./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe004_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe004_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:34:50,475 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:34:50,540 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:34:50,546 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:34:50,546 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:34:50,568 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:34:50,569 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:34:50,569 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:34:50,570 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:34:50,576 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:34:50,576 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:34:50,577 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:34:50,578 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:34:50,579 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:34:50,579 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:34:50,580 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:34:50,580 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:34:50,580 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:34:50,580 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:34:50,580 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:34:50,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:34:50,581 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:34:50,581 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:34:50,581 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:34:50,582 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:34:50,582 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:34:50,582 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:34:50,582 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:34:50,583 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:34:50,583 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:34:50,584 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:34:50,584 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:34:50,584 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:34:50,584 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:34:50,584 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:34:50,584 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:34:50,585 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:34:50,585 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:34:50,585 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:34:50,585 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:34:50,585 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:34:50,586 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:34:50,586 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:34:50,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:34:50,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:34:50,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:34:50,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:34:50,872 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:34:50,873 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:34:50,874 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe004_tso.yml/witness.yml [2024-05-12 10:34:50,963 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:34:50,967 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:34:50,968 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-05-12 10:34:52,099 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:34:52,319 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:34:52,321 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i [2024-05-12 10:34:52,337 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c11114a/99ba75397bee48dd8af06f90aafaead5/FLAGe32955d0d [2024-05-12 10:34:52,351 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c11114a/99ba75397bee48dd8af06f90aafaead5 [2024-05-12 10:34:52,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:34:52,353 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:34:52,355 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:34:52,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:34:52,358 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:34:52,359 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:34:50" (1/2) ... [2024-05-12 10:34:52,360 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141ed541 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:52, skipping insertion in model container [2024-05-12 10:34:52,360 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:34:50" (1/2) ... [2024-05-12 10:34:52,361 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1b1f0210 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:34:52, skipping insertion in model container [2024-05-12 10:34:52,361 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:34:52" (2/2) ... [2024-05-12 10:34:52,362 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141ed541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52, skipping insertion in model container [2024-05-12 10:34:52,362 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:34:52" (2/2) ... [2024-05-12 10:34:52,362 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:34:52,410 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:34:52,411 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-05-12 10:34:52,411 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-05-12 10:34:52,411 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && y <= 2) && y <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-05-12 10:34:52,412 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:34:52,412 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-05-12 10:34:52,446 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:34:52,618 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i[945,958] [2024-05-12 10:34:52,771 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:34:52,778 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:34:52,813 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_tso.i[945,958] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:34:52,902 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:34:52,928 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:34:52,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52 WrapperNode [2024-05-12 10:34:52,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:34:52,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:34:52,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:34:52,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:34:52,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:52,963 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:52,991 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2024-05-12 10:34:52,997 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:34:52,997 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:34:52,998 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:34:52,998 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:34:53,006 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:53,007 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:53,025 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:53,043 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 10:34:53,044 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:53,044 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:53,061 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:53,063 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:53,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:53,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:53,069 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:34:53,069 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:34:53,069 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:34:53,070 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:34:53,070 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (1/1) ... [2024-05-12 10:34:53,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:34:53,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:34:53,159 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) [2024-05-12 10:34:53,245 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 [2024-05-12 10:34:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:34:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:34:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:34:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:34:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:34:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:34:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:34:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:34:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:34:53,259 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:34:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:34:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:34:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 10:34:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 10:34:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:34:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:34:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:34:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:34:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:34:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:34:53,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:34:53,262 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:34:53,355 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:34:53,356 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:34:53,619 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:34:53,619 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:34:53,701 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:34:53,701 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:34:53,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:34:53 BoogieIcfgContainer [2024-05-12 10:34:53,703 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:34:53,705 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:34:53,705 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:34:53,708 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:34:53,708 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:34:50" (1/4) ... [2024-05-12 10:34:53,709 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344fc9a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:34:53, skipping insertion in model container [2024-05-12 10:34:53,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:34:52" (2/4) ... [2024-05-12 10:34:53,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344fc9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:34:53, skipping insertion in model container [2024-05-12 10:34:53,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:34:52" (3/4) ... [2024-05-12 10:34:53,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@344fc9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:34:53, skipping insertion in model container [2024-05-12 10:34:53,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:34:53" (4/4) ... [2024-05-12 10:34:53,711 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_tso.i [2024-05-12 10:34:53,725 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:34:53,725 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 10:34:53,725 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:34:53,763 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:34:53,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 10:34:53,834 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-05-12 10:34:53,835 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:34:53,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-05-12 10:34:53,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 10:34:53,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-05-12 10:34:53,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:34:53,863 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;@44870601, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:34:53,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 10:34:53,867 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:34:53,868 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-05-12 10:34:53,868 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:34:53,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:53,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:34:53,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:53,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:53,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1758069558, now seen corresponding path program 1 times [2024-05-12 10:34:53,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:53,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534355470] [2024-05-12 10:34:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:53,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:54,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:54,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534355470] [2024-05-12 10:34:54,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534355470] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:54,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:54,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:34:54,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980514651] [2024-05-12 10:34:54,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:54,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:34:54,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:34:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:34:54,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 10:34:54,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:54,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:54,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 10:34:54,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:54,835 INFO L124 PetriNetUnfolderBase]: 946/1501 cut-off events. [2024-05-12 10:34:54,836 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-05-12 10:34:54,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3009 conditions, 1501 events. 946/1501 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 8080 event pairs, 544 based on Foata normal form. 1/1445 useless extension candidates. Maximal degree in co-relation 2994. Up to 1429 conditions per place. [2024-05-12 10:34:54,849 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 34 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-05-12 10:34:54,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 195 flow [2024-05-12 10:34:54,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:34:54,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:34:54,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-05-12 10:34:54,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6884057971014492 [2024-05-12 10:34:54,860 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 95 transitions. [2024-05-12 10:34:54,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 195 flow [2024-05-12 10:34:54,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 190 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:34:54,869 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-05-12 10:34:54,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-05-12 10:34:54,873 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-05-12 10:34:54,873 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-05-12 10:34:54,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:54,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:54,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:54,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:34:54,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:54,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1582675031, now seen corresponding path program 1 times [2024-05-12 10:34:54,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:54,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367156150] [2024-05-12 10:34:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:54,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:55,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:55,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367156150] [2024-05-12 10:34:55,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367156150] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:55,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:55,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:34:55,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659817911] [2024-05-12 10:34:55,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:55,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:34:55,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:55,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:34:55,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:34:55,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:55,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:55,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:55,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:55,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:55,372 INFO L124 PetriNetUnfolderBase]: 1534/2420 cut-off events. [2024-05-12 10:34:55,372 INFO L125 PetriNetUnfolderBase]: For 434/477 co-relation queries the response was YES. [2024-05-12 10:34:55,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 2420 events. 1534/2420 cut-off events. For 434/477 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13658 event pairs, 814 based on Foata normal form. 3/2371 useless extension candidates. Maximal degree in co-relation 5337. Up to 2243 conditions per place. [2024-05-12 10:34:55,386 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 48 selfloop transitions, 7 changer transitions 0/67 dead transitions. [2024-05-12 10:34:55,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 67 transitions, 290 flow [2024-05-12 10:34:55,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:34:55,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:34:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-05-12 10:34:55,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6467391304347826 [2024-05-12 10:34:55,388 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 119 transitions. [2024-05-12 10:34:55,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 67 transitions, 290 flow [2024-05-12 10:34:55,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 67 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:34:55,390 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 168 flow [2024-05-12 10:34:55,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2024-05-12 10:34:55,391 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2024-05-12 10:34:55,391 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 168 flow [2024-05-12 10:34:55,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:55,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:55,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:55,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:34:55,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:55,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1818284929, now seen corresponding path program 1 times [2024-05-12 10:34:55,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:55,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427495538] [2024-05-12 10:34:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:55,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:55,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:55,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427495538] [2024-05-12 10:34:55,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427495538] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:55,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:55,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:34:55,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133050651] [2024-05-12 10:34:55,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:55,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:34:55,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:34:55,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:34:55,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:55,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:55,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:55,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:55,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:55,842 INFO L124 PetriNetUnfolderBase]: 1590/2552 cut-off events. [2024-05-12 10:34:55,843 INFO L125 PetriNetUnfolderBase]: For 1147/1147 co-relation queries the response was YES. [2024-05-12 10:34:55,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6168 conditions, 2552 events. 1590/2552 cut-off events. For 1147/1147 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14427 event pairs, 448 based on Foata normal form. 7/2546 useless extension candidates. Maximal degree in co-relation 6150. Up to 2134 conditions per place. [2024-05-12 10:34:55,856 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 65 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-05-12 10:34:55,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 96 transitions, 474 flow [2024-05-12 10:34:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:34:55,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:34:55,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-05-12 10:34:55,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6956521739130435 [2024-05-12 10:34:55,858 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 168 flow. Second operand 5 states and 160 transitions. [2024-05-12 10:34:55,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 96 transitions, 474 flow [2024-05-12 10:34:55,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 96 transitions, 472 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-05-12 10:34:55,861 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 294 flow [2024-05-12 10:34:55,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-05-12 10:34:55,862 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-05-12 10:34:55,862 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 294 flow [2024-05-12 10:34:55,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:55,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:55,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:55,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:34:55,863 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:55,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:55,863 INFO L85 PathProgramCache]: Analyzing trace with hash 679898558, now seen corresponding path program 1 times [2024-05-12 10:34:55,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:55,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559312707] [2024-05-12 10:34:55,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:55,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:56,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:56,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559312707] [2024-05-12 10:34:56,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559312707] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:56,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:56,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:56,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259450974] [2024-05-12 10:34:56,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:56,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:56,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:56,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:56,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:56,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:56,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 294 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:56,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:56,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:56,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:56,420 INFO L124 PetriNetUnfolderBase]: 1718/2772 cut-off events. [2024-05-12 10:34:56,421 INFO L125 PetriNetUnfolderBase]: For 3282/3282 co-relation queries the response was YES. [2024-05-12 10:34:56,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8291 conditions, 2772 events. 