,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:00:49,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:00:49,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:00:49,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:00:49,002 INFO L175 Difference]: Start difference. First operand has 544 places, 656 transitions, 10737 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:00:49,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 691 transitions, 12551 flow [2024-06-14 14:00:53,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 691 transitions, 12419 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 14:00:53,405 INFO L231 Difference]: Finished difference. Result has 550 places, 658 transitions, 10911 flow [2024-06-14 14:00:53,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10605, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10911, PETRI_PLACES=550, PETRI_TRANSITIONS=658} [2024-06-14 14:00:53,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-14 14:00:53,406 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 658 transitions, 10911 flow [2024-06-14 14:00:53,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:53,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:53,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:53,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-14 14:00:53,406 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:53,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:53,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1087667673, now seen corresponding path program 20 times [2024-06-14 14:00:53,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:53,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406944707] [2024-06-14 14:00:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:53,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:53,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406944707] [2024-06-14 14:00:53,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406944707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:53,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:53,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:53,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292522200] [2024-06-14 14:00:53,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:53,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:53,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:53,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:53,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:53,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:53,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 658 transitions, 10911 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:53,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:53,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:53,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:55,138 INFO L124 PetriNetUnfolderBase]: 3339/5591 cut-off events. [2024-06-14 14:00:55,138 INFO L125 PetriNetUnfolderBase]: For 747894/747894 co-relation queries the response was YES. [2024-06-14 14:00:55,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45396 conditions, 5591 events. 3339/5591 cut-off events. For 747894/747894 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 37529 event pairs, 699 based on Foata normal form. 8/5598 useless extension candidates. Maximal degree in co-relation 45169. Up to 4972 conditions per place. [2024-06-14 14:00:55,231 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 618 selfloop transitions, 57 changer transitions 0/681 dead transitions. [2024-06-14 14:00:55,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 681 transitions, 12369 flow [2024-06-14 14:00:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:55,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 14:00:55,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 14:00:55,233 INFO L175 Difference]: Start difference. First operand has 550 places, 658 transitions, 10911 flow. Second operand 8 states and 174 transitions. [2024-06-14 14:00:55,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 681 transitions, 12369 flow [2024-06-14 14:01:00,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 681 transitions, 12191 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:00,835 INFO L231 Difference]: Finished difference. Result has 551 places, 659 transitions, 10874 flow [2024-06-14 14:01:00,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10733, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10874, PETRI_PLACES=551, PETRI_TRANSITIONS=659} [2024-06-14 14:01:00,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 509 predicate places. [2024-06-14 14:01:00,835 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 659 transitions, 10874 flow [2024-06-14 14:01:00,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:00,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:00,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:00,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-14 14:01:00,836 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:00,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:00,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1346103513, now seen corresponding path program 21 times [2024-06-14 14:01:00,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:00,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973107359] [2024-06-14 14:01:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:00,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:01,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:01,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973107359] [2024-06-14 14:01:01,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973107359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:01,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:01,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:01,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845760499] [2024-06-14 14:01:01,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:01,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:01,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:01,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:01,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:01,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:01,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 659 transitions, 10874 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:01,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:01,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:01,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:02,583 INFO L124 PetriNetUnfolderBase]: 3367/5637 cut-off events. [2024-06-14 14:01:02,584 INFO L125 PetriNetUnfolderBase]: For 740801/740801 co-relation queries the response was YES. [2024-06-14 14:01:02,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45635 conditions, 5637 events. 3367/5637 cut-off events. For 740801/740801 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 37928 event pairs, 697 based on Foata normal form. 6/5640 useless extension candidates. Maximal degree in co-relation 45406. Up to 4986 conditions per place. [2024-06-14 14:01:02,677 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 622 selfloop transitions, 60 changer transitions 0/688 dead transitions. [2024-06-14 14:01:02,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 688 transitions, 12384 flow [2024-06-14 14:01:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:02,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:02,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 14:01:02,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-14 14:01:02,678 INFO L175 Difference]: Start difference. First operand has 551 places, 659 transitions, 10874 flow. Second operand 9 states and 193 transitions. [2024-06-14 14:01:02,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 688 transitions, 12384 flow [2024-06-14 14:01:08,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 688 transitions, 12267 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:08,267 INFO L231 Difference]: Finished difference. Result has 555 places, 662 transitions, 10927 flow [2024-06-14 14:01:08,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10757, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10927, PETRI_PLACES=555, PETRI_TRANSITIONS=662} [2024-06-14 14:01:08,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 513 predicate places. [2024-06-14 14:01:08,267 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 662 transitions, 10927 flow [2024-06-14 14:01:08,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:08,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:08,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:08,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-14 14:01:08,268 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:08,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:08,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1087815357, now seen corresponding path program 14 times [2024-06-14 14:01:08,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:08,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796519831] [2024-06-14 14:01:08,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:08,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:08,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796519831] [2024-06-14 14:01:08,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796519831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:08,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:08,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:08,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699346287] [2024-06-14 14:01:08,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:08,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:08,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:08,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:08,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 662 transitions, 10927 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:08,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:08,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:08,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:10,041 INFO L124 PetriNetUnfolderBase]: 3433/5739 cut-off events. [2024-06-14 14:01:10,041 INFO L125 PetriNetUnfolderBase]: For 820543/820543 co-relation queries the response was YES. [2024-06-14 14:01:10,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47597 conditions, 5739 events. 3433/5739 cut-off events. For 820543/820543 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 38621 event pairs, 713 based on Foata normal form. 6/5742 useless extension candidates. Maximal degree in co-relation 47366. Up to 5007 conditions per place. [2024-06-14 14:01:10,140 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 572 selfloop transitions, 116 changer transitions 0/694 dead transitions. [2024-06-14 14:01:10,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 694 transitions, 12737 flow [2024-06-14 14:01:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:01:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:01:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-14 14:01:10,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-14 14:01:10,141 INFO L175 Difference]: Start difference. First operand has 555 places, 662 transitions, 10927 flow. Second operand 12 states and 249 transitions. [2024-06-14 14:01:10,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 694 transitions, 12737 flow [2024-06-14 14:01:16,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 694 transitions, 12611 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:16,881 INFO L231 Difference]: Finished difference. Result has 561 places, 664 transitions, 11095 flow [2024-06-14 14:01:16,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10801, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11095, PETRI_PLACES=561, PETRI_TRANSITIONS=664} [2024-06-14 14:01:16,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 519 predicate places. [2024-06-14 14:01:16,882 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 664 transitions, 11095 flow [2024-06-14 14:01:16,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:16,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:16,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:16,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-14 14:01:16,882 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:16,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:16,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1087488927, now seen corresponding path program 15 times [2024-06-14 14:01:16,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:16,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147094532] [2024-06-14 14:01:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:16,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:17,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:17,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147094532] [2024-06-14 14:01:17,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147094532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:17,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:17,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:17,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646205313] [2024-06-14 14:01:17,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:17,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:17,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:17,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:17,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:17,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:17,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 664 transitions, 11095 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:17,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:17,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:17,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:18,674 INFO L124 PetriNetUnfolderBase]: 3415/5715 cut-off events. [2024-06-14 14:01:18,674 INFO L125 PetriNetUnfolderBase]: For 782285/782285 co-relation queries the response was YES. [2024-06-14 14:01:18,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46536 conditions, 5715 events. 3415/5715 cut-off events. For 782285/782285 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 38467 event pairs, 713 based on Foata normal form. 8/5722 useless extension candidates. Maximal degree in co-relation 46304. Up to 5029 conditions per place. [2024-06-14 14:01:18,774 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 570 selfloop transitions, 113 changer transitions 0/689 dead transitions. [2024-06-14 14:01:18,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 689 transitions, 12555 flow [2024-06-14 14:01:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:01:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:01:18,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-14 14:01:18,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077605321507761 [2024-06-14 14:01:18,775 INFO L175 Difference]: Start difference. First operand has 561 places, 664 transitions, 11095 flow. Second operand 11 states and 229 transitions. [2024-06-14 14:01:18,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 689 transitions, 12555 flow [2024-06-14 14:01:25,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 689 transitions, 12378 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:25,374 INFO L231 Difference]: Finished difference. Result has 564 places, 664 transitions, 11149 flow [2024-06-14 14:01:25,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10918, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11149, PETRI_PLACES=564, PETRI_TRANSITIONS=664} [2024-06-14 14:01:25,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 522 predicate places. [2024-06-14 14:01:25,374 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 664 transitions, 11149 flow [2024-06-14 14:01:25,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:25,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:25,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:25,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-14 14:01:25,375 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:25,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:25,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1944554161, now seen corresponding path program 22 times [2024-06-14 14:01:25,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:25,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570062843] [2024-06-14 14:01:25,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:25,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:25,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:25,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570062843] [2024-06-14 14:01:25,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570062843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:25,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:25,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:25,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213944206] [2024-06-14 14:01:25,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:25,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:25,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:25,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:25,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:25,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:25,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 664 transitions, 11149 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:25,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:25,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:25,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:27,096 INFO L124 PetriNetUnfolderBase]: 3443/5759 cut-off events. [2024-06-14 14:01:27,096 INFO L125 PetriNetUnfolderBase]: For 792528/792528 co-relation queries the response was YES. [2024-06-14 14:01:27,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46943 conditions, 5759 events. 3443/5759 cut-off events. For 792528/792528 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 38856 event pairs, 717 based on Foata normal form. 8/5766 useless extension candidates. Maximal degree in co-relation 46709. Up to 5106 conditions per place. [2024-06-14 14:01:27,196 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 600 selfloop transitions, 78 changer transitions 0/684 dead transitions. [2024-06-14 14:01:27,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 684 transitions, 12607 flow [2024-06-14 14:01:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 14:01:27,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 14:01:27,197 INFO L175 Difference]: Start difference. First operand has 564 places, 664 transitions, 11149 flow. Second operand 8 states and 174 transitions. [2024-06-14 14:01:27,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 684 transitions, 12607 flow [2024-06-14 14:01:33,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 684 transitions, 12382 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 14:01:33,352 INFO L231 Difference]: Finished difference. Result has 563 places, 665 transitions, 11111 flow [2024-06-14 14:01:33,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10924, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11111, PETRI_PLACES=563, PETRI_TRANSITIONS=665} [2024-06-14 14:01:33,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 521 predicate places. [2024-06-14 14:01:33,352 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 665 transitions, 11111 flow [2024-06-14 14:01:33,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:33,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:33,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:33,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-14 14:01:33,352 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:33,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:33,353 INFO L85 PathProgramCache]: Analyzing trace with hash -783916289, now seen corresponding path program 16 times [2024-06-14 14:01:33,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:33,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336496915] [2024-06-14 14:01:33,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:33,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:33,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:33,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336496915] [2024-06-14 14:01:33,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336496915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:33,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:33,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:33,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704801910] [2024-06-14 14:01:33,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:33,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:33,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:33,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:33,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:33,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 665 transitions, 11111 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:33,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:33,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:33,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:35,140 INFO L124 PetriNetUnfolderBase]: 3471/5807 cut-off events. [2024-06-14 14:01:35,140 INFO L125 PetriNetUnfolderBase]: For 805472/805472 co-relation queries the response was YES. [2024-06-14 14:01:35,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47362 conditions, 5807 events. 3471/5807 cut-off events. For 805472/805472 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 39224 event pairs, 723 based on Foata normal form. 8/5814 useless extension candidates. Maximal degree in co-relation 47127. Up to 5117 conditions per place. [2024-06-14 14:01:35,244 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 573 selfloop transitions, 110 changer transitions 0/689 dead transitions. [2024-06-14 14:01:35,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 689 transitions, 12595 flow [2024-06-14 14:01:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:01:35,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:01:35,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-14 14:01:35,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:01:35,245 INFO L175 Difference]: Start difference. First operand has 563 places, 665 transitions, 11111 flow. Second operand 12 states and 246 transitions. [2024-06-14 14:01:35,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 689 transitions, 12595 flow [2024-06-14 14:01:41,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 689 transitions, 12436 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:41,458 INFO L231 Difference]: Finished difference. Result has 569 places, 666 transitions, 11209 flow [2024-06-14 14:01:41,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10952, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11209, PETRI_PLACES=569, PETRI_TRANSITIONS=666} [2024-06-14 14:01:41,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 527 predicate places. [2024-06-14 14:01:41,459 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 666 transitions, 11209 flow [2024-06-14 14:01:41,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:41,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:41,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:41,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-14 14:01:41,459 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:41,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:41,459 INFO L85 PathProgramCache]: Analyzing trace with hash -784095035, now seen corresponding path program 23 times [2024-06-14 14:01:41,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:41,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925076483] [2024-06-14 14:01:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:41,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:41,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:41,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925076483] [2024-06-14 14:01:41,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925076483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:41,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:41,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313128990] [2024-06-14 14:01:41,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:41,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:41,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:41,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:41,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 666 transitions, 11209 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:41,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:41,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:41,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:43,167 INFO L124 PetriNetUnfolderBase]: 3499/5851 cut-off events. [2024-06-14 14:01:43,168 INFO L125 PetriNetUnfolderBase]: For 818009/818009 co-relation queries the response was YES. [2024-06-14 14:01:43,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47809 conditions, 5851 events. 3499/5851 cut-off events. For 818009/818009 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 39528 event pairs, 727 based on Foata normal form. 8/5858 useless extension candidates. Maximal degree in co-relation 47573. Up to 5198 conditions per place. [2024-06-14 14:01:43,273 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 602 selfloop transitions, 80 changer transitions 0/688 dead transitions. [2024-06-14 14:01:43,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 688 transitions, 12679 flow [2024-06-14 14:01:43,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-14 14:01:43,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-14 14:01:43,274 INFO L175 Difference]: Start difference. First operand has 569 places, 666 transitions, 11209 flow. Second operand 10 states and 208 transitions. [2024-06-14 14:01:43,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 688 transitions, 12679 flow [2024-06-14 14:01:48,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 688 transitions, 12446 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 14:01:48,689 INFO L231 Difference]: Finished difference. Result has 569 places, 667 transitions, 11165 flow [2024-06-14 14:01:48,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10976, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11165, PETRI_PLACES=569, PETRI_TRANSITIONS=667} [2024-06-14 14:01:48,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 527 predicate places. [2024-06-14 14:01:48,689 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 667 transitions, 11165 flow [2024-06-14 14:01:48,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:48,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:48,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:48,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-14 14:01:48,690 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:48,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:48,690 INFO L85 PathProgramCache]: Analyzing trace with hash -784242905, now seen corresponding path program 24 times [2024-06-14 14:01:48,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:48,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180747354] [2024-06-14 14:01:48,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:48,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:48,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:48,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:48,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180747354] [2024-06-14 14:01:48,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180747354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:48,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:48,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:48,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576365850] [2024-06-14 14:01:48,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:48,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:48,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:49,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:49,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 667 transitions, 11165 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:49,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:49,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:49,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:50,486 INFO L124 PetriNetUnfolderBase]: 3527/5895 cut-off events. [2024-06-14 14:01:50,487 INFO L125 PetriNetUnfolderBase]: For 810882/810882 co-relation queries the response was YES. [2024-06-14 14:01:50,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48016 conditions, 5895 events. 3527/5895 cut-off events. For 810882/810882 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 39887 event pairs, 725 based on Foata normal form. 6/5900 useless extension candidates. Maximal degree in co-relation 47779. Up to 5176 conditions per place. [2024-06-14 14:01:50,595 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 604 selfloop transitions, 84 changer transitions 0/694 dead transitions. [2024-06-14 14:01:50,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 694 transitions, 12687 flow [2024-06-14 14:01:50,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:50,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 14:01:50,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 14:01:50,596 INFO L175 Difference]: Start difference. First operand has 569 places, 667 transitions, 11165 flow. Second operand 10 states and 210 transitions. [2024-06-14 14:01:50,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 694 transitions, 12687 flow [2024-06-14 14:01:57,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 694 transitions, 12522 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:57,129 INFO L231 Difference]: Finished difference. Result has 572 places, 670 transitions, 11229 flow [2024-06-14 14:01:57,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11000, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11229, PETRI_PLACES=572, PETRI_TRANSITIONS=670} [2024-06-14 14:01:57,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 530 predicate places. [2024-06-14 14:01:57,129 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 670 transitions, 11229 flow [2024-06-14 14:01:57,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:57,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:57,129 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, 1, 1] [2024-06-14 14:01:57,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-14 14:01:57,129 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:57,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:57,129 INFO L85 PathProgramCache]: Analyzing trace with hash -773191529, now seen corresponding path program 17 times [2024-06-14 14:01:57,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:57,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906706424] [2024-06-14 14:01:57,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:57,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:57,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:57,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906706424] [2024-06-14 14:01:57,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906706424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:57,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:57,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:57,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152090894] [2024-06-14 14:01:57,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:57,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:57,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:57,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:57,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:57,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 670 transitions, 11229 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:57,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:57,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:57,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:58,855 INFO L124 PetriNetUnfolderBase]: 3555/5943 cut-off events. [2024-06-14 14:01:58,855 INFO L125 PetriNetUnfolderBase]: For 841392/841392 co-relation queries the response was YES. [2024-06-14 14:01:58,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48554 conditions, 5943 events. 3555/5943 cut-off events. For 841392/841392 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 40290 event pairs, 737 based on Foata normal form. 8/5950 useless extension candidates. Maximal degree in co-relation 48315. Up to 5249 conditions per place. [2024-06-14 14:01:58,964 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 578 selfloop transitions, 108 changer transitions 0/692 dead transitions. [2024-06-14 14:01:58,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 692 transitions, 12717 flow [2024-06-14 14:01:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 14:01:58,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-14 14:01:58,965 INFO L175 Difference]: Start difference. First operand has 572 places, 670 transitions, 11229 flow. Second operand 10 states and 212 transitions. [2024-06-14 14:01:58,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 692 transitions, 12717 flow [2024-06-14 14:02:05,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 692 transitions, 12542 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:05,732 INFO L231 Difference]: Finished difference. Result has 575 places, 671 transitions, 11309 flow [2024-06-14 14:02:05,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11054, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11309, PETRI_PLACES=575, PETRI_TRANSITIONS=671} [2024-06-14 14:02:05,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 533 predicate places. [2024-06-14 14:02:05,733 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 671 transitions, 11309 flow [2024-06-14 14:02:05,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:05,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:05,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:05,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-14 14:02:05,733 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:05,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:05,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1950064225, now seen corresponding path program 18 times [2024-06-14 14:02:05,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:05,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005295043] [2024-06-14 14:02:05,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:05,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:06,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:06,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:06,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005295043] [2024-06-14 14:02:06,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005295043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:06,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:06,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:06,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087589077] [2024-06-14 14:02:06,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:06,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:06,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:06,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:06,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:06,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:06,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 671 transitions, 11309 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:06,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:06,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:06,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:07,491 INFO L124 PetriNetUnfolderBase]: 3575/5973 cut-off events. [2024-06-14 14:02:07,491 INFO L125 PetriNetUnfolderBase]: For 837002/837002 co-relation queries the response was YES. [2024-06-14 14:02:07,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48901 conditions, 5973 events. 3575/5973 cut-off events. For 837002/837002 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 40480 event pairs, 733 based on Foata normal form. 6/5976 useless extension candidates. Maximal degree in co-relation 48661. Up to 5219 conditions per place. [2024-06-14 14:02:07,599 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 578 selfloop transitions, 114 changer transitions 0/698 dead transitions. [2024-06-14 14:02:07,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 698 transitions, 12837 flow [2024-06-14 14:02:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:02:07,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:02:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-14 14:02:07,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-14 14:02:07,600 INFO L175 Difference]: Start difference. First operand has 575 places, 671 transitions, 11309 flow. Second operand 12 states and 248 transitions. [2024-06-14 14:02:07,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 698 transitions, 12837 flow [2024-06-14 14:02:13,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 698 transitions, 12606 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 14:02:13,657 INFO L231 Difference]: Finished difference. Result has 579 places, 672 transitions, 11346 flow [2024-06-14 14:02:13,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11078, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11346, PETRI_PLACES=579, PETRI_TRANSITIONS=672} [2024-06-14 14:02:13,657 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 537 predicate places. [2024-06-14 14:02:13,657 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 672 transitions, 11346 flow [2024-06-14 14:02:13,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:13,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:13,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:13,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-14 14:02:13,658 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:13,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash 197877595, now seen corresponding path program 19 times [2024-06-14 14:02:13,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:13,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552529266] [2024-06-14 14:02:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:13,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:13,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:13,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552529266] [2024-06-14 14:02:13,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552529266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:13,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:13,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:13,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559971513] [2024-06-14 14:02:13,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:13,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:13,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:13,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:13,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:13,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 672 transitions, 11346 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:13,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:13,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:13,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:15,395 INFO L124 PetriNetUnfolderBase]: 3603/6023 cut-off events. [2024-06-14 14:02:15,395 INFO L125 PetriNetUnfolderBase]: For 873545/873547 co-relation queries the response was YES. [2024-06-14 14:02:15,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49354 conditions, 6023 events. 3603/6023 cut-off events. For 873545/873547 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 40985 event pairs, 776 based on Foata normal form. 10/6032 useless extension candidates. Maximal degree in co-relation 49113. Up to 5325 conditions per place. [2024-06-14 14:02:15,510 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 586 selfloop transitions, 96 changer transitions 0/688 dead transitions. [2024-06-14 14:02:15,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 688 transitions, 12816 flow [2024-06-14 14:02:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 14:02:15,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-14 14:02:15,511 INFO L175 Difference]: Start difference. First operand has 579 places, 672 transitions, 11346 flow. Second operand 7 states and 153 transitions. [2024-06-14 14:02:15,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 688 transitions, 12816 flow [2024-06-14 14:02:21,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 688 transitions, 12575 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 14:02:21,775 INFO L231 Difference]: Finished difference. Result has 577 places, 673 transitions, 11340 flow [2024-06-14 14:02:21,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11105, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11340, PETRI_PLACES=577, PETRI_TRANSITIONS=673} [2024-06-14 14:02:21,776 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 535 predicate places. [2024-06-14 14:02:21,776 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 673 transitions, 11340 flow [2024-06-14 14:02:21,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:21,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:21,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:21,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-14 14:02:21,776 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:21,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1711973031, now seen corresponding path program 25 times [2024-06-14 14:02:21,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:21,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190438575] [2024-06-14 14:02:21,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:21,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:22,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:22,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190438575] [2024-06-14 14:02:22,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190438575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:22,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:22,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:22,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251369081] [2024-06-14 14:02:22,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:22,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:22,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:22,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:22,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:22,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:22,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 673 transitions, 11340 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:22,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:22,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:22,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:23,556 INFO L124 PetriNetUnfolderBase]: 3585/5993 cut-off events. [2024-06-14 14:02:23,556 INFO L125 PetriNetUnfolderBase]: For 804160/804160 co-relation queries the response was YES. [2024-06-14 14:02:23,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47986 conditions, 5993 events. 