1718/2772 cut-off events. For 3282/3282 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16053 event pairs, 281 based on Foata normal form. 26/2785 useless extension candidates. Maximal degree in co-relation 8268. Up to 2122 conditions per place. [2024-05-12 10:34:56,445 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 74 selfloop transitions, 22 changer transitions 0/108 dead transitions. [2024-05-12 10:34:56,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 108 transitions, 634 flow [2024-05-12 10:34:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:34:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:34:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-05-12 10:34:56,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6811594202898551 [2024-05-12 10:34:56,449 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 294 flow. Second operand 6 states and 188 transitions. [2024-05-12 10:34:56,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 108 transitions, 634 flow [2024-05-12 10:34:56,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 108 transitions, 624 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-05-12 10:34:56,460 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 355 flow [2024-05-12 10:34:56,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-05-12 10:34:56,461 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-05-12 10:34:56,461 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 355 flow [2024-05-12 10:34:56,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:56,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:56,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:56,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:34:56,462 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:56,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:56,463 INFO L85 PathProgramCache]: Analyzing trace with hash 238577921, now seen corresponding path program 1 times [2024-05-12 10:34:56,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:56,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503211808] [2024-05-12 10:34:56,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:56,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:56,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:56,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503211808] [2024-05-12 10:34:56,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503211808] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:56,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:56,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-05-12 10:34:56,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206327638] [2024-05-12 10:34:56,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:56,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:34:56,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:56,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:34:56,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:34:56,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 46 [2024-05-12 10:34:56,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 355 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:56,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:56,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 46 [2024-05-12 10:34:56,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:56,950 INFO L124 PetriNetUnfolderBase]: 1260/2259 cut-off events. [2024-05-12 10:34:56,950 INFO L125 PetriNetUnfolderBase]: For 3793/3831 co-relation queries the response was YES. [2024-05-12 10:34:56,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7080 conditions, 2259 events. 1260/2259 cut-off events. For 3793/3831 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14077 event pairs, 479 based on Foata normal form. 6/2193 useless extension candidates. Maximal degree in co-relation 7054. Up to 1824 conditions per place. [2024-05-12 10:34:56,968 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 54 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-05-12 10:34:56,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 84 transitions, 547 flow [2024-05-12 10:34:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:34:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:34:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-05-12 10:34:56,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:34:56,970 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 355 flow. Second operand 4 states and 120 transitions. [2024-05-12 10:34:56,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 84 transitions, 547 flow [2024-05-12 10:34:56,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 496 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:34:56,976 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 370 flow [2024-05-12 10:34:56,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-05-12 10:34:56,977 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 16 predicate places. [2024-05-12 10:34:56,977 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 370 flow [2024-05-12 10:34:56,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:56,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:56,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:56,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:34:56,978 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:56,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:56,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1213420129, now seen corresponding path program 1 times [2024-05-12 10:34:56,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:56,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419369054] [2024-05-12 10:34:56,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:56,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:57,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:57,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419369054] [2024-05-12 10:34:57,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419369054] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:57,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:57,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:34:57,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800046561] [2024-05-12 10:34:57,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:57,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:34:57,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:57,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:34:57,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:34:57,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:57,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 370 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:57,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:57,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:57,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:57,569 INFO L124 PetriNetUnfolderBase]: 1720/2788 cut-off events. [2024-05-12 10:34:57,569 INFO L125 PetriNetUnfolderBase]: For 5503/5509 co-relation queries the response was YES. [2024-05-12 10:34:57,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9183 conditions, 2788 events. 1720/2788 cut-off events. For 5503/5509 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16295 event pairs, 441 based on Foata normal form. 7/2784 useless extension candidates. Maximal degree in co-relation 9156. Up to 2357 conditions per place. [2024-05-12 10:34:57,586 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 64 selfloop transitions, 24 changer transitions 0/100 dead transitions. [2024-05-12 10:34:57,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 100 transitions, 685 flow [2024-05-12 10:34:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:34:57,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:34:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-05-12 10:34:57,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6608695652173913 [2024-05-12 10:34:57,587 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 370 flow. Second operand 5 states and 152 transitions. [2024-05-12 10:34:57,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 100 transitions, 685 flow [2024-05-12 10:34:57,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 100 transitions, 652 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 10:34:57,593 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 452 flow [2024-05-12 10:34:57,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-05-12 10:34:57,596 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 20 predicate places. [2024-05-12 10:34:57,596 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 452 flow [2024-05-12 10:34:57,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:57,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:57,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:57,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:34:57,597 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:57,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:57,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1793251842, now seen corresponding path program 1 times [2024-05-12 10:34:57,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:57,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502982177] [2024-05-12 10:34:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:57,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:57,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:57,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:57,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502982177] [2024-05-12 10:34:57,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502982177] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:57,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:57,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:34:57,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687051876] [2024-05-12 10:34:57,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:57,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:34:57,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:57,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:34:57,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:34:57,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:57,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 452 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:57,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:57,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:57,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:58,205 INFO L124 PetriNetUnfolderBase]: 1729/2938 cut-off events. [2024-05-12 10:34:58,205 INFO L125 PetriNetUnfolderBase]: For 6754/6756 co-relation queries the response was YES. [2024-05-12 10:34:58,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9907 conditions, 2938 events. 1729/2938 cut-off events. For 6754/6756 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17545 event pairs, 535 based on Foata normal form. 4/2930 useless extension candidates. Maximal degree in co-relation 9878. Up to 2353 conditions per place. [2024-05-12 10:34:58,224 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 68 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-05-12 10:34:58,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 106 transitions, 785 flow [2024-05-12 10:34:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:34:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:34:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-05-12 10:34:58,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6695652173913044 [2024-05-12 10:34:58,226 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 452 flow. Second operand 5 states and 154 transitions. [2024-05-12 10:34:58,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 106 transitions, 785 flow [2024-05-12 10:34:58,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 106 transitions, 752 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-05-12 10:34:58,234 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 514 flow [2024-05-12 10:34:58,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=514, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-05-12 10:34:58,235 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 24 predicate places. [2024-05-12 10:34:58,235 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 514 flow [2024-05-12 10:34:58,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:58,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:58,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:58,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:34:58,236 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:58,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:58,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1640155552, now seen corresponding path program 2 times [2024-05-12 10:34:58,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:58,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815565947] [2024-05-12 10:34:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:58,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:58,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:58,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815565947] [2024-05-12 10:34:58,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815565947] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:58,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:58,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:34:58,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992178947] [2024-05-12 10:34:58,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:58,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:34:58,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:58,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:34:58,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:34:58,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:58,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 514 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:58,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:58,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:58,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:58,782 INFO L124 PetriNetUnfolderBase]: 1694/2842 cut-off events. [2024-05-12 10:34:58,783 INFO L125 PetriNetUnfolderBase]: For 8100/8106 co-relation queries the response was YES. [2024-05-12 10:34:58,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9780 conditions, 2842 events. 1694/2842 cut-off events. For 8100/8106 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17148 event pairs, 689 based on Foata normal form. 5/2812 useless extension candidates. Maximal degree in co-relation 9749. Up to 2302 conditions per place. [2024-05-12 10:34:58,799 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 63 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-05-12 10:34:58,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 101 transitions, 774 flow [2024-05-12 10:34:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:34:58,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:34:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-05-12 10:34:58,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-05-12 10:34:58,800 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 514 flow. Second operand 5 states and 149 transitions. [2024-05-12 10:34:58,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 101 transitions, 774 flow [2024-05-12 10:34:58,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 738 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 10:34:58,807 INFO L231 Difference]: Finished difference. Result has 77 places, 78 transitions, 540 flow [2024-05-12 10:34:58,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=540, PETRI_PLACES=77, PETRI_TRANSITIONS=78} [2024-05-12 10:34:58,808 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2024-05-12 10:34:58,808 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 78 transitions, 540 flow [2024-05-12 10:34:58,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:58,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:58,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:58,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:34:58,809 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:58,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:58,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2134409630, now seen corresponding path program 1 times [2024-05-12 10:34:58,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:58,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423622502] [2024-05-12 10:34:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:58,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:59,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:59,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423622502] [2024-05-12 10:34:59,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423622502] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:59,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:59,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:59,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572178770] [2024-05-12 10:34:59,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:59,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:59,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:59,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:59,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:59,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:59,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 78 transitions, 540 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:59,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:59,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:59,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:34:59,404 INFO L124 PetriNetUnfolderBase]: 1807/2920 cut-off events. [2024-05-12 10:34:59,404 INFO L125 PetriNetUnfolderBase]: For 9891/9897 co-relation queries the response was YES. [2024-05-12 10:34:59,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10343 conditions, 2920 events. 1807/2920 cut-off events. For 9891/9897 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17062 event pairs, 528 based on Foata normal form. 25/2928 useless extension candidates. Maximal degree in co-relation 10311. Up to 2297 conditions per place. [2024-05-12 10:34:59,421 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 72 selfloop transitions, 30 changer transitions 0/114 dead transitions. [2024-05-12 10:34:59,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 114 transitions, 878 flow [2024-05-12 10:34:59,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:34:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:34:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 10:34:59,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-05-12 10:34:59,423 INFO L175 Difference]: Start difference. First operand has 77 places, 78 transitions, 540 flow. Second operand 6 states and 179 transitions. [2024-05-12 10:34:59,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 114 transitions, 878 flow [2024-05-12 10:34:59,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 816 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 10:34:59,434 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 575 flow [2024-05-12 10:34:59,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-05-12 10:34:59,435 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2024-05-12 10:34:59,435 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 575 flow [2024-05-12 10:34:59,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:59,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:34:59,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:34:59,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:34:59,437 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:34:59,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:34:59,438 INFO L85 PathProgramCache]: Analyzing trace with hash -431121768, now seen corresponding path program 1 times [2024-05-12 10:34:59,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:34:59,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088066887] [2024-05-12 10:34:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:34:59,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:34:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:34:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:34:59,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:34:59,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088066887] [2024-05-12 10:34:59,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088066887] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:34:59,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:34:59,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:34:59,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515446870] [2024-05-12 10:34:59,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:34:59,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:34:59,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:34:59,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:34:59,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:34:59,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:34:59,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 575 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:34:59,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:34:59,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:34:59,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:00,104 INFO L124 PetriNetUnfolderBase]: 1824/2923 cut-off events. [2024-05-12 10:35:00,104 INFO L125 PetriNetUnfolderBase]: For 10631/10633 co-relation queries the response was YES. [2024-05-12 10:35:00,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10943 conditions, 2923 events. 1824/2923 cut-off events. For 10631/10633 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17008 event pairs, 463 based on Foata normal form. 2/2912 useless extension candidates. Maximal degree in co-relation 10910. Up to 2499 conditions per place. [2024-05-12 10:35:00,122 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 82 selfloop transitions, 31 changer transitions 0/125 dead transitions. [2024-05-12 10:35:00,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 961 flow [2024-05-12 10:35:00,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:00,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:00,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-05-12 10:35:00,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.639751552795031 [2024-05-12 10:35:00,123 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 575 flow. Second operand 7 states and 206 transitions. [2024-05-12 10:35:00,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 961 flow [2024-05-12 10:35:00,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 125 transitions, 886 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:00,136 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 596 flow [2024-05-12 10:35:00,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=596, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-05-12 10:35:00,137 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 32 predicate places. [2024-05-12 10:35:00,137 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 596 flow [2024-05-12 10:35:00,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:00,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:00,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:00,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:35:00,138 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:00,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash -917247818, now seen corresponding path program 2 times [2024-05-12 10:35:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:00,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102245253] [2024-05-12 10:35:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:00,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:00,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:00,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:00,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:00,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102245253] [2024-05-12 10:35:00,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102245253] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:00,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:00,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:35:00,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121213284] [2024-05-12 10:35:00,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:00,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:35:00,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:00,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:35:00,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:35:00,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:00,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 596 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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) [2024-05-12 10:35:00,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:00,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:00,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:00,695 INFO L124 PetriNetUnfolderBase]: 1819/3071 cut-off events. [2024-05-12 10:35:00,695 INFO L125 PetriNetUnfolderBase]: For 12008/12016 co-relation queries the response was YES. [2024-05-12 10:35:00,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11022 conditions, 3071 events. 1819/3071 cut-off events. For 12008/12016 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18856 event pairs, 733 based on Foata normal form. 5/3042 useless extension candidates. Maximal degree in co-relation 10988. Up to 2494 conditions per place. [2024-05-12 10:35:00,712 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 67 selfloop transitions, 26 changer transitions 0/105 dead transitions. [2024-05-12 10:35:00,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 105 transitions, 832 flow [2024-05-12 10:35:00,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:00,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2024-05-12 10:35:00,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:35:00,714 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 596 flow. Second operand 5 states and 145 transitions. [2024-05-12 10:35:00,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 105 transitions, 832 flow [2024-05-12 10:35:00,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 744 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:00,724 INFO L231 Difference]: Finished difference. Result has 81 places, 84 transitions, 568 flow [2024-05-12 10:35:00,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=76, 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=5, PETRI_FLOW=568, PETRI_PLACES=81, PETRI_TRANSITIONS=84} [2024-05-12 10:35:00,724 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2024-05-12 10:35:00,725 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 84 transitions, 568 flow [2024-05-12 10:35:00,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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) [2024-05-12 10:35:00,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:00,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:00,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:35:00,725 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:00,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:00,726 INFO L85 PathProgramCache]: Analyzing trace with hash -363272571, now seen corresponding path program 1 times [2024-05-12 10:35:00,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:00,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86606455] [2024-05-12 10:35:00,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:00,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:00,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:00,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:00,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86606455] [2024-05-12 10:35:00,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86606455] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:00,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:00,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:00,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100716458] [2024-05-12 10:35:00,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:00,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:00,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:00,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:00,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:00,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 84 transitions, 568 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:00,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:00,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:00,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:01,290 INFO L124 PetriNetUnfolderBase]: 1968/3249 cut-off events. [2024-05-12 10:35:01,290 INFO L125 PetriNetUnfolderBase]: For 13828/13830 co-relation queries the response was YES. [2024-05-12 10:35:01,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11949 conditions, 3249 events. 1968/3249 cut-off events. For 13828/13830 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19686 event pairs, 405 based on Foata normal form. 4/3238 useless extension candidates. Maximal degree in co-relation 11916. Up to 2307 conditions per place. [2024-05-12 10:35:01,311 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 81 selfloop transitions, 33 changer transitions 0/126 dead transitions. [2024-05-12 10:35:01,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 126 transitions, 976 flow [2024-05-12 10:35:01,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-05-12 10:35:01,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6557971014492754 [2024-05-12 10:35:01,312 INFO L175 Difference]: Start difference. First operand has 81 places, 84 transitions, 568 flow. Second operand 6 states and 181 transitions. [2024-05-12 10:35:01,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 126 transitions, 976 flow [2024-05-12 10:35:01,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 126 transitions, 924 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:01,327 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 629 flow [2024-05-12 10:35:01,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=516, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=629, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-05-12 10:35:01,328 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2024-05-12 10:35:01,328 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 629 flow [2024-05-12 10:35:01,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:01,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:01,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:01,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:35:01,329 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:01,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:01,329 INFO L85 PathProgramCache]: Analyzing trace with hash -774755545, now seen corresponding path program 2 times [2024-05-12 10:35:01,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:01,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407701358] [2024-05-12 10:35:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:01,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:01,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:01,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407701358] [2024-05-12 10:35:01,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407701358] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:01,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:01,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:01,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570764890] [2024-05-12 10:35:01,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:01,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:01,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:01,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:01,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:01,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:01,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 629 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:01,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:01,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:01,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:01,910 INFO L124 PetriNetUnfolderBase]: 1960/3300 cut-off events. [2024-05-12 10:35:01,910 INFO L125 PetriNetUnfolderBase]: For 16132/16134 co-relation queries the response was YES. [2024-05-12 10:35:01,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12380 conditions, 3300 events. 1960/3300 cut-off events. For 16132/16134 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 20460 event pairs, 733 based on Foata normal form. 4/3261 useless extension candidates. Maximal degree in co-relation 12346. Up to 2691 conditions per place. [2024-05-12 10:35:01,932 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 77 selfloop transitions, 31 changer transitions 0/120 dead transitions. [2024-05-12 10:35:01,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 120 transitions, 929 flow [2024-05-12 10:35:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 10:35:01,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 10:35:01,934 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 629 flow. Second operand 6 states and 175 transitions. [2024-05-12 10:35:01,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 120 transitions, 929 flow [2024-05-12 10:35:01,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 120 transitions, 883 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:01,954 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 664 flow [2024-05-12 10:35:01,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=664, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2024-05-12 10:35:01,954 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 37 predicate places. [2024-05-12 10:35:01,955 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 664 flow [2024-05-12 10:35:01,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:01,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:01,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:01,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:35:01,955 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:01,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:01,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1180780192, now seen corresponding path program 1 times [2024-05-12 10:35:01,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:01,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135624369] [2024-05-12 10:35:01,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:01,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:02,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:02,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135624369] [2024-05-12 10:35:02,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135624369] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:02,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:02,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:35:02,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240627252] [2024-05-12 10:35:02,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:02,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:35:02,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:02,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:35:02,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:35:02,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:02,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 664 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:02,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:02,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:02,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:02,598 INFO L124 PetriNetUnfolderBase]: 1971/3188 cut-off events. [2024-05-12 10:35:02,599 INFO L125 PetriNetUnfolderBase]: For 16984/16984 co-relation queries the response was YES. [2024-05-12 10:35:02,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12635 conditions, 3188 events. 1971/3188 cut-off events. For 16984/16984 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18968 event pairs, 532 based on Foata normal form. 1/3182 useless extension candidates. Maximal degree in co-relation 12599. Up to 2899 conditions per place. [2024-05-12 10:35:02,619 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 93 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2024-05-12 10:35:02,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 120 transitions, 1018 flow [2024-05-12 10:35:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-05-12 10:35:02,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-05-12 10:35:02,621 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 664 flow. Second operand 5 states and 141 transitions. [2024-05-12 10:35:02,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 120 transitions, 1018 flow [2024-05-12 10:35:02,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 120 transitions, 945 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:02,640 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 703 flow [2024-05-12 10:35:02,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=703, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-05-12 10:35:02,641 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 39 predicate places. [2024-05-12 10:35:02,641 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 703 flow [2024-05-12 10:35:02,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:02,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:02,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:02,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:35:02,641 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:02,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:02,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1835243779, now seen corresponding path program 1 times [2024-05-12 10:35:02,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:02,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779356217] [2024-05-12 10:35:02,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:02,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:02,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779356217] [2024-05-12 10:35:02,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779356217] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:02,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:02,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:02,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197185007] [2024-05-12 10:35:02,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:02,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:02,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:02,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:02,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:02,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 703 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:02,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:02,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:02,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:03,219 INFO L124 PetriNetUnfolderBase]: 1963/3164 cut-off events. [2024-05-12 10:35:03,219 INFO L125 PetriNetUnfolderBase]: For 19096/19105 co-relation queries the response was YES. [2024-05-12 10:35:03,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12758 conditions, 3164 events. 1963/3164 cut-off events. For 19096/19105 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18679 event pairs, 473 based on Foata normal form. 6/3157 useless extension candidates. Maximal degree in co-relation 12720. Up to 2694 conditions per place. [2024-05-12 10:35:03,239 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 85 selfloop transitions, 31 changer transitions 0/128 dead transitions. [2024-05-12 10:35:03,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 128 transitions, 1025 flow [2024-05-12 10:35:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:03,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:03,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 10:35:03,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 10:35:03,241 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 703 flow. Second operand 6 states and 172 transitions. [2024-05-12 10:35:03,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 128 transitions, 1025 flow [2024-05-12 10:35:03,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 1005 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-05-12 10:35:03,262 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 780 flow [2024-05-12 10:35:03,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=780, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-05-12 10:35:03,263 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-05-12 10:35:03,263 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 780 flow [2024-05-12 10:35:03,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:03,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:03,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:03,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:35:03,264 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:03,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:03,265 INFO L85 PathProgramCache]: Analyzing trace with hash 927177671, now seen corresponding path program 2 times [2024-05-12 10:35:03,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:03,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527304914] [2024-05-12 10:35:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:03,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:03,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:03,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527304914] [2024-05-12 10:35:03,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527304914] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:03,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:03,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:03,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295447881] [2024-05-12 10:35:03,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:03,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:03,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:03,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:03,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 780 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:03,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:03,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:03,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:03,876 INFO L124 PetriNetUnfolderBase]: 2042/3413 cut-off events. [2024-05-12 10:35:03,876 INFO L125 PetriNetUnfolderBase]: For 23511/23520 co-relation queries the response was YES. [2024-05-12 10:35:03,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13879 conditions, 3413 events. 2042/3413 cut-off events. For 23511/23520 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21132 event pairs, 626 based on Foata normal form. 6/3380 useless extension candidates. Maximal degree in co-relation 13838. Up to 2455 conditions per place. [2024-05-12 10:35:03,902 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 90 selfloop transitions, 35 changer transitions 0/137 dead transitions. [2024-05-12 10:35:03,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 137 transitions, 1204 flow [2024-05-12 10:35:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:03,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-05-12 10:35:03,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644927536231884 [2024-05-12 10:35:03,904 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 780 flow. Second operand 6 states and 178 transitions. [2024-05-12 10:35:03,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 137 transitions, 1204 flow [2024-05-12 10:35:03,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 137 transitions, 1127 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:03,931 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 818 flow [2024-05-12 10:35:03,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=818, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-05-12 10:35:03,932 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 47 predicate places. [2024-05-12 10:35:03,932 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 818 flow [2024-05-12 10:35:03,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:03,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:03,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:03,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:35:03,933 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:03,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:03,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1931029858, now seen corresponding path program 2 times [2024-05-12 10:35:03,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:03,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621954086] [2024-05-12 10:35:03,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:03,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:04,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:04,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:04,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621954086] [2024-05-12 10:35:04,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621954086] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:04,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:04,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:35:04,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658545738] [2024-05-12 10:35:04,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:04,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:35:04,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:35:04,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:35:04,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:04,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 818 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:04,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:04,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:04,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:04,547 INFO L124 PetriNetUnfolderBase]: 2050/3316 cut-off events. [2024-05-12 10:35:04,547 INFO L125 PetriNetUnfolderBase]: For 25088/25088 co-relation queries the response was YES. [2024-05-12 10:35:04,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14136 conditions, 3316 events. 2050/3316 cut-off events. For 25088/25088 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19830 event pairs, 478 based on Foata normal form. 2/3314 useless extension candidates. Maximal degree in co-relation 14094. Up to 3021 conditions per place. [2024-05-12 10:35:04,570 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 95 selfloop transitions, 17 changer transitions 0/124 dead transitions. [2024-05-12 10:35:04,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 124 transitions, 1120 flow [2024-05-12 10:35:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:35:04,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:35:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-05-12 10:35:04,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:35:04,571 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 818 flow. Second operand 4 states and 120 transitions. [2024-05-12 10:35:04,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 124 transitions, 1120 flow [2024-05-12 10:35:04,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 124 transitions, 1058 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:04,598 INFO L231 Difference]: Finished difference. Result has 99 places, 106 transitions, 844 flow [2024-05-12 10:35:04,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=844, PETRI_PLACES=99, PETRI_TRANSITIONS=106} [2024-05-12 10:35:04,599 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 49 predicate places. [2024-05-12 10:35:04,599 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 106 transitions, 844 flow [2024-05-12 10:35:04,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:04,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:04,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:04,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:35:04,600 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:04,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:04,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1611605061, now seen corresponding path program 1 times [2024-05-12 10:35:04,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:04,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694182346] [2024-05-12 10:35:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:04,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:04,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:04,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:04,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694182346] [2024-05-12 10:35:04,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694182346] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:04,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:04,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:04,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147279321] [2024-05-12 10:35:04,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:04,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:04,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:04,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:04,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:04,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:04,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 106 transitions, 844 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:04,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:04,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:04,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:05,362 INFO L124 PetriNetUnfolderBase]: 2117/3533 cut-off events. [2024-05-12 10:35:05,362 INFO L125 PetriNetUnfolderBase]: For 30062/30076 co-relation queries the response was YES. [2024-05-12 10:35:05,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14962 conditions, 3533 events. 