3585/5993 cut-off events. For 804160/804160 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 40762 event pairs, 725 based on Foata normal form. 8/6000 useless extension candidates. Maximal degree in co-relation 47744. Up to 5077 conditions per place. [2024-06-14 14:02:23,670 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 574 selfloop transitions, 128 changer transitions 0/708 dead transitions. [2024-06-14 14:02:23,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 708 transitions, 12866 flow [2024-06-14 14:02:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:23,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 14:02:23,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-14 14:02:23,671 INFO L175 Difference]: Start difference. First operand has 577 places, 673 transitions, 11340 flow. Second operand 9 states and 209 transitions. [2024-06-14 14:02:23,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 708 transitions, 12866 flow [2024-06-14 14:02:29,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 708 transitions, 12651 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:29,268 INFO L231 Difference]: Finished difference. Result has 581 places, 673 transitions, 11395 flow [2024-06-14 14:02:29,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11125, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11395, PETRI_PLACES=581, PETRI_TRANSITIONS=673} [2024-06-14 14:02:29,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 539 predicate places. [2024-06-14 14:02:29,268 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 673 transitions, 11395 flow [2024-06-14 14:02:29,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:29,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:29,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:29,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-14 14:02:29,269 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:29,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:29,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1722876537, now seen corresponding path program 20 times [2024-06-14 14:02:29,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:29,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170599348] [2024-06-14 14:02:29,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:29,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:29,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:29,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170599348] [2024-06-14 14:02:29,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170599348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:29,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:29,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:29,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727894315] [2024-06-14 14:02:29,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:29,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:29,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:29,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:29,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:29,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:29,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 673 transitions, 11395 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:29,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:29,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:29,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:31,182 INFO L124 PetriNetUnfolderBase]: 3613/6037 cut-off events. [2024-06-14 14:02:31,182 INFO L125 PetriNetUnfolderBase]: For 814765/814765 co-relation queries the response was YES. [2024-06-14 14:02:31,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48531 conditions, 6037 events. 3613/6037 cut-off events. For 814765/814765 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 41098 event pairs, 741 based on Foata normal form. 8/6044 useless extension candidates. Maximal degree in co-relation 48288. Up to 5311 conditions per place. [2024-06-14 14:02:31,303 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 582 selfloop transitions, 106 changer transitions 0/694 dead transitions. [2024-06-14 14:02:31,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 694 transitions, 12891 flow [2024-06-14 14:02:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 14:02:31,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-14 14:02:31,304 INFO L175 Difference]: Start difference. First operand has 581 places, 673 transitions, 11395 flow. Second operand 9 states and 193 transitions. [2024-06-14 14:02:31,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 694 transitions, 12891 flow [2024-06-14 14:02:38,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 694 transitions, 12621 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 14:02:38,403 INFO L231 Difference]: Finished difference. Result has 581 places, 674 transitions, 11385 flow [2024-06-14 14:02:38,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11125, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11385, PETRI_PLACES=581, PETRI_TRANSITIONS=674} [2024-06-14 14:02:38,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 539 predicate places. [2024-06-14 14:02:38,404 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 674 transitions, 11385 flow [2024-06-14 14:02:38,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:38,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:38,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:38,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-14 14:02:38,404 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:38,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:38,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1717335411, now seen corresponding path program 26 times [2024-06-14 14:02:38,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:38,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360984961] [2024-06-14 14:02:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:38,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:38,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360984961] [2024-06-14 14:02:38,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360984961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:38,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:38,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:38,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971890812] [2024-06-14 14:02:38,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:38,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:38,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:38,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:38,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:38,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:38,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 674 transitions, 11385 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:38,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:38,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:38,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:40,201 INFO L124 PetriNetUnfolderBase]: 3595/6011 cut-off events. [2024-06-14 14:02:40,201 INFO L125 PetriNetUnfolderBase]: For 719450/719450 co-relation queries the response was YES. [2024-06-14 14:02:40,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47016 conditions, 6011 events. 3595/6011 cut-off events. For 719450/719450 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 40955 event pairs, 721 based on Foata normal form. 8/6018 useless extension candidates. Maximal degree in co-relation 46773. Up to 5109 conditions per place. [2024-06-14 14:02:40,317 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 574 selfloop transitions, 121 changer transitions 0/701 dead transitions. [2024-06-14 14:02:40,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 701 transitions, 12877 flow [2024-06-14 14:02:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:02:40,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 14:02:40,318 INFO L175 Difference]: Start difference. First operand has 581 places, 674 transitions, 11385 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:02:40,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 701 transitions, 12877 flow [2024-06-14 14:02:44,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 701 transitions, 12641 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:44,876 INFO L231 Difference]: Finished difference. Result has 581 places, 674 transitions, 11408 flow [2024-06-14 14:02:44,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11149, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=11408, PETRI_PLACES=581, PETRI_TRANSITIONS=674} [2024-06-14 14:02:44,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 539 predicate places. [2024-06-14 14:02:44,876 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 674 transitions, 11408 flow [2024-06-14 14:02:44,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:44,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:44,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:44,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-14 14:02:44,877 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:44,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:44,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1712151777, now seen corresponding path program 21 times [2024-06-14 14:02:44,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:44,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997547362] [2024-06-14 14:02:44,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:44,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:45,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:45,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:45,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997547362] [2024-06-14 14:02:45,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997547362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:45,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:45,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:45,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868080943] [2024-06-14 14:02:45,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:45,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:45,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:45,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:45,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:45,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:45,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 674 transitions, 11408 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:45,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:45,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:45,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:46,675 INFO L124 PetriNetUnfolderBase]: 3610/6040 cut-off events. [2024-06-14 14:02:46,676 INFO L125 PetriNetUnfolderBase]: For 700497/700497 co-relation queries the response was YES. [2024-06-14 14:02:46,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46902 conditions, 6040 events. 3610/6040 cut-off events. For 700497/700497 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 41155 event pairs, 738 based on Foata normal form. 8/6047 useless extension candidates. Maximal degree in co-relation 46658. Up to 5278 conditions per place. [2024-06-14 14:02:46,801 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 579 selfloop transitions, 114 changer transitions 0/699 dead transitions. [2024-06-14 14:02:46,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 699 transitions, 12924 flow [2024-06-14 14:02:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:46,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:46,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 14:02:46,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-14 14:02:46,802 INFO L175 Difference]: Start difference. First operand has 581 places, 674 transitions, 11408 flow. Second operand 10 states and 212 transitions. [2024-06-14 14:02:46,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 699 transitions, 12924 flow [2024-06-14 14:02:51,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 699 transitions, 12663 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:51,828 INFO L231 Difference]: Finished difference. Result has 584 places, 675 transitions, 11426 flow [2024-06-14 14:02:51,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11147, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11426, PETRI_PLACES=584, PETRI_TRANSITIONS=675} [2024-06-14 14:02:51,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 542 predicate places. [2024-06-14 14:02:51,829 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 675 transitions, 11426 flow [2024-06-14 14:02:51,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:51,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:51,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:51,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-14 14:02:51,829 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:51,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:51,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1711825347, now seen corresponding path program 22 times [2024-06-14 14:02:51,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:51,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6631109] [2024-06-14 14:02:51,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:51,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:51,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:52,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:52,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6631109] [2024-06-14 14:02:52,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6631109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:52,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:52,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:52,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12195483] [2024-06-14 14:02:52,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:52,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:52,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:52,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:52,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:52,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:52,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 675 transitions, 11426 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:52,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:52,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:52,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:53,624 INFO L124 PetriNetUnfolderBase]: 3597/6008 cut-off events. [2024-06-14 14:02:53,624 INFO L125 PetriNetUnfolderBase]: For 617305/617305 co-relation queries the response was YES. [2024-06-14 14:02:53,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45802 conditions, 6008 events. 3597/6008 cut-off events. For 617305/617305 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 40829 event pairs, 694 based on Foata normal form. 6/6000 useless extension candidates. Maximal degree in co-relation 45558. Up to 5023 conditions per place. [2024-06-14 14:02:53,736 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 569 selfloop transitions, 130 changer transitions 0/705 dead transitions. [2024-06-14 14:02:53,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 705 transitions, 12946 flow [2024-06-14 14:02:53,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 14:02:53,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-14 14:02:53,737 INFO L175 Difference]: Start difference. First operand has 584 places, 675 transitions, 11426 flow. Second operand 10 states and 218 transitions. [2024-06-14 14:02:53,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 705 transitions, 12946 flow [2024-06-14 14:02:58,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 705 transitions, 12686 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-14 14:02:58,623 INFO L231 Difference]: Finished difference. Result has 585 places, 675 transitions, 11436 flow [2024-06-14 14:02:58,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11166, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11436, PETRI_PLACES=585, PETRI_TRANSITIONS=675} [2024-06-14 14:02:58,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 543 predicate places. [2024-06-14 14:02:58,624 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 675 transitions, 11436 flow [2024-06-14 14:02:58,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:58,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:58,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:58,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-14 14:02:58,624 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:58,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:58,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1931074213, now seen corresponding path program 27 times [2024-06-14 14:02:58,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:58,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638193516] [2024-06-14 14:02:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:58,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:58,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:58,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:58,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638193516] [2024-06-14 14:02:58,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638193516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:58,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:58,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187565913] [2024-06-14 14:02:58,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:58,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:58,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:58,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 675 transitions, 11436 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:58,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:58,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:58,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:00,418 INFO L124 PetriNetUnfolderBase]: 3584/5996 cut-off events. [2024-06-14 14:03:00,418 INFO L125 PetriNetUnfolderBase]: For 552769/552769 co-relation queries the response was YES. [2024-06-14 14:03:00,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44763 conditions, 5996 events. 3584/5996 cut-off events. For 552769/552769 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 40918 event pairs, 649 based on Foata normal form. 6/5995 useless extension candidates. Maximal degree in co-relation 44519. Up to 4731 conditions per place. [2024-06-14 14:03:00,533 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 564 selfloop transitions, 143 changer transitions 0/713 dead transitions. [2024-06-14 14:03:00,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 713 transitions, 12994 flow [2024-06-14 14:03:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:03:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:03:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 14:03:00,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-14 14:03:00,533 INFO L175 Difference]: Start difference. First operand has 585 places, 675 transitions, 11436 flow. Second operand 9 states and 211 transitions. [2024-06-14 14:03:00,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 713 transitions, 12994 flow [2024-06-14 14:03:05,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 713 transitions, 12710 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-14 14:03:05,578 INFO L231 Difference]: Finished difference. Result has 584 places, 675 transitions, 11448 flow [2024-06-14 14:03:05,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11152, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11448, PETRI_PLACES=584, PETRI_TRANSITIONS=675} [2024-06-14 14:03:05,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 542 predicate places. [2024-06-14 14:03:05,578 INFO L495 AbstractCegarLoop]: Abstraction has has 584 places, 675 transitions, 11448 flow [2024-06-14 14:03:05,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:05,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:05,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:05,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-14 14:03:05,578 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:05,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:05,579 INFO L85 PathProgramCache]: Analyzing trace with hash -765903577, now seen corresponding path program 1 times [2024-06-14 14:03:05,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:05,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007252361] [2024-06-14 14:03:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:05,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:05,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:05,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007252361] [2024-06-14 14:03:05,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007252361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:05,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:05,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:05,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122347103] [2024-06-14 14:03:05,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:05,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:05,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:05,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:05,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:05,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:05,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 584 places, 675 transitions, 11448 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:05,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:05,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:05,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:07,299 INFO L124 PetriNetUnfolderBase]: 3604/6038 cut-off events. [2024-06-14 14:03:07,300 INFO L125 PetriNetUnfolderBase]: For 536576/536576 co-relation queries the response was YES. [2024-06-14 14:03:07,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44903 conditions, 6038 events. 3604/6038 cut-off events. For 536576/536576 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 41101 event pairs, 650 based on Foata normal form. 6/6043 useless extension candidates. Maximal degree in co-relation 44660. Up to 4211 conditions per place. [2024-06-14 14:03:07,414 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 556 selfloop transitions, 149 changer transitions 0/711 dead transitions. [2024-06-14 14:03:07,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 711 transitions, 13306 flow [2024-06-14 14:03:07,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:03:07,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 14:03:07,414 INFO L175 Difference]: Start difference. First operand has 584 places, 675 transitions, 11448 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:03:07,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 711 transitions, 13306 flow [2024-06-14 14:03:11,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 582 places, 711 transitions, 13002 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 14:03:11,903 INFO L231 Difference]: Finished difference. Result has 583 places, 676 transitions, 11476 flow [2024-06-14 14:03:11,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11150, PETRI_DIFFERENCE_MINUEND_PLACES=575, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11476, PETRI_PLACES=583, PETRI_TRANSITIONS=676} [2024-06-14 14:03:11,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 541 predicate places. [2024-06-14 14:03:11,904 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 676 transitions, 11476 flow [2024-06-14 14:03:11,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:11,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:11,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:11,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-14 14:03:11,904 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:11,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1311963321, now seen corresponding path program 1 times [2024-06-14 14:03:11,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:11,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157717055] [2024-06-14 14:03:11,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:11,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:12,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:12,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157717055] [2024-06-14 14:03:12,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157717055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:12,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:12,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:12,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909037118] [2024-06-14 14:03:12,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:12,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:12,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:12,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:12,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:12,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:12,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 676 transitions, 11476 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:12,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:12,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:12,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:13,816 INFO L124 PetriNetUnfolderBase]: 3719/6226 cut-off events. [2024-06-14 14:03:13,816 INFO L125 PetriNetUnfolderBase]: For 594824/594830 co-relation queries the response was YES. [2024-06-14 14:03:13,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47149 conditions, 6226 events. 3719/6226 cut-off events. For 594824/594830 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 42724 event pairs, 693 based on Foata normal form. 12/6238 useless extension candidates. Maximal degree in co-relation 46906. Up to 4983 conditions per place. [2024-06-14 14:03:13,941 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 536 selfloop transitions, 179 changer transitions 0/721 dead transitions. [2024-06-14 14:03:13,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 593 places, 721 transitions, 13481 flow [2024-06-14 14:03:13,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-14 14:03:13,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254988913525499 [2024-06-14 14:03:13,942 INFO L175 Difference]: Start difference. First operand has 583 places, 676 transitions, 11476 flow. Second operand 11 states and 237 transitions. [2024-06-14 14:03:13,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 593 places, 721 transitions, 13481 flow [2024-06-14 14:03:19,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 721 transitions, 12984 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:19,180 INFO L231 Difference]: Finished difference. Result has 589 places, 685 transitions, 11593 flow [2024-06-14 14:03:19,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11001, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11593, PETRI_PLACES=589, PETRI_TRANSITIONS=685} [2024-06-14 14:03:19,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 547 predicate places. [2024-06-14 14:03:19,180 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 685 transitions, 11593 flow [2024-06-14 14:03:19,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:19,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:19,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-14 14:03:19,181 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:19,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:19,181 INFO L85 PathProgramCache]: Analyzing trace with hash -146142187, now seen corresponding path program 2 times [2024-06-14 14:03:19,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:19,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342090515] [2024-06-14 14:03:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:19,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:19,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:19,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342090515] [2024-06-14 14:03:19,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342090515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:19,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:19,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:19,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620501436] [2024-06-14 14:03:19,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:19,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:19,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:19,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:19,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:19,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:19,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 685 transitions, 11593 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:19,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:19,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:19,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:20,980 INFO L124 PetriNetUnfolderBase]: 3739/6261 cut-off events. [2024-06-14 14:03:20,981 INFO L125 PetriNetUnfolderBase]: For 600774/600774 co-relation queries the response was YES. [2024-06-14 14:03:21,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46723 conditions, 6261 events. 3739/6261 cut-off events. For 600774/600774 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 42825 event pairs, 649 based on Foata normal form. 6/6266 useless extension candidates. Maximal degree in co-relation 46479. Up to 4341 conditions per place. [2024-06-14 14:03:21,096 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 559 selfloop transitions, 154 changer transitions 0/719 dead transitions. [2024-06-14 14:03:21,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 719 transitions, 13466 flow [2024-06-14 14:03:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 14:03:21,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 14:03:21,097 INFO L175 Difference]: Start difference. First operand has 589 places, 685 transitions, 11593 flow. Second operand 8 states and 188 transitions. [2024-06-14 14:03:21,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 719 transitions, 13466 flow [2024-06-14 14:03:25,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 589 places, 719 transitions, 13238 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:25,751 INFO L231 Difference]: Finished difference. Result has 590 places, 686 transitions, 11695 flow [2024-06-14 14:03:25,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11367, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11695, PETRI_PLACES=590, PETRI_TRANSITIONS=686} [2024-06-14 14:03:25,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 548 predicate places. [2024-06-14 14:03:25,752 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 686 transitions, 11695 flow [2024-06-14 14:03:25,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:25,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:25,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:25,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-14 14:03:25,752 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:25,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:25,753 INFO L85 PathProgramCache]: Analyzing trace with hash -57572335, now seen corresponding path program 2 times [2024-06-14 14:03:25,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:25,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103879493] [2024-06-14 14:03:25,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:25,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:26,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:26,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103879493] [2024-06-14 14:03:26,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103879493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:26,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:26,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:26,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304604607] [2024-06-14 14:03:26,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:26,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:26,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:26,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:26,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:26,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:26,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 686 transitions, 11695 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:26,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:26,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:26,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:27,636 INFO L124 PetriNetUnfolderBase]: 3767/6310 cut-off events. [2024-06-14 14:03:27,637 INFO L125 PetriNetUnfolderBase]: For 622625/622631 co-relation queries the response was YES. [2024-06-14 14:03:27,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47540 conditions, 6310 events. 3767/6310 cut-off events. For 622625/622631 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 43408 event pairs, 767 based on Foata normal form. 14/6324 useless extension candidates. Maximal degree in co-relation 47295. Up to 5521 conditions per place. [2024-06-14 14:03:27,765 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 546 selfloop transitions, 160 changer transitions 0/712 dead transitions. [2024-06-14 14:03:27,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 712 transitions, 13224 flow [2024-06-14 14:03:27,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:27,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-14 14:03:27,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-14 14:03:27,766 INFO L175 Difference]: Start difference. First operand has 590 places, 686 transitions, 11695 flow. Second operand 11 states and 230 transitions. [2024-06-14 14:03:27,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 712 transitions, 13224 flow [2024-06-14 14:03:32,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 712 transitions, 12989 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:03:32,981 INFO L231 Difference]: Finished difference. Result has 596 places, 687 transitions, 11819 flow [2024-06-14 14:03:32,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11460, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11819, PETRI_PLACES=596, PETRI_TRANSITIONS=687} [2024-06-14 14:03:32,982 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 554 predicate places. [2024-06-14 14:03:32,982 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 687 transitions, 11819 flow [2024-06-14 14:03:32,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:32,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:32,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:32,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-14 14:03:32,982 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:32,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:32,982 INFO L85 PathProgramCache]: Analyzing trace with hash -57576427, now seen corresponding path program 3 times [2024-06-14 14:03:32,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:32,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117947000] [2024-06-14 14:03:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:32,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:33,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:33,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117947000] [2024-06-14 14:03:33,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117947000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:33,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:33,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:33,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476067976] [2024-06-14 14:03:33,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:33,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:33,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:33,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:33,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:33,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 687 transitions, 11819 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:33,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:33,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:33,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:34,831 INFO L124 PetriNetUnfolderBase]: 3787/6339 cut-off events. [2024-06-14 14:03:34,831 INFO L125 PetriNetUnfolderBase]: For 613182/613182 co-relation queries the response was YES. [2024-06-14 14:03:34,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47636 conditions, 6339 events. 3787/6339 cut-off events. For 613182/613182 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 43636 event pairs, 771 based on Foata normal form. 6/6340 useless extension candidates. Maximal degree in co-relation 47390. Up to 5380 conditions per place. [2024-06-14 14:03:34,955 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 571 selfloop transitions, 136 changer transitions 0/713 dead transitions. [2024-06-14 14:03:34,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 713 transitions, 13363 flow [2024-06-14 14:03:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:34,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:34,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 14:03:34,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 14:03:34,955 INFO L175 Difference]: Start difference. First operand has 596 places, 687 transitions, 11819 flow. Second operand 8 states and 181 transitions. [2024-06-14 14:03:34,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 713 transitions, 13363 flow [2024-06-14 14:03:40,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 713 transitions, 13037 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 14:03:40,248 INFO L231 Difference]: Finished difference. Result has 595 places, 688 transitions, 11788 flow [2024-06-14 14:03:40,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11493, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11788, PETRI_PLACES=595, PETRI_TRANSITIONS=688} [2024-06-14 14:03:40,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 553 predicate places. [2024-06-14 14:03:40,249 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 688 transitions, 11788 flow [2024-06-14 14:03:40,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:40,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:40,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:40,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-14 14:03:40,249 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:40,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:40,249 INFO L85 PathProgramCache]: Analyzing trace with hash -57576055, now seen corresponding path program 3 times [2024-06-14 14:03:40,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:40,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938367564] [2024-06-14 14:03:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:40,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:40,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:40,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938367564] [2024-06-14 14:03:40,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938367564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:40,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:40,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:40,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437069618] [2024-06-14 14:03:40,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:40,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:40,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:40,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:40,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:40,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 688 transitions, 11788 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:40,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:40,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:40,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:42,157 INFO L124 PetriNetUnfolderBase]: 3807/6376 cut-off events. [2024-06-14 14:03:42,157 INFO L125 PetriNetUnfolderBase]: For 623262/623268 co-relation queries the response was YES. [2024-06-14 14:03:42,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47918 conditions, 6376 events. 