2117/3533 cut-off events. For 30062/30076 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 22053 event pairs, 535 based on Foata normal form. 15/3507 useless extension candidates. Maximal degree in co-relation 14918. Up to 1898 conditions per place. [2024-05-12 10:35:05,386 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 96 selfloop transitions, 32 changer transitions 0/140 dead transitions. [2024-05-12 10:35:05,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 140 transitions, 1226 flow [2024-05-12 10:35:05,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:05,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 10:35:05,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 10:35:05,388 INFO L175 Difference]: Start difference. First operand has 99 places, 106 transitions, 844 flow. Second operand 6 states and 172 transitions. [2024-05-12 10:35:05,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 140 transitions, 1226 flow [2024-05-12 10:35:05,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 140 transitions, 1186 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:05,418 INFO L231 Difference]: Finished difference. Result has 103 places, 107 transitions, 886 flow [2024-05-12 10:35:05,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=886, PETRI_PLACES=103, PETRI_TRANSITIONS=107} [2024-05-12 10:35:05,419 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2024-05-12 10:35:05,419 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 107 transitions, 886 flow [2024-05-12 10:35:05,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:05,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:05,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:05,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:35:05,419 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:05,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:05,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1712019449, now seen corresponding path program 2 times [2024-05-12 10:35:05,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:05,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847646848] [2024-05-12 10:35:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:05,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:05,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:05,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847646848] [2024-05-12 10:35:05,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847646848] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:05,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:05,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:05,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796636934] [2024-05-12 10:35:05,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:05,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:05,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:05,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:05,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:05,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:05,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 107 transitions, 886 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:05,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:05,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:05,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:06,176 INFO L124 PetriNetUnfolderBase]: 2097/3446 cut-off events. [2024-05-12 10:35:06,177 INFO L125 PetriNetUnfolderBase]: For 30555/30555 co-relation queries the response was YES. [2024-05-12 10:35:06,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15100 conditions, 3446 events. 2097/3446 cut-off events. For 30555/30555 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 20985 event pairs, 396 based on Foata normal form. 12/3449 useless extension candidates. Maximal degree in co-relation 15055. Up to 2569 conditions per place. [2024-05-12 10:35:06,199 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 103 selfloop transitions, 41 changer transitions 0/156 dead transitions. [2024-05-12 10:35:06,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 156 transitions, 1294 flow [2024-05-12 10:35:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-05-12 10:35:06,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-05-12 10:35:06,200 INFO L175 Difference]: Start difference. First operand has 103 places, 107 transitions, 886 flow. Second operand 8 states and 233 transitions. [2024-05-12 10:35:06,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 156 transitions, 1294 flow [2024-05-12 10:35:06,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 156 transitions, 1241 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:06,230 INFO L231 Difference]: Finished difference. Result has 108 places, 107 transitions, 921 flow [2024-05-12 10:35:06,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=921, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2024-05-12 10:35:06,231 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 58 predicate places. [2024-05-12 10:35:06,231 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 921 flow [2024-05-12 10:35:06,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:06,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:06,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:06,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:35:06,232 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:06,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:06,232 INFO L85 PathProgramCache]: Analyzing trace with hash 255642402, now seen corresponding path program 1 times [2024-05-12 10:35:06,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:06,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660316586] [2024-05-12 10:35:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:06,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:06,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:06,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660316586] [2024-05-12 10:35:06,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660316586] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:06,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:06,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:06,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500732944] [2024-05-12 10:35:06,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:06,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:06,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:06,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:06,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 921 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:06,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:06,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:06,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:06,893 INFO L124 PetriNetUnfolderBase]: 2172/3578 cut-off events. [2024-05-12 10:35:06,893 INFO L125 PetriNetUnfolderBase]: For 33212/33214 co-relation queries the response was YES. [2024-05-12 10:35:06,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15685 conditions, 3578 events. 2172/3578 cut-off events. For 33212/33214 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22161 event pairs, 519 based on Foata normal form. 3/3568 useless extension candidates. Maximal degree in co-relation 15639. Up to 2842 conditions per place. [2024-05-12 10:35:06,926 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 102 selfloop transitions, 48 changer transitions 0/162 dead transitions. [2024-05-12 10:35:06,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 162 transitions, 1583 flow [2024-05-12 10:35:06,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:06,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-05-12 10:35:06,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6630434782608695 [2024-05-12 10:35:06,928 INFO L175 Difference]: Start difference. First operand has 108 places, 107 transitions, 921 flow. Second operand 6 states and 183 transitions. [2024-05-12 10:35:06,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 162 transitions, 1583 flow [2024-05-12 10:35:07,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 162 transitions, 1472 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-05-12 10:35:07,021 INFO L231 Difference]: Finished difference. Result has 108 places, 127 transitions, 1124 flow [2024-05-12 10:35:07,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1124, PETRI_PLACES=108, PETRI_TRANSITIONS=127} [2024-05-12 10:35:07,022 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 58 predicate places. [2024-05-12 10:35:07,022 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 127 transitions, 1124 flow [2024-05-12 10:35:07,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:07,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:07,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:07,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:35:07,023 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:07,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:07,024 INFO L85 PathProgramCache]: Analyzing trace with hash -38542033, now seen corresponding path program 3 times [2024-05-12 10:35:07,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:07,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135801012] [2024-05-12 10:35:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:07,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:07,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:07,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135801012] [2024-05-12 10:35:07,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135801012] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:07,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:07,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:07,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939835589] [2024-05-12 10:35:07,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:07,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:07,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:07,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:07,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:07,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 127 transitions, 1124 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:07,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:07,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:07,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:07,804 INFO L124 PetriNetUnfolderBase]: 2326/3813 cut-off events. [2024-05-12 10:35:07,804 INFO L125 PetriNetUnfolderBase]: For 41772/41788 co-relation queries the response was YES. [2024-05-12 10:35:07,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17770 conditions, 3813 events. 2326/3813 cut-off events. For 41772/41788 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 23795 event pairs, 424 based on Foata normal form. 22/3817 useless extension candidates. Maximal degree in co-relation 17722. Up to 2812 conditions per place. [2024-05-12 10:35:07,830 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 126 selfloop transitions, 30 changer transitions 0/168 dead transitions. [2024-05-12 10:35:07,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 168 transitions, 1638 flow [2024-05-12 10:35:07,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:07,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-05-12 10:35:07,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:35:07,833 INFO L175 Difference]: Start difference. First operand has 108 places, 127 transitions, 1124 flow. Second operand 6 states and 180 transitions. [2024-05-12 10:35:07,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 168 transitions, 1638 flow [2024-05-12 10:35:07,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 168 transitions, 1600 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-05-12 10:35:07,879 INFO L231 Difference]: Finished difference. Result has 114 places, 129 transitions, 1180 flow [2024-05-12 10:35:07,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1180, PETRI_PLACES=114, PETRI_TRANSITIONS=129} [2024-05-12 10:35:07,879 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 64 predicate places. [2024-05-12 10:35:07,879 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 129 transitions, 1180 flow [2024-05-12 10:35:07,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:07,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:07,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:07,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:35:07,880 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:07,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:07,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1838218469, now seen corresponding path program 4 times [2024-05-12 10:35:07,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:07,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836689183] [2024-05-12 10:35:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:07,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:07,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:08,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:08,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836689183] [2024-05-12 10:35:08,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836689183] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:08,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:08,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:08,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925067793] [2024-05-12 10:35:08,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:08,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:08,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:08,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 129 transitions, 1180 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:08,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:08,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:08,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:08,601 INFO L124 PetriNetUnfolderBase]: 2420/3974 cut-off events. [2024-05-12 10:35:08,601 INFO L125 PetriNetUnfolderBase]: For 46529/46531 co-relation queries the response was YES. [2024-05-12 10:35:08,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18710 conditions, 3974 events. 2420/3974 cut-off events. For 46529/46531 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25154 event pairs, 590 based on Foata normal form. 18/3979 useless extension candidates. Maximal degree in co-relation 18659. Up to 3307 conditions per place. [2024-05-12 10:35:08,630 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 129 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2024-05-12 10:35:08,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 170 transitions, 1613 flow [2024-05-12 10:35:08,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:35:08,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-05-12 10:35:08,631 INFO L175 Difference]: Start difference. First operand has 114 places, 129 transitions, 1180 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:35:08,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 170 transitions, 1613 flow [2024-05-12 10:35:08,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 170 transitions, 1571 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:08,677 INFO L231 Difference]: Finished difference. Result has 119 places, 130 transitions, 1220 flow [2024-05-12 10:35:08,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1140, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1220, PETRI_PLACES=119, PETRI_TRANSITIONS=130} [2024-05-12 10:35:08,678 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-05-12 10:35:08,678 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 130 transitions, 1220 flow [2024-05-12 10:35:08,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:08,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:08,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:08,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:35:08,679 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:08,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:08,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1118282037, now seen corresponding path program 5 times [2024-05-12 10:35:08,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:08,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094498558] [2024-05-12 10:35:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:08,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:08,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:08,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:08,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094498558] [2024-05-12 10:35:08,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094498558] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:08,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:08,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:08,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928451026] [2024-05-12 10:35:08,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:08,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:08,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:08,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:08,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:08,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:08,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 130 transitions, 1220 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:08,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:08,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:08,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:09,348 INFO L124 PetriNetUnfolderBase]: 2392/4063 cut-off events. [2024-05-12 10:35:09,349 INFO L125 PetriNetUnfolderBase]: For 47128/47144 co-relation queries the response was YES. [2024-05-12 10:35:09,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18621 conditions, 4063 events. 2392/4063 cut-off events. For 47128/47144 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 26548 event pairs, 879 based on Foata normal form. 26/4034 useless extension candidates. Maximal degree in co-relation 18568. Up to 3263 conditions per place. [2024-05-12 10:35:09,377 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 125 selfloop transitions, 27 changer transitions 0/164 dead transitions. [2024-05-12 10:35:09,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 164 transitions, 1612 flow [2024-05-12 10:35:09,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 10:35:09,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 10:35:09,378 INFO L175 Difference]: Start difference. First operand has 119 places, 130 transitions, 1220 flow. Second operand 6 states and 175 transitions. [2024-05-12 10:35:09,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 164 transitions, 1612 flow [2024-05-12 10:35:09,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 164 transitions, 1555 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:09,429 INFO L231 Difference]: Finished difference. Result has 121 places, 130 transitions, 1224 flow [2024-05-12 10:35:09,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1163, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1224, PETRI_PLACES=121, PETRI_TRANSITIONS=130} [2024-05-12 10:35:09,430 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 71 predicate places. [2024-05-12 10:35:09,430 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 130 transitions, 1224 flow [2024-05-12 10:35:09,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:09,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:09,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:09,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:35:09,431 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:09,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1838433671, now seen corresponding path program 1 times [2024-05-12 10:35:09,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:09,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350545617] [2024-05-12 10:35:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:09,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:09,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:09,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350545617] [2024-05-12 10:35:09,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350545617] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:09,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:09,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:09,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11090696] [2024-05-12 10:35:09,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:09,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:09,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:09,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:09,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 130 transitions, 1224 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:09,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:09,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:09,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:10,121 INFO L124 PetriNetUnfolderBase]: 2459/4139 cut-off events. [2024-05-12 10:35:10,121 INFO L125 PetriNetUnfolderBase]: For 48374/48376 co-relation queries the response was YES. [2024-05-12 10:35:10,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19018 conditions, 4139 events. 2459/4139 cut-off events. For 48374/48376 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26827 event pairs, 690 based on Foata normal form. 14/4114 useless extension candidates. Maximal degree in co-relation 18963. Up to 2957 conditions per place. [2024-05-12 10:35:10,152 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 129 selfloop transitions, 33 changer transitions 0/174 dead transitions. [2024-05-12 10:35:10,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 174 transitions, 1675 flow [2024-05-12 10:35:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:35:10,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:35:10,154 INFO L175 Difference]: Start difference. First operand has 121 places, 130 transitions, 1224 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:35:10,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 174 transitions, 1675 flow [2024-05-12 10:35:10,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 174 transitions, 1607 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:10,211 INFO L231 Difference]: Finished difference. Result has 123 places, 131 transitions, 1245 flow [2024-05-12 10:35:10,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1245, PETRI_PLACES=123, PETRI_TRANSITIONS=131} [2024-05-12 10:35:10,212 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 73 predicate places. [2024-05-12 10:35:10,212 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 131 transitions, 1245 flow [2024-05-12 10:35:10,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:10,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:10,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:10,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:35:10,212 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:10,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash -605600482, now seen corresponding path program 2 times [2024-05-12 10:35:10,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:10,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083119713] [2024-05-12 10:35:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:10,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:10,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:10,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083119713] [2024-05-12 10:35:10,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083119713] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:10,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:10,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:10,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573494046] [2024-05-12 10:35:10,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:10,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:10,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:10,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:10,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:10,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:10,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 131 transitions, 1245 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:10,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:10,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:10,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:10,864 INFO L124 PetriNetUnfolderBase]: 2538/4181 cut-off events. [2024-05-12 10:35:10,864 INFO L125 PetriNetUnfolderBase]: For 50333/50335 co-relation queries the response was YES. [2024-05-12 10:35:10,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19761 conditions, 4181 events. 