3807/6376 cut-off events. For 623262/623268 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 43949 event pairs, 761 based on Foata normal form. 12/6388 useless extension candidates. Maximal degree in co-relation 47671. Up to 5523 conditions per place. [2024-06-14 14:03:42,276 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 547 selfloop transitions, 166 changer transitions 0/719 dead transitions. [2024-06-14 14:03:42,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 606 places, 719 transitions, 13368 flow [2024-06-14 14:03:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:03:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:03:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-14 14:03:42,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508130081300813 [2024-06-14 14:03:42,277 INFO L175 Difference]: Start difference. First operand has 595 places, 688 transitions, 11788 flow. Second operand 12 states and 250 transitions. [2024-06-14 14:03:42,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 606 places, 719 transitions, 13368 flow [2024-06-14 14:03:47,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 719 transitions, 13093 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:03:47,934 INFO L231 Difference]: Finished difference. Result has 602 places, 690 transitions, 11910 flow [2024-06-14 14:03:47,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11515, PETRI_DIFFERENCE_MINUEND_PLACES=589, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11910, PETRI_PLACES=602, PETRI_TRANSITIONS=690} [2024-06-14 14:03:47,935 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 560 predicate places. [2024-06-14 14:03:47,935 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 690 transitions, 11910 flow [2024-06-14 14:03:47,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:47,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:47,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:47,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-14 14:03:47,935 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:47,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:47,936 INFO L85 PathProgramCache]: Analyzing trace with hash -773006831, now seen corresponding path program 4 times [2024-06-14 14:03:47,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:47,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752568686] [2024-06-14 14:03:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:47,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:48,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:48,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752568686] [2024-06-14 14:03:48,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752568686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:48,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:48,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:48,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946381014] [2024-06-14 14:03:48,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:48,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:48,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:48,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:48,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:48,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:48,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 690 transitions, 11910 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:48,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:48,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:48,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:50,002 INFO L124 PetriNetUnfolderBase]: 3835/6422 cut-off events. [2024-06-14 14:03:50,002 INFO L125 PetriNetUnfolderBase]: For 651071/651077 co-relation queries the response was YES. [2024-06-14 14:03:50,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48468 conditions, 6422 events. 3835/6422 cut-off events. For 651071/651077 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 44262 event pairs, 781 based on Foata normal form. 14/6436 useless extension candidates. Maximal degree in co-relation 48219. Up to 5732 conditions per place. [2024-06-14 14:03:50,128 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 616 selfloop transitions, 92 changer transitions 0/714 dead transitions. [2024-06-14 14:03:50,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 714 transitions, 13441 flow [2024-06-14 14:03:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:03:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:03:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-14 14:03:50,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-14 14:03:50,129 INFO L175 Difference]: Start difference. First operand has 602 places, 690 transitions, 11910 flow. Second operand 12 states and 244 transitions. [2024-06-14 14:03:50,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 714 transitions, 13441 flow [2024-06-14 14:03:55,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 714 transitions, 13102 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 14:03:55,741 INFO L231 Difference]: Finished difference. Result has 604 places, 691 transitions, 11798 flow [2024-06-14 14:03:55,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11571, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11798, PETRI_PLACES=604, PETRI_TRANSITIONS=691} [2024-06-14 14:03:55,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 562 predicate places. [2024-06-14 14:03:55,742 INFO L495 AbstractCegarLoop]: Abstraction has has 604 places, 691 transitions, 11798 flow [2024-06-14 14:03:55,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:55,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:55,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:55,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-14 14:03:55,742 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:55,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash -778369211, now seen corresponding path program 5 times [2024-06-14 14:03:55,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:55,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808245402] [2024-06-14 14:03:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:55,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:56,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:56,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808245402] [2024-06-14 14:03:56,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808245402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:56,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:56,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:56,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493498184] [2024-06-14 14:03:56,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:56,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:56,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:56,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:56,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:56,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:56,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 604 places, 691 transitions, 11798 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:56,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:56,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:56,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:57,722 INFO L124 PetriNetUnfolderBase]: 3863/6470 cut-off events. [2024-06-14 14:03:57,722 INFO L125 PetriNetUnfolderBase]: For 652056/652062 co-relation queries the response was YES. [2024-06-14 14:03:57,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48629 conditions, 6470 events. 3863/6470 cut-off events. For 652056/652062 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44714 event pairs, 787 based on Foata normal form. 14/6484 useless extension candidates. Maximal degree in co-relation 48380. Up to 5776 conditions per place. [2024-06-14 14:03:57,848 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 616 selfloop transitions, 92 changer transitions 0/714 dead transitions. [2024-06-14 14:03:57,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 714 transitions, 13329 flow [2024-06-14 14:03:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-14 14:03:57,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-14 14:03:57,850 INFO L175 Difference]: Start difference. First operand has 604 places, 691 transitions, 11798 flow. Second operand 11 states and 227 transitions. [2024-06-14 14:03:57,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 714 transitions, 13329 flow [2024-06-14 14:04:04,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 606 places, 714 transitions, 13167 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:04,157 INFO L231 Difference]: Finished difference. Result has 607 places, 692 transitions, 11865 flow [2024-06-14 14:04:04,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11636, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11865, PETRI_PLACES=607, PETRI_TRANSITIONS=692} [2024-06-14 14:04:04,157 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 565 predicate places. [2024-06-14 14:04:04,157 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 692 transitions, 11865 flow [2024-06-14 14:04:04,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:04,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:04,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:04,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-14 14:04:04,158 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:04,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:04,158 INFO L85 PathProgramCache]: Analyzing trace with hash -778517453, now seen corresponding path program 4 times [2024-06-14 14:04:04,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:04,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788493882] [2024-06-14 14:04:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:04,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:04,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:04,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788493882] [2024-06-14 14:04:04,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788493882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:04,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:04,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:04,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538264250] [2024-06-14 14:04:04,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:04,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:04,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:04,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:04,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:04,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:04,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 692 transitions, 11865 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:04,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:04,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:04,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:06,226 INFO L124 PetriNetUnfolderBase]: 3883/6499 cut-off events. [2024-06-14 14:04:06,226 INFO L125 PetriNetUnfolderBase]: For 641190/641190 co-relation queries the response was YES. [2024-06-14 14:04:06,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48815 conditions, 6499 events. 3883/6499 cut-off events. For 641190/641190 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 44896 event pairs, 791 based on Foata normal form. 6/6500 useless extension candidates. Maximal degree in co-relation 48565. Up to 5658 conditions per place. [2024-06-14 14:04:06,352 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 626 selfloop transitions, 83 changer transitions 0/715 dead transitions. [2024-06-14 14:04:06,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 715 transitions, 13407 flow [2024-06-14 14:04:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:06,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 14:04:06,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 14:04:06,353 INFO L175 Difference]: Start difference. First operand has 607 places, 692 transitions, 11865 flow. Second operand 8 states and 177 transitions. [2024-06-14 14:04:06,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 715 transitions, 13407 flow [2024-06-14 14:04:12,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 605 places, 715 transitions, 13211 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 14:04:12,205 INFO L231 Difference]: Finished difference. Result has 606 places, 693 transitions, 11860 flow [2024-06-14 14:04:12,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11669, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11860, PETRI_PLACES=606, PETRI_TRANSITIONS=693} [2024-06-14 14:04:12,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 564 predicate places. [2024-06-14 14:04:12,206 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 693 transitions, 11860 flow [2024-06-14 14:04:12,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:12,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:12,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:12,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-14 14:04:12,206 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:12,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:12,206 INFO L85 PathProgramCache]: Analyzing trace with hash -778517081, now seen corresponding path program 6 times [2024-06-14 14:04:12,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:12,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622895424] [2024-06-14 14:04:12,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:12,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:12,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:12,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622895424] [2024-06-14 14:04:12,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622895424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:12,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:12,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:12,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879812981] [2024-06-14 14:04:12,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:12,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:12,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:12,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:12,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 693 transitions, 11860 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:12,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:12,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:12,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:14,676 INFO L124 PetriNetUnfolderBase]: 3911/6548 cut-off events. [2024-06-14 14:04:14,676 INFO L125 PetriNetUnfolderBase]: For 651327/651333 co-relation queries the response was YES. [2024-06-14 14:04:14,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49176 conditions, 6548 events. 3911/6548 cut-off events. For 651327/651333 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 45296 event pairs, 781 based on Foata normal form. 12/6560 useless extension candidates. Maximal degree in co-relation 48925. Up to 5722 conditions per place. [2024-06-14 14:04:14,872 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 618 selfloop transitions, 97 changer transitions 0/721 dead transitions. [2024-06-14 14:04:14,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 721 transitions, 13465 flow [2024-06-14 14:04:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-14 14:04:14,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5077605321507761 [2024-06-14 14:04:14,873 INFO L175 Difference]: Start difference. First operand has 606 places, 693 transitions, 11860 flow. Second operand 11 states and 229 transitions. [2024-06-14 14:04:14,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 721 transitions, 13465 flow [2024-06-14 14:04:20,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 721 transitions, 13293 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:20,433 INFO L231 Difference]: Finished difference. Result has 612 places, 696 transitions, 11988 flow [2024-06-14 14:04:20,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11691, PETRI_DIFFERENCE_MINUEND_PLACES=600, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11988, PETRI_PLACES=612, PETRI_TRANSITIONS=696} [2024-06-14 14:04:20,434 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 570 predicate places. [2024-06-14 14:04:20,434 INFO L495 AbstractCegarLoop]: Abstraction has has 612 places, 696 transitions, 11988 flow [2024-06-14 14:04:20,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:20,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:20,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:20,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-14 14:04:20,434 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:20,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:20,434 INFO L85 PathProgramCache]: Analyzing trace with hash -772791629, now seen corresponding path program 1 times [2024-06-14 14:04:20,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:20,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008405716] [2024-06-14 14:04:20,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:20,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:20,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:20,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008405716] [2024-06-14 14:04:20,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008405716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:20,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:20,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:20,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854234797] [2024-06-14 14:04:20,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:20,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:20,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:20,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:20,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:20,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:20,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 612 places, 696 transitions, 11988 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:20,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:20,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:20,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:22,814 INFO L124 PetriNetUnfolderBase]: 3931/6584 cut-off events. [2024-06-14 14:04:22,814 INFO L125 PetriNetUnfolderBase]: For 662411/662417 co-relation queries the response was YES. [2024-06-14 14:04:22,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49623 conditions, 6584 events. 3931/6584 cut-off events. For 662411/662417 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 45565 event pairs, 787 based on Foata normal form. 12/6596 useless extension candidates. Maximal degree in co-relation 49370. Up to 5746 conditions per place. [2024-06-14 14:04:22,936 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 615 selfloop transitions, 102 changer transitions 0/723 dead transitions. [2024-06-14 14:04:22,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 723 transitions, 13556 flow [2024-06-14 14:04:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:04:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:04:22,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-14 14:04:22,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:04:22,937 INFO L175 Difference]: Start difference. First operand has 612 places, 696 transitions, 11988 flow. Second operand 12 states and 246 transitions. [2024-06-14 14:04:22,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 723 transitions, 13556 flow [2024-06-14 14:04:28,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 723 transitions, 13361 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:28,851 INFO L231 Difference]: Finished difference. Result has 616 places, 697 transitions, 12034 flow [2024-06-14 14:04:28,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11793, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12034, PETRI_PLACES=616, PETRI_TRANSITIONS=697} [2024-06-14 14:04:28,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 574 predicate places. [2024-06-14 14:04:28,852 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 697 transitions, 12034 flow [2024-06-14 14:04:28,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:28,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:28,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:28,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-14 14:04:28,852 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:28,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:28,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1938613321, now seen corresponding path program 1 times [2024-06-14 14:04:28,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:28,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192805769] [2024-06-14 14:04:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:28,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:29,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:29,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192805769] [2024-06-14 14:04:29,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192805769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:29,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:29,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:29,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792852368] [2024-06-14 14:04:29,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:29,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:29,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:29,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:29,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:29,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 697 transitions, 12034 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:29,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:29,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:29,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:31,235 INFO L124 PetriNetUnfolderBase]: 3951/6615 cut-off events. [2024-06-14 14:04:31,235 INFO L125 PetriNetUnfolderBase]: For 669512/669512 co-relation queries the response was YES. [2024-06-14 14:04:31,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49911 conditions, 6615 events. 3951/6615 cut-off events. For 669512/669512 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 45855 event pairs, 805 based on Foata normal form. 6/6620 useless extension candidates. Maximal degree in co-relation 49657. Up to 5739 conditions per place. [2024-06-14 14:04:31,363 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 600 selfloop transitions, 116 changer transitions 0/722 dead transitions. [2024-06-14 14:04:31,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 722 transitions, 13610 flow [2024-06-14 14:04:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 14:04:31,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 14:04:31,364 INFO L175 Difference]: Start difference. First operand has 616 places, 697 transitions, 12034 flow. Second operand 10 states and 215 transitions. [2024-06-14 14:04:31,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 722 transitions, 13610 flow [2024-06-14 14:04:37,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 722 transitions, 13359 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-14 14:04:37,295 INFO L231 Difference]: Finished difference. Result has 614 places, 698 transitions, 12056 flow [2024-06-14 14:04:37,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11783, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12056, PETRI_PLACES=614, PETRI_TRANSITIONS=698} [2024-06-14 14:04:37,296 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 572 predicate places. [2024-06-14 14:04:37,296 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 698 transitions, 12056 flow [2024-06-14 14:04:37,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:37,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:37,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:37,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-14 14:04:37,297 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:37,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:37,297 INFO L85 PathProgramCache]: Analyzing trace with hash 198062293, now seen corresponding path program 7 times [2024-06-14 14:04:37,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:37,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908435840] [2024-06-14 14:04:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:37,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:37,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:37,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:37,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908435840] [2024-06-14 14:04:37,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908435840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:37,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:37,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:37,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640688284] [2024-06-14 14:04:37,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:37,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:37,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:37,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:37,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:37,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 698 transitions, 12056 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:37,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:37,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:37,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:39,569 INFO L124 PetriNetUnfolderBase]: 3979/6669 cut-off events. [2024-06-14 14:04:39,570 INFO L125 PetriNetUnfolderBase]: For 705206/705214 co-relation queries the response was YES. [2024-06-14 14:04:39,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50357 conditions, 6669 events. 3979/6669 cut-off events. For 705206/705214 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 46419 event pairs, 831 based on Foata normal form. 16/6685 useless extension candidates. Maximal degree in co-relation 50102. Up to 5904 conditions per place. [2024-06-14 14:04:39,689 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 587 selfloop transitions, 126 changer transitions 0/719 dead transitions. [2024-06-14 14:04:39,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 719 transitions, 13597 flow [2024-06-14 14:04:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:04:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:04:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 14:04:39,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 14:04:39,690 INFO L175 Difference]: Start difference. First operand has 614 places, 698 transitions, 12056 flow. Second operand 9 states and 192 transitions. [2024-06-14 14:04:39,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 719 transitions, 13597 flow [2024-06-14 14:04:45,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 719 transitions, 13342 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:45,491 INFO L231 Difference]: Finished difference. Result has 615 places, 699 transitions, 12100 flow [2024-06-14 14:04:45,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11801, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12100, PETRI_PLACES=615, PETRI_TRANSITIONS=699} [2024-06-14 14:04:45,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 573 predicate places. [2024-06-14 14:04:45,491 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 699 transitions, 12100 flow [2024-06-14 14:04:45,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:45,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:45,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:45,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-14 14:04:45,492 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:45,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1723061235, now seen corresponding path program 8 times [2024-06-14 14:04:45,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:45,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855940507] [2024-06-14 14:04:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:45,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:45,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:45,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855940507] [2024-06-14 14:04:45,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855940507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:45,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:45,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:45,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829157384] [2024-06-14 14:04:45,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:45,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:45,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:45,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:45,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:45,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 699 transitions, 12100 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:45,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:45,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:45,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:47,924 INFO L124 PetriNetUnfolderBase]: 4007/6710 cut-off events. [2024-06-14 14:04:47,924 INFO L125 PetriNetUnfolderBase]: For 711177/711183 co-relation queries the response was YES. [2024-06-14 14:04:48,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50750 conditions, 6710 events. 4007/6710 cut-off events. For 711177/711183 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 46685 event pairs, 817 based on Foata normal form. 14/6724 useless extension candidates. Maximal degree in co-relation 50494. Up to 5876 conditions per place. [2024-06-14 14:04:48,046 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 587 selfloop transitions, 132 changer transitions 0/725 dead transitions. [2024-06-14 14:04:48,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 725 transitions, 13667 flow [2024-06-14 14:04:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 14:04:48,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 14:04:48,047 INFO L175 Difference]: Start difference. First operand has 615 places, 699 transitions, 12100 flow. Second operand 11 states and 231 transitions. [2024-06-14 14:04:48,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 725 transitions, 13667 flow [2024-06-14 14:04:53,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 725 transitions, 13432 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:53,346 INFO L231 Difference]: Finished difference. Result has 620 places, 700 transitions, 12188 flow [2024-06-14 14:04:53,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11865, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12188, PETRI_PLACES=620, PETRI_TRANSITIONS=700} [2024-06-14 14:04:53,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 578 predicate places. [2024-06-14 14:04:53,347 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 700 transitions, 12188 flow [2024-06-14 14:04:53,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:53,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:53,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:53,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-14 14:04:53,347 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:53,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:53,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1717698855, now seen corresponding path program 9 times [2024-06-14 14:04:53,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:53,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096743278] [2024-06-14 14:04:53,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:53,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:53,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:53,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096743278] [2024-06-14 14:04:53,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096743278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:53,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:53,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:53,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367628924] [2024-06-14 14:04:53,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:53,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:53,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:53,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:53,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 700 transitions, 12188 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:53,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:53,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:53,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:55,658 INFO L124 PetriNetUnfolderBase]: 4035/6758 cut-off events. [2024-06-14 14:04:55,658 INFO L125 PetriNetUnfolderBase]: For 722736/722742 co-relation queries the response was YES. [2024-06-14 14:04:55,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51260 conditions, 6758 events. 4035/6758 cut-off events. For 722736/722742 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 47023 event pairs, 823 based on Foata normal form. 14/6772 useless extension candidates. Maximal degree in co-relation 51003. Up to 5920 conditions per place. [2024-06-14 14:04:55,932 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 586 selfloop transitions, 132 changer transitions 0/724 dead transitions. [2024-06-14 14:04:55,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 724 transitions, 13751 flow [2024-06-14 14:04:55,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:04:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:04:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 14:04:55,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 14:04:55,933 INFO L175 Difference]: Start difference. First operand has 620 places, 700 transitions, 12188 flow. Second operand 9 states and 195 transitions. [2024-06-14 14:04:55,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 724 transitions, 13751 flow [2024-06-14 14:05:01,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 724 transitions, 13473 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:01,797 INFO L231 Difference]: Finished difference. Result has 620 places, 701 transitions, 12235 flow [2024-06-14 14:05:01,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11912, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12235, PETRI_PLACES=620, PETRI_TRANSITIONS=701} [2024-06-14 14:05:01,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 578 predicate places. [2024-06-14 14:05:01,797 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 701 transitions, 12235 flow [2024-06-14 14:05:01,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:01,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:01,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:01,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-14 14:05:01,798 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:01,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:01,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1717550613, now seen corresponding path program 5 times [2024-06-14 14:05:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:01,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875027569] [2024-06-14 14:05:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:01,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:02,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:02,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:02,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875027569] [2024-06-14 14:05:02,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875027569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:02,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:02,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:02,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017809275] [2024-06-14 14:05:02,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:02,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:02,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:02,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:02,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 701 transitions, 12235 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:02,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:02,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:04,013 INFO L124 PetriNetUnfolderBase]: 4022/6736 cut-off events. [2024-06-14 14:05:04,013 INFO L125 PetriNetUnfolderBase]: For 639784/639784 co-relation queries the response was YES. [2024-06-14 14:05:04,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50180 conditions, 6736 events. 4022/6736 cut-off events. For 639784/639784 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 46798 event pairs, 672 based on Foata normal form. 6/6741 useless extension candidates. Maximal degree in co-relation 49922. Up to 5182 conditions per place. [2024-06-14 14:05:04,138 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 588 selfloop transitions, 137 changer transitions 0/731 dead transitions. [2024-06-14 14:05:04,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 731 transitions, 13813 flow [2024-06-14 14:05:04,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:04,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:05:04,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 14:05:04,139 INFO L175 Difference]: Start difference. First operand has 620 places, 701 transitions, 12235 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:05:04,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 731 transitions, 13813 flow [2024-06-14 14:05:09,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 731 transitions, 13533 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:09,387 INFO L231 Difference]: Finished difference. Result has 620 places, 701 transitions, 12241 flow [2024-06-14 14:05:09,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11955, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12241, PETRI_PLACES=620, PETRI_TRANSITIONS=701} [2024-06-14 14:05:09,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 578 predicate places. [2024-06-14 14:05:09,388 INFO L495 AbstractCegarLoop]: Abstraction has has 620 places, 701 transitions, 12241 flow [2024-06-14 14:05:09,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:09,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:09,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:09,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-14 14:05:09,388 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:09,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:09,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1717550985, now seen corresponding path program 10 times [2024-06-14 14:05:09,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:09,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117204100] [2024-06-14 14:05:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:09,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:09,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:09,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117204100] [2024-06-14 14:05:09,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117204100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:09,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:09,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:09,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358114089] [2024-06-14 14:05:09,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:09,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:09,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:09,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:09,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 620 places, 701 transitions, 12241 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:09,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:09,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:09,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:11,745 INFO L124 PetriNetUnfolderBase]: 4067/6814 cut-off events. [2024-06-14 14:05:11,745 INFO L125 PetriNetUnfolderBase]: For 643823/643829 co-relation queries the response was YES. [2024-06-14 14:05:11,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50805 conditions, 6814 events. 4067/6814 cut-off events. For 643823/643829 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 47521 event pairs, 729 based on Foata normal form. 12/6826 useless extension candidates. Maximal degree in co-relation 50546. Up to 5607 conditions per place. [2024-06-14 14:05:11,869 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 582 selfloop transitions, 147 changer transitions 0/735 dead transitions. [2024-06-14 14:05:11,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 735 transitions, 13934 flow [2024-06-14 14:05:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:11,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 14:05:11,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 14:05:11,870 INFO L175 Difference]: Start difference. First operand has 620 places, 701 transitions, 12241 flow. Second operand 9 states and 201 transitions. [2024-06-14 14:05:11,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 735 transitions, 13934 flow [2024-06-14 14:05:17,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 735 transitions, 13556 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:17,081 INFO L231 Difference]: Finished difference. Result has 622 places, 706 transitions, 12354 flow [2024-06-14 14:05:17,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11874, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12354, PETRI_PLACES=622, PETRI_TRANSITIONS=706} [2024-06-14 14:05:17,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 580 predicate places. [2024-06-14 14:05:17,082 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 706 transitions, 12354 flow [2024-06-14 14:05:17,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:17,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:17,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:17,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-14 14:05:17,082 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:17,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:17,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1723276437, now seen corresponding path program 2 times [2024-06-14 14:05:17,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:17,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198524665] [2024-06-14 14:05:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:17,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:17,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:17,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198524665] [2024-06-14 14:05:17,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198524665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:17,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:17,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:17,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704171547] [2024-06-14 14:05:17,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:17,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:17,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:17,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:17,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:17,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:17,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 706 transitions, 12354 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:17,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:17,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:17,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:19,455 INFO L124 PetriNetUnfolderBase]: 4087/6844 cut-off events. [2024-06-14 14:05:19,455 INFO L125 PetriNetUnfolderBase]: For 636015/636021 co-relation queries the response was YES. [2024-06-14 14:05:19,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51133 conditions, 6844 events. 