2538/4181 cut-off events. For 50333/50335 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 26745 event pairs, 591 based on Foata normal form. 3/4167 useless extension candidates. Maximal degree in co-relation 19705. Up to 3365 conditions per place. [2024-05-12 10:35:10,895 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 105 selfloop transitions, 53 changer transitions 0/170 dead transitions. [2024-05-12 10:35:10,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 170 transitions, 1895 flow [2024-05-12 10:35:10,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:10,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:35:10,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-05-12 10:35:10,897 INFO L175 Difference]: Start difference. First operand has 123 places, 131 transitions, 1245 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:35:10,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 170 transitions, 1895 flow [2024-05-12 10:35:10,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 170 transitions, 1821 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:10,957 INFO L231 Difference]: Finished difference. Result has 125 places, 141 transitions, 1408 flow [2024-05-12 10:35:10,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1408, PETRI_PLACES=125, PETRI_TRANSITIONS=141} [2024-05-12 10:35:10,957 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 75 predicate places. [2024-05-12 10:35:10,958 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 141 transitions, 1408 flow [2024-05-12 10:35:10,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:10,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:10,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:10,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:35:10,958 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:10,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:10,959 INFO L85 PathProgramCache]: Analyzing trace with hash -605600110, now seen corresponding path program 1 times [2024-05-12 10:35:10,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:10,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591930445] [2024-05-12 10:35:10,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:10,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:11,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591930445] [2024-05-12 10:35:11,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591930445] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:11,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:11,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:11,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440791106] [2024-05-12 10:35:11,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:11,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:11,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:11,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:11,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:11,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 141 transitions, 1408 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:11,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:11,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:11,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:11,691 INFO L124 PetriNetUnfolderBase]: 2549/4291 cut-off events. [2024-05-12 10:35:11,691 INFO L125 PetriNetUnfolderBase]: For 52569/52569 co-relation queries the response was YES. [2024-05-12 10:35:11,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20176 conditions, 4291 events. 2549/4291 cut-off events. For 52569/52569 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 28014 event pairs, 938 based on Foata normal form. 1/4255 useless extension candidates. Maximal degree in co-relation 20118. Up to 3766 conditions per place. [2024-05-12 10:35:11,727 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 135 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2024-05-12 10:35:11,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 172 transitions, 1924 flow [2024-05-12 10:35:11,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:11,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 10:35:11,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:35:11,729 INFO L175 Difference]: Start difference. First operand has 125 places, 141 transitions, 1408 flow. Second operand 6 states and 165 transitions. [2024-05-12 10:35:11,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 172 transitions, 1924 flow [2024-05-12 10:35:11,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 172 transitions, 1835 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:11,806 INFO L231 Difference]: Finished difference. Result has 129 places, 147 transitions, 1469 flow [2024-05-12 10:35:11,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1469, PETRI_PLACES=129, PETRI_TRANSITIONS=147} [2024-05-12 10:35:11,807 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 79 predicate places. [2024-05-12 10:35:11,807 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 147 transitions, 1469 flow [2024-05-12 10:35:11,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:11,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:11,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:11,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:35:11,808 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:11,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1587959235, now seen corresponding path program 2 times [2024-05-12 10:35:11,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:11,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792851710] [2024-05-12 10:35:11,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:11,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:12,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:12,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792851710] [2024-05-12 10:35:12,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792851710] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:12,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:12,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:12,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513045526] [2024-05-12 10:35:12,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:12,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:12,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:12,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:12,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:12,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:12,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 147 transitions, 1469 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:12,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:12,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:12,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:12,525 INFO L124 PetriNetUnfolderBase]: 2529/4286 cut-off events. [2024-05-12 10:35:12,525 INFO L125 PetriNetUnfolderBase]: For 55895/55897 co-relation queries the response was YES. [2024-05-12 10:35:12,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19867 conditions, 4286 events. 2529/4286 cut-off events. For 55895/55897 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 27998 event pairs, 664 based on Foata normal form. 12/4243 useless extension candidates. Maximal degree in co-relation 19808. Up to 3215 conditions per place. [2024-05-12 10:35:12,556 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 137 selfloop transitions, 35 changer transitions 0/184 dead transitions. [2024-05-12 10:35:12,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 184 transitions, 1911 flow [2024-05-12 10:35:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:12,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-05-12 10:35:12,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:35:12,558 INFO L175 Difference]: Start difference. First operand has 129 places, 147 transitions, 1469 flow. Second operand 6 states and 180 transitions. [2024-05-12 10:35:12,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 184 transitions, 1911 flow [2024-05-12 10:35:12,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 184 transitions, 1859 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:12,626 INFO L231 Difference]: Finished difference. Result has 133 places, 147 transitions, 1493 flow [2024-05-12 10:35:12,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1493, PETRI_PLACES=133, PETRI_TRANSITIONS=147} [2024-05-12 10:35:12,626 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2024-05-12 10:35:12,626 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 147 transitions, 1493 flow [2024-05-12 10:35:12,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:12,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:12,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:12,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:35:12,627 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:12,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:12,627 INFO L85 PathProgramCache]: Analyzing trace with hash -2118676183, now seen corresponding path program 3 times [2024-05-12 10:35:12,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:12,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447208175] [2024-05-12 10:35:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:12,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:12,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:12,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447208175] [2024-05-12 10:35:12,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447208175] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:12,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:12,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:12,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468834730] [2024-05-12 10:35:12,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:12,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:12,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:12,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:12,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:12,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:12,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 147 transitions, 1493 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:12,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:12,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:12,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:13,274 INFO L124 PetriNetUnfolderBase]: 2509/4231 cut-off events. [2024-05-12 10:35:13,275 INFO L125 PetriNetUnfolderBase]: For 56949/56963 co-relation queries the response was YES. [2024-05-12 10:35:13,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19836 conditions, 4231 events. 2509/4231 cut-off events. For 56949/56963 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27545 event pairs, 504 based on Foata normal form. 15/4198 useless extension candidates. Maximal degree in co-relation 19775. Up to 2207 conditions per place. [2024-05-12 10:35:13,305 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 130 selfloop transitions, 36 changer transitions 0/178 dead transitions. [2024-05-12 10:35:13,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 178 transitions, 1863 flow [2024-05-12 10:35:13,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:13,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-05-12 10:35:13,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6159420289855072 [2024-05-12 10:35:13,306 INFO L175 Difference]: Start difference. First operand has 133 places, 147 transitions, 1493 flow. Second operand 6 states and 170 transitions. [2024-05-12 10:35:13,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 178 transitions, 1863 flow [2024-05-12 10:35:13,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 178 transitions, 1762 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:13,376 INFO L231 Difference]: Finished difference. Result has 133 places, 146 transitions, 1422 flow [2024-05-12 10:35:13,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1346, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1422, PETRI_PLACES=133, PETRI_TRANSITIONS=146} [2024-05-12 10:35:13,377 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 83 predicate places. [2024-05-12 10:35:13,377 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 146 transitions, 1422 flow [2024-05-12 10:35:13,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:13,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:13,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:13,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:35:13,378 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:13,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:13,378 INFO L85 PathProgramCache]: Analyzing trace with hash -593636032, now seen corresponding path program 3 times [2024-05-12 10:35:13,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:13,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879944691] [2024-05-12 10:35:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:13,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:13,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:13,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879944691] [2024-05-12 10:35:13,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879944691] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:13,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:13,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:13,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192611534] [2024-05-12 10:35:13,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:13,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:13,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:13,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:13,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:13,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:13,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 146 transitions, 1422 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:13,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:13,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:13,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:14,138 INFO L124 PetriNetUnfolderBase]: 2695/4399 cut-off events. [2024-05-12 10:35:14,138 INFO L125 PetriNetUnfolderBase]: For 55923/55925 co-relation queries the response was YES. [2024-05-12 10:35:14,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21189 conditions, 4399 events. 2695/4399 cut-off events. For 55923/55925 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 28068 event pairs, 524 based on Foata normal form. 8/4400 useless extension candidates. Maximal degree in co-relation 21127. Up to 3591 conditions per place. [2024-05-12 10:35:14,172 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 127 selfloop transitions, 68 changer transitions 0/207 dead transitions. [2024-05-12 10:35:14,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 207 transitions, 2263 flow [2024-05-12 10:35:14,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-05-12 10:35:14,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-05-12 10:35:14,173 INFO L175 Difference]: Start difference. First operand has 133 places, 146 transitions, 1422 flow. Second operand 6 states and 186 transitions. [2024-05-12 10:35:14,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 207 transitions, 2263 flow [2024-05-12 10:35:14,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 207 transitions, 2111 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-05-12 10:35:14,270 INFO L231 Difference]: Finished difference. Result has 134 places, 170 transitions, 1759 flow [2024-05-12 10:35:14,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1759, PETRI_PLACES=134, PETRI_TRANSITIONS=170} [2024-05-12 10:35:14,271 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 84 predicate places. [2024-05-12 10:35:14,271 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 170 transitions, 1759 flow [2024-05-12 10:35:14,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:14,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:14,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:14,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:35:14,272 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:14,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:14,272 INFO L85 PathProgramCache]: Analyzing trace with hash -39523060, now seen corresponding path program 2 times [2024-05-12 10:35:14,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:14,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310103512] [2024-05-12 10:35:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:14,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:14,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310103512] [2024-05-12 10:35:14,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310103512] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:14,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:14,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:14,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297004680] [2024-05-12 10:35:14,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:14,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:14,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:14,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:14,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 170 transitions, 1759 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:14,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:14,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:14,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:14,963 INFO L124 PetriNetUnfolderBase]: 2692/4525 cut-off events. [2024-05-12 10:35:14,963 INFO L125 PetriNetUnfolderBase]: For 60106/60106 co-relation queries the response was YES. [2024-05-12 10:35:14,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22023 conditions, 4525 events. 2692/4525 cut-off events. For 60106/60106 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29777 event pairs, 946 based on Foata normal form. 1/4487 useless extension candidates. Maximal degree in co-relation 21960. Up to 3967 conditions per place. [2024-05-12 10:35:14,996 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 159 selfloop transitions, 20 changer transitions 0/191 dead transitions. [2024-05-12 10:35:14,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 191 transitions, 2167 flow [2024-05-12 10:35:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:35:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:35:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-05-12 10:35:14,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-05-12 10:35:14,998 INFO L175 Difference]: Start difference. First operand has 134 places, 170 transitions, 1759 flow. Second operand 5 states and 141 transitions. [2024-05-12 10:35:14,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 191 transitions, 2167 flow [2024-05-12 10:35:15,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 191 transitions, 2100 flow, removed 28 selfloop flow, removed 1 redundant places. [2024-05-12 10:35:15,197 INFO L231 Difference]: Finished difference. Result has 138 places, 170 transitions, 1738 flow [2024-05-12 10:35:15,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1738, PETRI_PLACES=138, PETRI_TRANSITIONS=170} [2024-05-12 10:35:15,198 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 88 predicate places. [2024-05-12 10:35:15,198 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 170 transitions, 1738 flow [2024-05-12 10:35:15,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:15,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:15,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:15,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:35:15,199 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:15,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:15,199 INFO L85 PathProgramCache]: Analyzing trace with hash 204023956, now seen corresponding path program 1 times [2024-05-12 10:35:15,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:15,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847628173] [2024-05-12 10:35:15,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:15,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:15,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:15,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847628173] [2024-05-12 10:35:15,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847628173] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:15,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:15,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:15,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923388662] [2024-05-12 10:35:15,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:15,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:15,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:15,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:15,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:15,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:15,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 170 transitions, 1738 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:15,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:15,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:15,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:15,942 INFO L124 PetriNetUnfolderBase]: 2739/4524 cut-off events. [2024-05-12 10:35:15,942 INFO L125 PetriNetUnfolderBase]: For 65462/65474 co-relation queries the response was YES. [2024-05-12 10:35:15,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22407 conditions, 4524 events. 2739/4524 cut-off events. For 65462/65474 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29398 event pairs, 581 based on Foata normal form. 6/4510 useless extension candidates. Maximal degree in co-relation 22342. Up to 3583 conditions per place. [2024-05-12 10:35:15,979 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 121 selfloop transitions, 77 changer transitions 0/210 dead transitions. [2024-05-12 10:35:15,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 210 transitions, 2515 flow [2024-05-12 10:35:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:15,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-05-12 10:35:15,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376811594202898 [2024-05-12 10:35:15,981 INFO L175 Difference]: Start difference. First operand has 138 places, 170 transitions, 1738 flow. Second operand 6 states and 176 transitions. [2024-05-12 10:35:15,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 210 transitions, 2515 flow [2024-05-12 10:35:16,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 210 transitions, 2449 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:16,089 INFO L231 Difference]: Finished difference. Result has 141 places, 183 transitions, 2017 flow [2024-05-12 10:35:16,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2017, PETRI_PLACES=141, PETRI_TRANSITIONS=183} [2024-05-12 10:35:16,090 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-05-12 10:35:16,090 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 183 transitions, 2017 flow [2024-05-12 10:35:16,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:16,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:16,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:16,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:35:16,091 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:16,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:16,091 INFO L85 PathProgramCache]: Analyzing trace with hash 90670260, now seen corresponding path program 2 times [2024-05-12 10:35:16,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:16,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930385843] [2024-05-12 10:35:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:16,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:16,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:16,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930385843] [2024-05-12 10:35:16,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930385843] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:16,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:16,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:16,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588145449] [2024-05-12 10:35:16,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:16,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:16,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:16,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:16,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:16,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:16,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 183 transitions, 2017 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:16,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:16,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:16,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:16,826 INFO L124 PetriNetUnfolderBase]: 2865/4730 cut-off events. [2024-05-12 10:35:16,827 INFO L125 PetriNetUnfolderBase]: For 73112/73112 co-relation queries the response was YES. [2024-05-12 10:35:16,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24769 conditions, 4730 events. 