4087/6844 cut-off events. For 636015/636021 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 47696 event pairs, 796 based on Foata normal form. 12/6856 useless extension candidates. Maximal degree in co-relation 50873. Up to 5728 conditions per place. [2024-06-14 14:05:19,584 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 577 selfloop transitions, 152 changer transitions 0/735 dead transitions. [2024-06-14 14:05:19,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 735 transitions, 13954 flow [2024-06-14 14:05:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:19,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-14 14:05:19,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516629711751663 [2024-06-14 14:05:19,585 INFO L175 Difference]: Start difference. First operand has 622 places, 706 transitions, 12354 flow. Second operand 11 states and 233 transitions. [2024-06-14 14:05:19,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 735 transitions, 13954 flow [2024-06-14 14:05:24,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 735 transitions, 13686 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:24,661 INFO L231 Difference]: Finished difference. Result has 626 places, 707 transitions, 12434 flow [2024-06-14 14:05:24,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12086, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12434, PETRI_PLACES=626, PETRI_TRANSITIONS=707} [2024-06-14 14:05:24,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 584 predicate places. [2024-06-14 14:05:24,662 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 707 transitions, 12434 flow [2024-06-14 14:05:24,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:24,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:24,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:24,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-14 14:05:24,662 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:24,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:24,662 INFO L85 PathProgramCache]: Analyzing trace with hash 454777819, now seen corresponding path program 2 times [2024-06-14 14:05:24,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:24,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069494714] [2024-06-14 14:05:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:24,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:24,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:24,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:24,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069494714] [2024-06-14 14:05:24,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069494714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:24,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:24,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:24,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083096964] [2024-06-14 14:05:24,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:24,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:24,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:24,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:25,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:25,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 707 transitions, 12434 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:25,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:25,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:25,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:27,072 INFO L124 PetriNetUnfolderBase]: 4107/6879 cut-off events. [2024-06-14 14:05:27,072 INFO L125 PetriNetUnfolderBase]: For 634418/634420 co-relation queries the response was YES. [2024-06-14 14:05:27,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51309 conditions, 6879 events. 4107/6879 cut-off events. For 634418/634420 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 48008 event pairs, 859 based on Foata normal form. 8/6886 useless extension candidates. Maximal degree in co-relation 51049. Up to 6061 conditions per place. [2024-06-14 14:05:27,202 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 619 selfloop transitions, 101 changer transitions 0/726 dead transitions. [2024-06-14 14:05:27,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 726 transitions, 14006 flow [2024-06-14 14:05:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 14:05:27,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 14:05:27,203 INFO L175 Difference]: Start difference. First operand has 626 places, 707 transitions, 12434 flow. Second operand 7 states and 156 transitions. [2024-06-14 14:05:27,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 726 transitions, 14006 flow [2024-06-14 14:05:33,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 726 transitions, 13682 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 14:05:33,767 INFO L231 Difference]: Finished difference. Result has 623 places, 708 transitions, 12354 flow [2024-06-14 14:05:33,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12110, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12354, PETRI_PLACES=623, PETRI_TRANSITIONS=708} [2024-06-14 14:05:33,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 581 predicate places. [2024-06-14 14:05:33,767 INFO L495 AbstractCegarLoop]: Abstraction has has 623 places, 708 transitions, 12354 flow [2024-06-14 14:05:33,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:33,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:33,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:33,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-14 14:05:33,767 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:33,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:33,767 INFO L85 PathProgramCache]: Analyzing trace with hash 198277495, now seen corresponding path program 3 times [2024-06-14 14:05:33,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:33,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004551575] [2024-06-14 14:05:33,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:33,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:34,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:34,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004551575] [2024-06-14 14:05:34,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004551575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:34,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:34,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:34,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056024398] [2024-06-14 14:05:34,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:34,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:34,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:34,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:34,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:34,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:34,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 708 transitions, 12354 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:34,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:34,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:34,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:36,169 INFO L124 PetriNetUnfolderBase]: 4127/6919 cut-off events. [2024-06-14 14:05:36,169 INFO L125 PetriNetUnfolderBase]: For 625068/625076 co-relation queries the response was YES. [2024-06-14 14:05:36,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51171 conditions, 6919 events. 4127/6919 cut-off events. For 625068/625076 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 48401 event pairs, 840 based on Foata normal form. 14/6933 useless extension candidates. Maximal degree in co-relation 50911. Up to 6080 conditions per place. [2024-06-14 14:05:36,312 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 595 selfloop transitions, 132 changer transitions 0/733 dead transitions. [2024-06-14 14:05:36,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 733 transitions, 13940 flow [2024-06-14 14:05:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 14:05:36,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-14 14:05:36,313 INFO L175 Difference]: Start difference. First operand has 623 places, 708 transitions, 12354 flow. Second operand 10 states and 212 transitions. [2024-06-14 14:05:36,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 733 transitions, 13940 flow [2024-06-14 14:05:42,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 733 transitions, 13712 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:42,546 INFO L231 Difference]: Finished difference. Result has 628 places, 709 transitions, 12428 flow [2024-06-14 14:05:42,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12126, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=576, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12428, PETRI_PLACES=628, PETRI_TRANSITIONS=709} [2024-06-14 14:05:42,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 586 predicate places. [2024-06-14 14:05:42,546 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 709 transitions, 12428 flow [2024-06-14 14:05:42,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:42,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:42,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:42,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240 [2024-06-14 14:05:42,547 INFO L420 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:42,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash 463974775, now seen corresponding path program 4 times [2024-06-14 14:05:42,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:42,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254794035] [2024-06-14 14:05:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:42,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:42,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:42,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254794035] [2024-06-14 14:05:42,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254794035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:42,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:42,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:42,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020379449] [2024-06-14 14:05:42,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:42,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:42,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:42,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:42,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 709 transitions, 12428 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:42,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:42,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:42,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:45,040 INFO L124 PetriNetUnfolderBase]: 4147/6953 cut-off events. [2024-06-14 14:05:45,040 INFO L125 PetriNetUnfolderBase]: For 633280/633288 co-relation queries the response was YES. [2024-06-14 14:05:45,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51470 conditions, 6953 events. 4147/6953 cut-off events. For 633280/633288 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 48661 event pairs, 799 based on Foata normal form. 14/6967 useless extension candidates. Maximal degree in co-relation 51209. Up to 5624 conditions per place. [2024-06-14 14:05:45,187 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 572 selfloop transitions, 156 changer transitions 0/734 dead transitions. [2024-06-14 14:05:45,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 734 transitions, 14018 flow [2024-06-14 14:05:45,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:45,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 14:05:45,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 14:05:45,188 INFO L175 Difference]: Start difference. First operand has 628 places, 709 transitions, 12428 flow. Second operand 9 states and 195 transitions. [2024-06-14 14:05:45,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 734 transitions, 14018 flow [2024-06-14 14:05:51,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 734 transitions, 13732 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:51,178 INFO L231 Difference]: Finished difference. Result has 628 places, 710 transitions, 12494 flow [2024-06-14 14:05:51,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12142, PETRI_DIFFERENCE_MINUEND_PLACES=619, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=709, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12494, PETRI_PLACES=628, PETRI_TRANSITIONS=710} [2024-06-14 14:05:51,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 586 predicate places. [2024-06-14 14:05:51,178 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 710 transitions, 12494 flow [2024-06-14 14:05:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:51,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:51,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241 [2024-06-14 14:05:51,179 INFO L420 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:51,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:51,179 INFO L85 PathProgramCache]: Analyzing trace with hash 463974589, now seen corresponding path program 3 times [2024-06-14 14:05:51,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960332212] [2024-06-14 14:05:51,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:51,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:51,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:51,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:51,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960332212] [2024-06-14 14:05:51,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960332212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:51,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:51,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:51,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516826069] [2024-06-14 14:05:51,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:51,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:51,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:51,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:51,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:51,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:51,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 710 transitions, 12494 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:51,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:51,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:51,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:53,616 INFO L124 PetriNetUnfolderBase]: 4233/7089 cut-off events. [2024-06-14 14:05:53,616 INFO L125 PetriNetUnfolderBase]: For 754436/754438 co-relation queries the response was YES. [2024-06-14 14:05:53,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54600 conditions, 7089 events. 4233/7089 cut-off events. For 754436/754438 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 49652 event pairs, 806 based on Foata normal form. 8/7096 useless extension candidates. Maximal degree in co-relation 54339. Up to 5733 conditions per place. [2024-06-14 14:05:53,753 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 605 selfloop transitions, 126 changer transitions 0/737 dead transitions. [2024-06-14 14:05:53,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 737 transitions, 14774 flow [2024-06-14 14:05:53,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:53,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 14:05:53,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 14:05:53,753 INFO L175 Difference]: Start difference. First operand has 628 places, 710 transitions, 12494 flow. Second operand 7 states and 161 transitions. [2024-06-14 14:05:53,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 737 transitions, 14774 flow [2024-06-14 14:06:00,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 737 transitions, 14434 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:00,640 INFO L231 Difference]: Finished difference. Result has 627 places, 713 transitions, 12530 flow [2024-06-14 14:06:00,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12158, PETRI_DIFFERENCE_MINUEND_PLACES=620, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12530, PETRI_PLACES=627, PETRI_TRANSITIONS=713} [2024-06-14 14:06:00,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 585 predicate places. [2024-06-14 14:06:00,641 INFO L495 AbstractCegarLoop]: Abstraction has has 627 places, 713 transitions, 12530 flow [2024-06-14 14:06:00,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:00,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:00,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242 [2024-06-14 14:06:00,641 INFO L420 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:00,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:00,641 INFO L85 PathProgramCache]: Analyzing trace with hash 463854619, now seen corresponding path program 4 times [2024-06-14 14:06:00,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:00,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390525103] [2024-06-14 14:06:00,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:00,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:00,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390525103] [2024-06-14 14:06:00,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390525103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:00,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:00,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:00,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162895552] [2024-06-14 14:06:00,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:00,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:00,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:00,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:00,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 627 places, 713 transitions, 12530 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:00,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:00,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:03,149 INFO L124 PetriNetUnfolderBase]: 4220/7066 cut-off events. [2024-06-14 14:06:03,149 INFO L125 PetriNetUnfolderBase]: For 691891/691891 co-relation queries the response was YES. [2024-06-14 14:06:03,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53408 conditions, 7066 events. 4220/7066 cut-off events. For 691891/691891 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 49616 event pairs, 811 based on Foata normal form. 6/7071 useless extension candidates. Maximal degree in co-relation 53147. Up to 6384 conditions per place. [2024-06-14 14:06:03,280 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 701 selfloop transitions, 27 changer transitions 0/734 dead transitions. [2024-06-14 14:06:03,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 633 places, 734 transitions, 14108 flow [2024-06-14 14:06:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 14:06:03,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-14 14:06:03,281 INFO L175 Difference]: Start difference. First operand has 627 places, 713 transitions, 12530 flow. Second operand 7 states and 153 transitions. [2024-06-14 14:06:03,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 633 places, 734 transitions, 14108 flow [2024-06-14 14:06:10,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 734 transitions, 13951 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:10,053 INFO L231 Difference]: Finished difference. Result has 632 places, 713 transitions, 12431 flow [2024-06-14 14:06:10,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12373, PETRI_DIFFERENCE_MINUEND_PLACES=625, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12431, PETRI_PLACES=632, PETRI_TRANSITIONS=713} [2024-06-14 14:06:10,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 590 predicate places. [2024-06-14 14:06:10,054 INFO L495 AbstractCegarLoop]: Abstraction has has 632 places, 713 transitions, 12431 flow [2024-06-14 14:06:10,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:10,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:10,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:10,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243 [2024-06-14 14:06:10,054 INFO L420 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:10,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:10,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1863856599, now seen corresponding path program 5 times [2024-06-14 14:06:10,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:10,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595304833] [2024-06-14 14:06:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:10,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:10,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:10,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595304833] [2024-06-14 14:06:10,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595304833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:10,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:10,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:10,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641543470] [2024-06-14 14:06:10,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:10,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:10,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:10,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:10,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 632 places, 713 transitions, 12431 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:10,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:10,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:10,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:12,426 INFO L124 PetriNetUnfolderBase]: 4207/7039 cut-off events. [2024-06-14 14:06:12,426 INFO L125 PetriNetUnfolderBase]: For 638974/638974 co-relation queries the response was YES. [2024-06-14 14:06:12,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52221 conditions, 7039 events. 