2865/4730 cut-off events. For 73112/73112 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30776 event pairs, 887 based on Foata normal form. 4/4719 useless extension candidates. Maximal degree in co-relation 24702. Up to 4136 conditions per place. [2024-05-12 10:35:16,869 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 181 selfloop transitions, 37 changer transitions 0/230 dead transitions. [2024-05-12 10:35:16,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 230 transitions, 2900 flow [2024-05-12 10:35:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 10:35:16,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838509316770186 [2024-05-12 10:35:16,870 INFO L175 Difference]: Start difference. First operand has 141 places, 183 transitions, 2017 flow. Second operand 7 states and 188 transitions. [2024-05-12 10:35:16,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 230 transitions, 2900 flow [2024-05-12 10:35:16,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 230 transitions, 2804 flow, removed 48 selfloop flow, removed 0 redundant places. [2024-05-12 10:35:17,000 INFO L231 Difference]: Finished difference. Result has 149 places, 204 transitions, 2376 flow [2024-05-12 10:35:17,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2376, PETRI_PLACES=149, PETRI_TRANSITIONS=204} [2024-05-12 10:35:17,001 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 99 predicate places. [2024-05-12 10:35:17,001 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 204 transitions, 2376 flow [2024-05-12 10:35:17,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:17,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:17,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:17,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:35:17,002 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:17,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:17,002 INFO L85 PathProgramCache]: Analyzing trace with hash 753067126, now seen corresponding path program 3 times [2024-05-12 10:35:17,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:17,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482580540] [2024-05-12 10:35:17,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:17,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:17,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:17,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482580540] [2024-05-12 10:35:17,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482580540] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:17,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:17,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:17,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795474565] [2024-05-12 10:35:17,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:17,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:17,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:17,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:17,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:17,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:17,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 204 transitions, 2376 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:17,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:17,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:17,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:17,858 INFO L124 PetriNetUnfolderBase]: 2869/4693 cut-off events. [2024-05-12 10:35:17,858 INFO L125 PetriNetUnfolderBase]: For 76014/76014 co-relation queries the response was YES. [2024-05-12 10:35:17,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24977 conditions, 4693 events. 2869/4693 cut-off events. For 76014/76014 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 30368 event pairs, 523 based on Foata normal form. 6/4689 useless extension candidates. Maximal degree in co-relation 24906. Up to 3728 conditions per place. [2024-05-12 10:35:17,899 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 136 selfloop transitions, 99 changer transitions 0/247 dead transitions. [2024-05-12 10:35:17,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 247 transitions, 3137 flow [2024-05-12 10:35:17,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 10:35:17,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-05-12 10:35:17,900 INFO L175 Difference]: Start difference. First operand has 149 places, 204 transitions, 2376 flow. Second operand 7 states and 209 transitions. [2024-05-12 10:35:17,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 247 transitions, 3137 flow [2024-05-12 10:35:18,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 247 transitions, 3007 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:18,029 INFO L231 Difference]: Finished difference. Result has 153 places, 209 transitions, 2561 flow [2024-05-12 10:35:18,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2561, PETRI_PLACES=153, PETRI_TRANSITIONS=209} [2024-05-12 10:35:18,029 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-05-12 10:35:18,030 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 209 transitions, 2561 flow [2024-05-12 10:35:18,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:18,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:18,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:18,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:35:18,030 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:18,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:18,031 INFO L85 PathProgramCache]: Analyzing trace with hash -39092470, now seen corresponding path program 1 times [2024-05-12 10:35:18,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:18,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581335255] [2024-05-12 10:35:18,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:18,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:18,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:18,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581335255] [2024-05-12 10:35:18,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581335255] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:18,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:18,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:18,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082035093] [2024-05-12 10:35:18,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:18,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:18,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:18,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:18,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:18,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 209 transitions, 2561 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:18,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:18,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:18,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:18,920 INFO L124 PetriNetUnfolderBase]: 2864/4641 cut-off events. [2024-05-12 10:35:18,921 INFO L125 PetriNetUnfolderBase]: For 77675/77675 co-relation queries the response was YES. [2024-05-12 10:35:18,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25520 conditions, 4641 events. 2864/4641 cut-off events. For 77675/77675 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 29707 event pairs, 511 based on Foata normal form. 2/4635 useless extension candidates. Maximal degree in co-relation 25448. Up to 4229 conditions per place. [2024-05-12 10:35:18,964 INFO L140 encePairwiseOnDemand]: 41/46 looper letters, 202 selfloop transitions, 10 changer transitions 0/224 dead transitions. [2024-05-12 10:35:18,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 224 transitions, 3045 flow [2024-05-12 10:35:18,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:35:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:35:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-05-12 10:35:18,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2024-05-12 10:35:18,966 INFO L175 Difference]: Start difference. First operand has 153 places, 209 transitions, 2561 flow. Second operand 4 states and 111 transitions. [2024-05-12 10:35:18,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 224 transitions, 3045 flow [2024-05-12 10:35:19,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 224 transitions, 2867 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:19,112 INFO L231 Difference]: Finished difference. Result has 153 places, 211 transitions, 2442 flow [2024-05-12 10:35:19,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2383, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2442, PETRI_PLACES=153, PETRI_TRANSITIONS=211} [2024-05-12 10:35:19,112 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-05-12 10:35:19,113 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 211 transitions, 2442 flow [2024-05-12 10:35:19,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:19,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:19,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:19,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:35:19,113 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:19,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:19,114 INFO L85 PathProgramCache]: Analyzing trace with hash 123092434, now seen corresponding path program 1 times [2024-05-12 10:35:19,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:19,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3743133] [2024-05-12 10:35:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:19,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:19,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:19,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3743133] [2024-05-12 10:35:19,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3743133] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:19,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:19,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:19,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867404020] [2024-05-12 10:35:19,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:19,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:19,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:19,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:19,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:19,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 211 transitions, 2442 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:19,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:19,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:19,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:20,045 INFO L124 PetriNetUnfolderBase]: 2939/4880 cut-off events. [2024-05-12 10:35:20,046 INFO L125 PetriNetUnfolderBase]: For 87281/87283 co-relation queries the response was YES. [2024-05-12 10:35:20,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25948 conditions, 4880 events. 2939/4880 cut-off events. For 87281/87283 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 32311 event pairs, 602 based on Foata normal form. 3/4854 useless extension candidates. Maximal degree in co-relation 25875. Up to 3378 conditions per place. [2024-05-12 10:35:20,095 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 131 selfloop transitions, 124 changer transitions 0/267 dead transitions. [2024-05-12 10:35:20,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 267 transitions, 3504 flow [2024-05-12 10:35:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:20,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-05-12 10:35:20,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6490683229813664 [2024-05-12 10:35:20,097 INFO L175 Difference]: Start difference. First operand has 153 places, 211 transitions, 2442 flow. Second operand 7 states and 209 transitions. [2024-05-12 10:35:20,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 267 transitions, 3504 flow [2024-05-12 10:35:20,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 267 transitions, 3457 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:20,249 INFO L231 Difference]: Finished difference. Result has 160 places, 230 transitions, 3033 flow [2024-05-12 10:35:20,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3033, PETRI_PLACES=160, PETRI_TRANSITIONS=230} [2024-05-12 10:35:20,249 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 110 predicate places. [2024-05-12 10:35:20,250 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 230 transitions, 3033 flow [2024-05-12 10:35:20,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:20,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:20,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:20,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:35:20,250 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:20,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:20,251 INFO L85 PathProgramCache]: Analyzing trace with hash -864091137, now seen corresponding path program 1 times [2024-05-12 10:35:20,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:20,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25228463] [2024-05-12 10:35:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:20,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:20,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:20,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25228463] [2024-05-12 10:35:20,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25228463] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:20,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:20,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:20,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549649591] [2024-05-12 10:35:20,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:20,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:20,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:20,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:20,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:20,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:20,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 230 transitions, 3033 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:20,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:20,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:20,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:21,097 INFO L124 PetriNetUnfolderBase]: 2989/4906 cut-off events. [2024-05-12 10:35:21,098 INFO L125 PetriNetUnfolderBase]: For 98866/98868 co-relation queries the response was YES. [2024-05-12 10:35:21,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28846 conditions, 4906 events. 2989/4906 cut-off events. For 98866/98868 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 32160 event pairs, 590 based on Foata normal form. 2/4881 useless extension candidates. Maximal degree in co-relation 28770. Up to 3834 conditions per place. [2024-05-12 10:35:21,152 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 167 selfloop transitions, 91 changer transitions 0/270 dead transitions. [2024-05-12 10:35:21,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 270 transitions, 4024 flow [2024-05-12 10:35:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:21,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 177 transitions. [2024-05-12 10:35:21,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6413043478260869 [2024-05-12 10:35:21,154 INFO L175 Difference]: Start difference. First operand has 160 places, 230 transitions, 3033 flow. Second operand 6 states and 177 transitions. [2024-05-12 10:35:21,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 270 transitions, 4024 flow [2024-05-12 10:35:21,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 270 transitions, 3940 flow, removed 39 selfloop flow, removed 1 redundant places. [2024-05-12 10:35:21,333 INFO L231 Difference]: Finished difference. Result has 166 places, 240 transitions, 3362 flow [2024-05-12 10:35:21,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3362, PETRI_PLACES=166, PETRI_TRANSITIONS=240} [2024-05-12 10:35:21,333 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 116 predicate places. [2024-05-12 10:35:21,333 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 240 transitions, 3362 flow [2024-05-12 10:35:21,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:21,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:21,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:21,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 10:35:21,334 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:21,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1694776319, now seen corresponding path program 2 times [2024-05-12 10:35:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:21,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591971263] [2024-05-12 10:35:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:21,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591971263] [2024-05-12 10:35:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591971263] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:21,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:21,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:21,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411182405] [2024-05-12 10:35:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:21,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:21,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:21,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:21,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:21,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 240 transitions, 3362 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:21,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:21,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:21,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:22,228 INFO L124 PetriNetUnfolderBase]: 2983/4898 cut-off events. [2024-05-12 10:35:22,229 INFO L125 PetriNetUnfolderBase]: For 99950/99952 co-relation queries the response was YES. [2024-05-12 10:35:22,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28640 conditions, 4898 events. 2983/4898 cut-off events. For 99950/99952 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 32040 event pairs, 580 based on Foata normal form. 2/4874 useless extension candidates. Maximal degree in co-relation 28560. Up to 3831 conditions per place. [2024-05-12 10:35:22,278 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 168 selfloop transitions, 87 changer transitions 0/267 dead transitions. [2024-05-12 10:35:22,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 267 transitions, 4144 flow [2024-05-12 10:35:22,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:22,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-05-12 10:35:22,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6340579710144928 [2024-05-12 10:35:22,280 INFO L175 Difference]: Start difference. First operand has 166 places, 240 transitions, 3362 flow. Second operand 6 states and 175 transitions. [2024-05-12 10:35:22,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 267 transitions, 4144 flow [2024-05-12 10:35:22,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 267 transitions, 4017 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:22,483 INFO L231 Difference]: Finished difference. Result has 170 places, 240 transitions, 3418 flow [2024-05-12 10:35:22,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3235, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3418, PETRI_PLACES=170, PETRI_TRANSITIONS=240} [2024-05-12 10:35:22,484 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 120 predicate places. [2024-05-12 10:35:22,484 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 240 transitions, 3418 flow [2024-05-12 10:35:22,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:22,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:22,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:22,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 10:35:22,485 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:22,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:22,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1608954666, now seen corresponding path program 2 times [2024-05-12 10:35:22,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:22,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995257538] [2024-05-12 10:35:22,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:22,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:22,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:22,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995257538] [2024-05-12 10:35:22,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995257538] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:22,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:22,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:22,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362514102] [2024-05-12 10:35:22,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:22,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:22,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:22,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:22,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:22,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:22,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 240 transitions, 3418 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:22,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:22,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:22,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:23,426 INFO L124 PetriNetUnfolderBase]: 3104/5066 cut-off events. [2024-05-12 10:35:23,426 INFO L125 PetriNetUnfolderBase]: For 108630/108632 co-relation queries the response was YES. [2024-05-12 10:35:23,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30188 conditions, 5066 events. 3104/5066 cut-off events. For 108630/108632 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 33189 event pairs, 609 based on Foata normal form. 3/5040 useless extension candidates. Maximal degree in co-relation 30107. Up to 3474 conditions per place. [2024-05-12 10:35:23,477 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 146 selfloop transitions, 129 changer transitions 0/287 dead transitions. [2024-05-12 10:35:23,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 287 transitions, 4576 flow [2024-05-12 10:35:23,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:23,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:23,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:35:23,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:35:23,478 INFO L175 Difference]: Start difference. First operand has 170 places, 240 transitions, 3418 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:35:23,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 287 transitions, 4576 flow [2024-05-12 10:35:23,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 287 transitions, 4416 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:23,696 INFO L231 Difference]: Finished difference. Result has 175 places, 254 transitions, 3756 flow [2024-05-12 10:35:23,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3258, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3756, PETRI_PLACES=175, PETRI_TRANSITIONS=254} [2024-05-12 10:35:23,697 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 125 predicate places. [2024-05-12 10:35:23,697 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 254 transitions, 3756 flow [2024-05-12 10:35:23,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:23,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:23,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:23,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 10:35:23,698 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:23,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1608943506, now seen corresponding path program 3 times [2024-05-12 10:35:23,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:23,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186969134] [2024-05-12 10:35:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:23,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:23,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:23,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:23,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:23,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186969134] [2024-05-12 10:35:23,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186969134] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:23,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:23,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:23,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011119063] [2024-05-12 10:35:23,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:23,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:23,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:23,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:23,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:23,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:23,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 254 transitions, 3756 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:23,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:23,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:23,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:24,578 INFO L124 PetriNetUnfolderBase]: 3099/5115 cut-off events. [2024-05-12 10:35:24,578 INFO L125 PetriNetUnfolderBase]: For 116076/116078 co-relation queries the response was YES. [2024-05-12 10:35:24,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30746 conditions, 5115 events. 3099/5115 cut-off events. For 116076/116078 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 34005 event pairs, 626 based on Foata normal form. 3/5078 useless extension candidates. Maximal degree in co-relation 30663. Up to 3472 conditions per place. [2024-05-12 10:35:24,629 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 144 selfloop transitions, 130 changer transitions 0/286 dead transitions. [2024-05-12 10:35:24,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 286 transitions, 4641 flow [2024-05-12 10:35:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:24,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:24,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:35:24,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:35:24,631 INFO L175 Difference]: Start difference. First operand has 175 places, 254 transitions, 3756 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:35:24,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 286 transitions, 4641 flow [2024-05-12 10:35:24,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 286 transitions, 4385 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:24,858 INFO L231 Difference]: Finished difference. Result has 179 places, 255 transitions, 3791 flow [2024-05-12 10:35:24,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3791, PETRI_PLACES=179, PETRI_TRANSITIONS=255} [2024-05-12 10:35:24,858 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 129 predicate places. [2024-05-12 10:35:24,858 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 255 transitions, 3791 flow [2024-05-12 10:35:24,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:24,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:24,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:24,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 10:35:24,859 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:24,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:24,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1910390397, now seen corresponding path program 3 times [2024-05-12 10:35:24,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:24,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718784691] [2024-05-12 10:35:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:24,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:24,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:25,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:25,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718784691] [2024-05-12 10:35:25,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718784691] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:25,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:25,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733245180] [2024-05-12 10:35:25,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:25,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:25,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:25,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:25,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:25,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 255 transitions, 3791 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:25,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:25,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:25,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:25,750 INFO L124 PetriNetUnfolderBase]: 3085/5062 cut-off events. [2024-05-12 10:35:25,750 INFO L125 PetriNetUnfolderBase]: For 118769/118781 co-relation queries the response was YES. [2024-05-12 10:35:25,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30417 conditions, 5062 events. 3085/5062 cut-off events. For 118769/118781 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33446 event pairs, 586 based on Foata normal form. 5/5048 useless extension candidates. Maximal degree in co-relation 30333. Up to 3976 conditions per place. [2024-05-12 10:35:25,799 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 177 selfloop transitions, 93 changer transitions 0/282 dead transitions. [2024-05-12 10:35:25,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 282 transitions, 4621 flow [2024-05-12 10:35:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-05-12 10:35:25,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:35:25,800 INFO L175 Difference]: Start difference. First operand has 179 places, 255 transitions, 3791 flow. Second operand 6 states and 174 transitions. [2024-05-12 10:35:25,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 282 transitions, 4621 flow [2024-05-12 10:35:26,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 282 transitions, 4348 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:26,058 INFO L231 Difference]: Finished difference. Result has 181 places, 255 transitions, 3711 flow [2024-05-12 10:35:26,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3518, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3711, PETRI_PLACES=181, PETRI_TRANSITIONS=255} [2024-05-12 10:35:26,059 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-05-12 10:35:26,059 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 255 transitions, 3711 flow [2024-05-12 10:35:26,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:26,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:26,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:26,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 10:35:26,059 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:26,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2033487227, now seen corresponding path program 4 times [2024-05-12 10:35:26,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:26,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422714346] [2024-05-12 10:35:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:26,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:26,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422714346] [2024-05-12 10:35:26,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422714346] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:26,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:26,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:26,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190471716] [2024-05-12 10:35:26,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:26,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:26,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:26,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:26,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 255 transitions, 3711 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:26,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:26,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:26,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:26,914 INFO L124 PetriNetUnfolderBase]: 3069/5052 cut-off events. [2024-05-12 10:35:26,914 INFO L125 PetriNetUnfolderBase]: For 115925/115925 co-relation queries the response was YES. [2024-05-12 10:35:26,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29802 conditions, 5052 events. 3069/5052 cut-off events. For 115925/115925 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 33302 event pairs, 911 based on Foata normal form. 4/5040 useless extension candidates. Maximal degree in co-relation 29717. Up to 4421 conditions per place. [2024-05-12 10:35:26,965 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 231 selfloop transitions, 37 changer transitions 0/280 dead transitions. [2024-05-12 10:35:26,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 280 transitions, 4311 flow [2024-05-12 10:35:26,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:26,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:26,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 10:35:26,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807453416149069 [2024-05-12 10:35:26,967 INFO L175 Difference]: Start difference. First operand has 181 places, 255 transitions, 3711 flow. Second operand 7 states and 187 transitions. [2024-05-12 10:35:26,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 280 transitions, 4311 flow [2024-05-12 10:35:27,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 280 transitions, 3959 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-05-12 10:35:27,330 INFO L231 Difference]: Finished difference. Result has 180 places, 255 transitions, 3448 flow [2024-05-12 10:35:27,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3448, PETRI_PLACES=180, PETRI_TRANSITIONS=255} [2024-05-12 10:35:27,331 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 130 predicate places. [2024-05-12 10:35:27,331 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 255 transitions, 3448 flow [2024-05-12 10:35:27,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:27,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:27,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:27,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 10:35:27,332 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:27,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:27,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1225221857, now seen corresponding path program 5 times [2024-05-12 10:35:27,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:27,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727868174] [2024-05-12 10:35:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:27,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:27,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:27,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727868174] [2024-05-12 10:35:27,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727868174] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:27,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:27,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:27,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348544462] [2024-05-12 10:35:27,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:27,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:27,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:27,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:27,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:27,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:27,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 255 transitions, 3448 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:27,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:27,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:27,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:28,320 INFO L124 PetriNetUnfolderBase]: 3067/4984 cut-off events. [2024-05-12 10:35:28,324 INFO L125 PetriNetUnfolderBase]: For 113490/113492 co-relation queries the response was YES. [2024-05-12 10:35:28,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28835 conditions, 4984 events. 3067/4984 cut-off events. For 113490/113492 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 32533 event pairs, 525 based on Foata normal form. 6/4981 useless extension candidates. Maximal degree in co-relation 28751. Up to 3991 conditions per place. [2024-05-12 10:35:28,378 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 183 selfloop transitions, 95 changer transitions 0/290 dead transitions. [2024-05-12 10:35:28,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 290 transitions, 4310 flow [2024-05-12 10:35:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:35:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:35:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-05-12 10:35:28,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6594202898550725 [2024-05-12 10:35:28,380 INFO L175 Difference]: Start difference. First operand has 180 places, 255 transitions, 3448 flow. Second operand 6 states and 182 transitions. [2024-05-12 10:35:28,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 290 transitions, 4310 flow [2024-05-12 10:35:28,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 290 transitions, 4231 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:28,692 INFO L231 Difference]: Finished difference. Result has 181 places, 258 transitions, 3651 flow [2024-05-12 10:35:28,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3651, PETRI_PLACES=181, PETRI_TRANSITIONS=258} [2024-05-12 10:35:28,693 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-05-12 10:35:28,693 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 258 transitions, 3651 flow [2024-05-12 10:35:28,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:28,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:28,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:28,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 10:35:28,694 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:28,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:28,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1219507937, now seen corresponding path program 6 times [2024-05-12 10:35:28,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:28,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633645545] [2024-05-12 10:35:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:28,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:28,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:28,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633645545] [2024-05-12 10:35:28,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633645545] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:28,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:28,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:35:28,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595481056] [2024-05-12 10:35:28,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:35:28,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:35:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:35:28,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:28,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 258 transitions, 3651 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:28,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:28,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:28,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:29,624 INFO L124 PetriNetUnfolderBase]: 3043/4968 cut-off events. [2024-05-12 10:35:29,624 INFO L125 PetriNetUnfolderBase]: For 116612/116612 co-relation queries the response was YES. [2024-05-12 10:35:29,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28983 conditions, 4968 events. 3043/4968 cut-off events. For 116612/116612 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32477 event pairs, 514 based on Foata normal form. 4/4967 useless extension candidates. Maximal degree in co-relation 28898. Up to 3971 conditions per place. [2024-05-12 10:35:29,678 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 181 selfloop transitions, 102 changer transitions 0/295 dead transitions. [2024-05-12 10:35:29,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 295 transitions, 4387 flow [2024-05-12 10:35:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:29,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:29,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-05-12 10:35:29,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-05-12 10:35:29,680 INFO L175 Difference]: Start difference. First operand has 181 places, 258 transitions, 3651 flow. Second operand 7 states and 208 transitions. [2024-05-12 10:35:29,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 295 transitions, 4387 flow [2024-05-12 10:35:29,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 295 transitions, 4191 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:29,969 INFO L231 Difference]: Finished difference. Result has 184 places, 258 transitions, 3693 flow [2024-05-12 10:35:29,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3457, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3693, PETRI_PLACES=184, PETRI_TRANSITIONS=258} [2024-05-12 10:35:29,970 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 134 predicate places. [2024-05-12 10:35:29,970 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 258 transitions, 3693 flow [2024-05-12 10:35:29,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-05-12 10:35:29,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:29,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:29,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 10:35:29,971 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:29,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1225214324, now seen corresponding path program 4 times [2024-05-12 10:35:29,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:29,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530350251] [2024-05-12 10:35:29,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:29,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:30,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:30,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530350251] [2024-05-12 10:35:30,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530350251] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:30,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:30,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:30,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900474395] [2024-05-12 10:35:30,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:30,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:30,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:30,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:30,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:30,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:30,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 258 transitions, 3693 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:30,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:30,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:30,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:30,904 INFO L124 PetriNetUnfolderBase]: 3178/5227 cut-off events. [2024-05-12 10:35:30,904 INFO L125 PetriNetUnfolderBase]: For 125376/125378 co-relation queries the response was YES. [2024-05-12 10:35:30,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30682 conditions, 5227 events. 3178/5227 cut-off events. For 125376/125378 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 34810 event pairs, 556 based on Foata normal form. 5/5207 useless extension candidates. Maximal degree in co-relation 30597. Up to 3972 conditions per place. [2024-05-12 10:35:30,962 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 193 selfloop transitions, 108 changer transitions 0/313 dead transitions. [2024-05-12 10:35:30,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 313 transitions, 4967 flow [2024-05-12 10:35:30,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:35:30,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:35:30,963 INFO L175 Difference]: Start difference. First operand has 184 places, 258 transitions, 3693 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:35:30,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 313 transitions, 4967 flow [2024-05-12 10:35:31,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 313 transitions, 4657 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-05-12 10:35:31,192 INFO L231 Difference]: Finished difference. Result has 184 places, 278 transitions, 4000 flow [2024-05-12 10:35:31,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4000, PETRI_PLACES=184, PETRI_TRANSITIONS=278} [2024-05-12 10:35:31,193 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 134 predicate places. [2024-05-12 10:35:31,193 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 278 transitions, 4000 flow [2024-05-12 10:35:31,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:31,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:31,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:31,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 10:35:31,194 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:31,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:31,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1225225484, now seen corresponding path program 5 times [2024-05-12 10:35:31,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:31,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357848894] [2024-05-12 10:35:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:31,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:31,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:31,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357848894] [2024-05-12 10:35:31,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357848894] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:31,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:31,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:31,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692912861] [2024-05-12 10:35:31,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:31,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:31,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:31,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:31,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:31,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 278 transitions, 4000 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:31,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:31,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:31,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:32,116 INFO L124 PetriNetUnfolderBase]: 3169/5221 cut-off events. [2024-05-12 10:35:32,117 INFO L125 PetriNetUnfolderBase]: For 120393/120395 co-relation queries the response was YES. [2024-05-12 10:35:32,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30711 conditions, 5221 events. 3169/5221 cut-off events. For 120393/120395 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 34805 event pairs, 540 based on Foata normal form. 5/5208 useless extension candidates. Maximal degree in co-relation 30625. Up to 3965 conditions per place. [2024-05-12 10:35:32,169 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 187 selfloop transitions, 120 changer transitions 0/319 dead transitions. [2024-05-12 10:35:32,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 319 transitions, 5007 flow [2024-05-12 10:35:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-05-12 10:35:32,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65527950310559 [2024-05-12 10:35:32,171 INFO L175 Difference]: Start difference. First operand has 184 places, 278 transitions, 4000 flow. Second operand 7 states and 211 transitions. [2024-05-12 10:35:32,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 319 transitions, 5007 flow [2024-05-12 10:35:32,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 319 transitions, 4898 flow, removed 46 selfloop flow, removed 1 redundant places. [2024-05-12 10:35:32,410 INFO L231 Difference]: Finished difference. Result has 191 places, 279 transitions, 4239 flow [2024-05-12 10:35:32,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3891, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4239, PETRI_PLACES=191, PETRI_TRANSITIONS=279} [2024-05-12 10:35:32,412 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 141 predicate places. [2024-05-12 10:35:32,412 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 279 transitions, 4239 flow [2024-05-12 10:35:32,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:32,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:32,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:32,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 10:35:32,412 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:32,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1918107258, now seen corresponding path program 1 times [2024-05-12 10:35:32,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:32,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538412711] [2024-05-12 10:35:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:32,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:32,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:32,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538412711] [2024-05-12 10:35:32,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538412711] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:32,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:32,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:32,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773404724] [2024-05-12 10:35:32,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:32,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:32,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:32,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:32,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 279 transitions, 4239 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:32,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:32,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:32,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:33,325 INFO L124 PetriNetUnfolderBase]: 3216/5330 cut-off events. [2024-05-12 10:35:33,326 INFO L125 PetriNetUnfolderBase]: For 130701/130713 co-relation queries the response was YES. [2024-05-12 10:35:33,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32208 conditions, 5330 events. 