4207/7039 cut-off events. For 638974/638974 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 49194 event pairs, 850 based on Foata normal form. 6/7044 useless extension candidates. Maximal degree in co-relation 51958. Up to 6005 conditions per place. [2024-06-14 14:06:12,568 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 609 selfloop transitions, 121 changer transitions 0/736 dead transitions. [2024-06-14 14:06:12,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 736 transitions, 13999 flow [2024-06-14 14:06:12,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:12,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 14:06:12,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 14:06:12,569 INFO L175 Difference]: Start difference. First operand has 632 places, 713 transitions, 12431 flow. Second operand 9 states and 196 transitions. [2024-06-14 14:06:12,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 736 transitions, 13999 flow [2024-06-14 14:06:17,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 634 places, 736 transitions, 13875 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:17,869 INFO L231 Difference]: Finished difference. Result has 635 places, 713 transitions, 12557 flow [2024-06-14 14:06:17,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12307, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12557, PETRI_PLACES=635, PETRI_TRANSITIONS=713} [2024-06-14 14:06:17,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 593 predicate places. [2024-06-14 14:06:17,869 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 713 transitions, 12557 flow [2024-06-14 14:06:17,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:17,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:17,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244 [2024-06-14 14:06:17,869 INFO L420 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:17,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:17,869 INFO L85 PathProgramCache]: Analyzing trace with hash -373823337, now seen corresponding path program 23 times [2024-06-14 14:06:17,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:17,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647450355] [2024-06-14 14:06:17,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:17,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:18,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:18,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647450355] [2024-06-14 14:06:18,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647450355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:18,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:18,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:18,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335381079] [2024-06-14 14:06:18,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:18,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:18,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:18,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:18,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:18,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 713 transitions, 12557 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:18,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:18,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:20,380 INFO L124 PetriNetUnfolderBase]: 4235/7096 cut-off events. [2024-06-14 14:06:20,381 INFO L125 PetriNetUnfolderBase]: For 668759/668759 co-relation queries the response was YES. [2024-06-14 14:06:20,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52878 conditions, 7096 events. 4235/7096 cut-off events. For 668759/668759 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 49813 event pairs, 863 based on Foata normal form. 8/7104 useless extension candidates. Maximal degree in co-relation 52614. Up to 6300 conditions per place. [2024-06-14 14:06:20,515 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 612 selfloop transitions, 130 changer transitions 0/748 dead transitions. [2024-06-14 14:06:20,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 647 places, 748 transitions, 14203 flow [2024-06-14 14:06:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:06:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:06:20,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-14 14:06:20,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065666041275797 [2024-06-14 14:06:20,516 INFO L175 Difference]: Start difference. First operand has 635 places, 713 transitions, 12557 flow. Second operand 13 states and 270 transitions. [2024-06-14 14:06:20,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 647 places, 748 transitions, 14203 flow [2024-06-14 14:06:25,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 639 places, 748 transitions, 13893 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:25,750 INFO L231 Difference]: Finished difference. Result has 640 places, 714 transitions, 12554 flow [2024-06-14 14:06:25,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12247, PETRI_DIFFERENCE_MINUEND_PLACES=627, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=12554, PETRI_PLACES=640, PETRI_TRANSITIONS=714} [2024-06-14 14:06:25,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 598 predicate places. [2024-06-14 14:06:25,751 INFO L495 AbstractCegarLoop]: Abstraction has has 640 places, 714 transitions, 12554 flow [2024-06-14 14:06:25,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:25,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:25,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:25,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245 [2024-06-14 14:06:25,751 INFO L420 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:25,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:25,751 INFO L85 PathProgramCache]: Analyzing trace with hash -997234405, now seen corresponding path program 24 times [2024-06-14 14:06:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797468117] [2024-06-14 14:06:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:26,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:26,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797468117] [2024-06-14 14:06:26,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797468117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:26,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:26,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:26,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344189228] [2024-06-14 14:06:26,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:26,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:26,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:26,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:26,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:26,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:26,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 714 transitions, 12554 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:26,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:26,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:26,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:28,252 INFO L124 PetriNetUnfolderBase]: 4263/7140 cut-off events. [2024-06-14 14:06:28,252 INFO L125 PetriNetUnfolderBase]: For 677177/677177 co-relation queries the response was YES. [2024-06-14 14:06:28,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53212 conditions, 7140 events. 4263/7140 cut-off events. For 677177/677177 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 50206 event pairs, 867 based on Foata normal form. 8/7148 useless extension candidates. Maximal degree in co-relation 52947. Up to 6312 conditions per place. [2024-06-14 14:06:28,389 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 609 selfloop transitions, 132 changer transitions 0/747 dead transitions. [2024-06-14 14:06:28,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 650 places, 747 transitions, 14196 flow [2024-06-14 14:06:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-14 14:06:28,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-14 14:06:28,390 INFO L175 Difference]: Start difference. First operand has 640 places, 714 transitions, 12554 flow. Second operand 11 states and 235 transitions. [2024-06-14 14:06:28,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 650 places, 747 transitions, 14196 flow [2024-06-14 14:06:34,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 747 transitions, 13933 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:34,592 INFO L231 Difference]: Finished difference. Result has 642 places, 715 transitions, 12607 flow [2024-06-14 14:06:34,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12291, PETRI_DIFFERENCE_MINUEND_PLACES=631, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12607, PETRI_PLACES=642, PETRI_TRANSITIONS=715} [2024-06-14 14:06:34,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 600 predicate places. [2024-06-14 14:06:34,593 INFO L495 AbstractCegarLoop]: Abstraction has has 642 places, 715 transitions, 12607 flow [2024-06-14 14:06:34,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:34,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:34,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246 [2024-06-14 14:06:34,593 INFO L420 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:34,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash 815701595, now seen corresponding path program 25 times [2024-06-14 14:06:34,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:34,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349625762] [2024-06-14 14:06:34,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:34,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:34,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:34,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349625762] [2024-06-14 14:06:34,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349625762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:34,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:34,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:34,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403165823] [2024-06-14 14:06:34,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:34,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:34,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:34,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:34,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:35,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:35,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 642 places, 715 transitions, 12607 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:35,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:35,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:37,146 INFO L124 PetriNetUnfolderBase]: 4291/7189 cut-off events. [2024-06-14 14:06:37,146 INFO L125 PetriNetUnfolderBase]: For 689083/689085 co-relation queries the response was YES. [2024-06-14 14:06:37,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53630 conditions, 7189 events. 4291/7189 cut-off events. For 689083/689085 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 50756 event pairs, 878 based on Foata normal form. 10/7199 useless extension candidates. Maximal degree in co-relation 53364. Up to 6388 conditions per place. [2024-06-14 14:06:37,282 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 609 selfloop transitions, 127 changer transitions 0/742 dead transitions. [2024-06-14 14:06:37,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 742 transitions, 14225 flow [2024-06-14 14:06:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:37,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-14 14:06:37,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5033259423503326 [2024-06-14 14:06:37,283 INFO L175 Difference]: Start difference. First operand has 642 places, 715 transitions, 12607 flow. Second operand 11 states and 227 transitions. [2024-06-14 14:06:37,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 742 transitions, 14225 flow [2024-06-14 14:06:43,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 742 transitions, 13953 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:43,962 INFO L231 Difference]: Finished difference. Result has 644 places, 716 transitions, 12640 flow [2024-06-14 14:06:43,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12337, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12640, PETRI_PLACES=644, PETRI_TRANSITIONS=716} [2024-06-14 14:06:43,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 602 predicate places. [2024-06-14 14:06:43,963 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 716 transitions, 12640 flow [2024-06-14 14:06:43,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:43,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:43,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:43,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247 [2024-06-14 14:06:43,963 INFO L420 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:43,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:43,963 INFO L85 PathProgramCache]: Analyzing trace with hash -2019255751, now seen corresponding path program 26 times [2024-06-14 14:06:43,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:43,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013624039] [2024-06-14 14:06:43,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:43,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:44,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:44,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:44,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013624039] [2024-06-14 14:06:44,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013624039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:44,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:44,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:44,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627967781] [2024-06-14 14:06:44,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:44,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:44,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:44,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:44,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:44,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:44,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 716 transitions, 12640 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:44,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:44,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:44,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:46,641 INFO L124 PetriNetUnfolderBase]: 4319/7228 cut-off events. [2024-06-14 14:06:46,641 INFO L125 PetriNetUnfolderBase]: For 687447/687447 co-relation queries the response was YES. [2024-06-14 14:06:46,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53881 conditions, 7228 events. 4319/7228 cut-off events. For 687447/687447 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 50975 event pairs, 876 based on Foata normal form. 8/7236 useless extension candidates. Maximal degree in co-relation 53614. Up to 6600 conditions per place. [2024-06-14 14:06:46,773 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 705 selfloop transitions, 31 changer transitions 0/742 dead transitions. [2024-06-14 14:06:46,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 653 places, 742 transitions, 14256 flow [2024-06-14 14:06:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-14 14:06:46,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:06:46,774 INFO L175 Difference]: Start difference. First operand has 644 places, 716 transitions, 12640 flow. Second operand 10 states and 205 transitions. [2024-06-14 14:06:46,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 653 places, 742 transitions, 14256 flow [2024-06-14 14:06:53,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 643 places, 742 transitions, 13937 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:53,424 INFO L231 Difference]: Finished difference. Result has 644 places, 717 transitions, 12434 flow [2024-06-14 14:06:53,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12321, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12434, PETRI_PLACES=644, PETRI_TRANSITIONS=717} [2024-06-14 14:06:53,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 602 predicate places. [2024-06-14 14:06:53,424 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 717 transitions, 12434 flow [2024-06-14 14:06:53,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:53,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:53,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:53,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248 [2024-06-14 14:06:53,425 INFO L420 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:53,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1908551341, now seen corresponding path program 27 times [2024-06-14 14:06:53,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:53,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209677044] [2024-06-14 14:06:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:53,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:53,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:53,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:53,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209677044] [2024-06-14 14:06:53,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209677044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:53,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:53,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 14:06:53,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378460714] [2024-06-14 14:06:53,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:53,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 14:06:53,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:53,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 14:06:53,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 14:06:53,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:06:53,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 717 transitions, 12434 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:53,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:53,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:06:53,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:56,018 INFO L124 PetriNetUnfolderBase]: 4367/7308 cut-off events. [2024-06-14 14:06:56,018 INFO L125 PetriNetUnfolderBase]: For 694422/694422 co-relation queries the response was YES. [2024-06-14 14:06:56,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54189 conditions, 7308 events. 4367/7308 cut-off events. For 694422/694422 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 51656 event pairs, 880 based on Foata normal form. 8/7316 useless extension candidates. Maximal degree in co-relation 53921. Up to 6600 conditions per place. [2024-06-14 14:06:56,159 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 710 selfloop transitions, 33 changer transitions 0/749 dead transitions. [2024-06-14 14:06:56,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 749 transitions, 14124 flow [2024-06-14 14:06:56,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:56,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-14 14:06:56,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-14 14:06:56,160 INFO L175 Difference]: Start difference. First operand has 644 places, 717 transitions, 12434 flow. Second operand 11 states and 225 transitions. [2024-06-14 14:06:56,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 749 transitions, 14124 flow