3216/5330 cut-off events. For 130701/130713 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35751 event pairs, 665 based on Foata normal form. 6/5298 useless extension candidates. Maximal degree in co-relation 32119. Up to 3596 conditions per place. [2024-05-12 10:35:33,381 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 130 selfloop transitions, 178 changer transitions 0/320 dead transitions. [2024-05-12 10:35:33,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 320 transitions, 5359 flow [2024-05-12 10:35:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:35:33,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:35:33,382 INFO L175 Difference]: Start difference. First operand has 191 places, 279 transitions, 4239 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:35:33,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 320 transitions, 5359 flow [2024-05-12 10:35:33,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 320 transitions, 5179 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:33,723 INFO L231 Difference]: Finished difference. Result has 195 places, 290 transitions, 4615 flow [2024-05-12 10:35:33,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4065, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4615, PETRI_PLACES=195, PETRI_TRANSITIONS=290} [2024-05-12 10:35:33,724 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 145 predicate places. [2024-05-12 10:35:33,724 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 290 transitions, 4615 flow [2024-05-12 10:35:33,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:33,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:33,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:33,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 10:35:33,724 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:33,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:33,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1484188328, now seen corresponding path program 2 times [2024-05-12 10:35:33,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:33,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095845894] [2024-05-12 10:35:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:33,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:33,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:33,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095845894] [2024-05-12 10:35:33,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095845894] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:33,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:33,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:33,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977697676] [2024-05-12 10:35:33,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:33,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:33,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:33,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:33,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:33,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:33,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 290 transitions, 4615 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:33,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:33,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:33,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:34,647 INFO L124 PetriNetUnfolderBase]: 3294/5346 cut-off events. [2024-05-12 10:35:34,647 INFO L125 PetriNetUnfolderBase]: For 137483/137483 co-relation queries the response was YES. [2024-05-12 10:35:34,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34087 conditions, 5346 events. 3294/5346 cut-off events. For 137483/137483 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 35291 event pairs, 508 based on Foata normal form. 2/5344 useless extension candidates. Maximal degree in co-relation 33997. Up to 4679 conditions per place. [2024-05-12 10:35:34,705 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 272 selfloop transitions, 50 changer transitions 0/334 dead transitions. [2024-05-12 10:35:34,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 334 transitions, 5821 flow [2024-05-12 10:35:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 10:35:34,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 10:35:34,707 INFO L175 Difference]: Start difference. First operand has 195 places, 290 transitions, 4615 flow. Second operand 8 states and 212 transitions. [2024-05-12 10:35:34,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 334 transitions, 5821 flow [2024-05-12 10:35:35,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 334 transitions, 5576 flow, removed 71 selfloop flow, removed 2 redundant places. [2024-05-12 10:35:35,030 INFO L231 Difference]: Finished difference. Result has 202 places, 304 transitions, 4839 flow [2024-05-12 10:35:35,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4412, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4839, PETRI_PLACES=202, PETRI_TRANSITIONS=304} [2024-05-12 10:35:35,031 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 152 predicate places. [2024-05-12 10:35:35,031 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 304 transitions, 4839 flow [2024-05-12 10:35:35,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:35,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:35,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:35,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 10:35:35,032 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:35,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:35,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1219499846, now seen corresponding path program 3 times [2024-05-12 10:35:35,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:35,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216469984] [2024-05-12 10:35:35,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:35,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:35,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:35,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216469984] [2024-05-12 10:35:35,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216469984] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:35,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:35,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:35,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587666643] [2024-05-12 10:35:35,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:35,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:35,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:35,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:35,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:35,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:35,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 304 transitions, 4839 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:35,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:35,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:35,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:35,956 INFO L124 PetriNetUnfolderBase]: 3313/5514 cut-off events. [2024-05-12 10:35:35,957 INFO L125 PetriNetUnfolderBase]: For 145152/145152 co-relation queries the response was YES. [2024-05-12 10:35:35,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33952 conditions, 5514 events. 3313/5514 cut-off events. For 145152/145152 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37248 event pairs, 567 based on Foata normal form. 3/5498 useless extension candidates. Maximal degree in co-relation 33859. Up to 4094 conditions per place. [2024-05-12 10:35:36,010 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 193 selfloop transitions, 146 changer transitions 0/351 dead transitions. [2024-05-12 10:35:36,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 351 transitions, 5971 flow [2024-05-12 10:35:36,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:36,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-05-12 10:35:36,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-05-12 10:35:36,012 INFO L175 Difference]: Start difference. First operand has 202 places, 304 transitions, 4839 flow. Second operand 8 states and 234 transitions. [2024-05-12 10:35:36,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 351 transitions, 5971 flow [2024-05-12 10:35:36,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 351 transitions, 5896 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:36,348 INFO L231 Difference]: Finished difference. Result has 207 places, 309 transitions, 5169 flow [2024-05-12 10:35:36,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4764, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5169, PETRI_PLACES=207, PETRI_TRANSITIONS=309} [2024-05-12 10:35:36,348 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 157 predicate places. [2024-05-12 10:35:36,349 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 309 transitions, 5169 flow [2024-05-12 10:35:36,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:36,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:36,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:36,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 10:35:36,349 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:36,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:36,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1957827049, now seen corresponding path program 1 times [2024-05-12 10:35:36,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:36,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684988814] [2024-05-12 10:35:36,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:36,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:36,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:36,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684988814] [2024-05-12 10:35:36,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684988814] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:36,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:36,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:36,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868502539] [2024-05-12 10:35:36,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:36,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:36,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:36,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:36,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:36,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:36,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 309 transitions, 5169 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:36,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:36,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:36,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:37,570 INFO L124 PetriNetUnfolderBase]: 3518/5722 cut-off events. [2024-05-12 10:35:37,571 INFO L125 PetriNetUnfolderBase]: For 169618/169620 co-relation queries the response was YES. [2024-05-12 10:35:37,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36396 conditions, 5722 events. 3518/5722 cut-off events. For 169618/169620 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 38190 event pairs, 446 based on Foata normal form. 12/5712 useless extension candidates. Maximal degree in co-relation 36301. Up to 4112 conditions per place. [2024-05-12 10:35:37,639 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 247 selfloop transitions, 104 changer transitions 0/363 dead transitions. [2024-05-12 10:35:37,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 363 transitions, 6445 flow [2024-05-12 10:35:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-05-12 10:35:37,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6677018633540373 [2024-05-12 10:35:37,641 INFO L175 Difference]: Start difference. First operand has 207 places, 309 transitions, 5169 flow. Second operand 7 states and 215 transitions. [2024-05-12 10:35:37,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 363 transitions, 6445 flow [2024-05-12 10:35:38,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 363 transitions, 6291 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:38,048 INFO L231 Difference]: Finished difference. Result has 211 places, 315 transitions, 5331 flow [2024-05-12 10:35:38,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5023, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5331, PETRI_PLACES=211, PETRI_TRANSITIONS=315} [2024-05-12 10:35:38,049 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 161 predicate places. [2024-05-12 10:35:38,049 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 315 transitions, 5331 flow [2024-05-12 10:35:38,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:38,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:38,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:38,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 10:35:38,049 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:38,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:38,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1135231561, now seen corresponding path program 2 times [2024-05-12 10:35:38,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:38,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466328232] [2024-05-12 10:35:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:38,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:38,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:38,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:38,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466328232] [2024-05-12 10:35:38,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466328232] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:38,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:38,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:38,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583159312] [2024-05-12 10:35:38,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:38,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:38,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:38,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:38,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:38,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:38,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 315 transitions, 5331 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:38,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:38,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:38,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:39,075 INFO L124 PetriNetUnfolderBase]: 3618/5873 cut-off events. [2024-05-12 10:35:39,075 INFO L125 PetriNetUnfolderBase]: For 172878/172880 co-relation queries the response was YES. [2024-05-12 10:35:39,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37900 conditions, 5873 events. 3618/5873 cut-off events. For 172878/172880 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 39436 event pairs, 640 based on Foata normal form. 12/5863 useless extension candidates. Maximal degree in co-relation 37803. Up to 4654 conditions per place. [2024-05-12 10:35:39,151 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 247 selfloop transitions, 99 changer transitions 0/358 dead transitions. [2024-05-12 10:35:39,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 358 transitions, 6441 flow [2024-05-12 10:35:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:39,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-05-12 10:35:39,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6459627329192547 [2024-05-12 10:35:39,153 INFO L175 Difference]: Start difference. First operand has 211 places, 315 transitions, 5331 flow. Second operand 7 states and 208 transitions. [2024-05-12 10:35:39,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 358 transitions, 6441 flow [2024-05-12 10:35:39,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 358 transitions, 6265 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:39,614 INFO L231 Difference]: Finished difference. Result has 215 places, 318 transitions, 5416 flow [2024-05-12 10:35:39,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5163, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5416, PETRI_PLACES=215, PETRI_TRANSITIONS=318} [2024-05-12 10:35:39,615 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 165 predicate places. [2024-05-12 10:35:39,615 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 318 transitions, 5416 flow [2024-05-12 10:35:39,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:39,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:39,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:39,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 10:35:39,616 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:39,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1839377041, now seen corresponding path program 1 times [2024-05-12 10:35:39,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:39,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685189312] [2024-05-12 10:35:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:39,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:39,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:39,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:39,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685189312] [2024-05-12 10:35:39,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685189312] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:39,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:39,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:39,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505678731] [2024-05-12 10:35:39,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:39,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:39,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:39,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:39,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:39,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:39,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 318 transitions, 5416 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:39,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:39,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:39,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:40,654 INFO L124 PetriNetUnfolderBase]: 3668/5958 cut-off events. [2024-05-12 10:35:40,654 INFO L125 PetriNetUnfolderBase]: For 171522/171524 co-relation queries the response was YES. [2024-05-12 10:35:40,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39039 conditions, 5958 events. 3668/5958 cut-off events. For 171522/171524 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 40139 event pairs, 709 based on Foata normal form. 2/5928 useless extension candidates. Maximal degree in co-relation 38940. Up to 4138 conditions per place. [2024-05-12 10:35:40,723 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 158 selfloop transitions, 191 changer transitions 0/361 dead transitions. [2024-05-12 10:35:40,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 361 transitions, 6655 flow [2024-05-12 10:35:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:35:40,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:35:40,738 INFO L175 Difference]: Start difference. First operand has 215 places, 318 transitions, 5416 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:35:40,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 361 transitions, 6655 flow [2024-05-12 10:35:41,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 361 transitions, 6442 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:41,183 INFO L231 Difference]: Finished difference. Result has 218 places, 328 transitions, 5829 flow [2024-05-12 10:35:41,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5829, PETRI_PLACES=218, PETRI_TRANSITIONS=328} [2024-05-12 10:35:41,185 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 168 predicate places. [2024-05-12 10:35:41,185 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 328 transitions, 5829 flow [2024-05-12 10:35:41,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:41,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:41,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:41,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 10:35:41,185 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:41,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:41,186 INFO L85 PathProgramCache]: Analyzing trace with hash 311976141, now seen corresponding path program 1 times [2024-05-12 10:35:41,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:41,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173246661] [2024-05-12 10:35:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:41,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:41,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:41,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:41,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173246661] [2024-05-12 10:35:41,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173246661] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:41,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:41,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:41,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809970569] [2024-05-12 10:35:41,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:41,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:41,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:41,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:41,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:41,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 328 transitions, 5829 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:41,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:41,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:41,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:42,278 INFO L124 PetriNetUnfolderBase]: 3690/5989 cut-off events. [2024-05-12 10:35:42,278 INFO L125 PetriNetUnfolderBase]: For 181355/181357 co-relation queries the response was YES. [2024-05-12 10:35:42,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40054 conditions, 5989 events. 3690/5989 cut-off events. For 181355/181357 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 40354 event pairs, 637 based on Foata normal form. 2/5969 useless extension candidates. Maximal degree in co-relation 39953. Up to 4842 conditions per place. [2024-05-12 10:35:42,351 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 257 selfloop transitions, 95 changer transitions 0/364 dead transitions. [2024-05-12 10:35:42,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 364 transitions, 6863 flow [2024-05-12 10:35:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-05-12 10:35:42,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6180124223602484 [2024-05-12 10:35:42,353 INFO L175 Difference]: Start difference. First operand has 218 places, 328 transitions, 5829 flow. Second operand 7 states and 199 transitions. [2024-05-12 10:35:42,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 364 transitions, 6863 flow [2024-05-12 10:35:42,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 364 transitions, 6606 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:42,854 INFO L231 Difference]: Finished difference. Result has 222 places, 332 transitions, 5843 flow [2024-05-12 10:35:42,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5576, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5843, PETRI_PLACES=222, PETRI_TRANSITIONS=332} [2024-05-12 10:35:42,855 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 172 predicate places. [2024-05-12 10:35:42,855 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 332 transitions, 5843 flow [2024-05-12 10:35:42,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:42,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:42,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:42,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 10:35:42,856 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:42,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:42,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1412492253, now seen corresponding path program 2 times [2024-05-12 10:35:42,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:42,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690324043] [2024-05-12 10:35:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:42,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:43,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:43,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690324043] [2024-05-12 10:35:43,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690324043] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:43,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:43,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:43,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152898226] [2024-05-12 10:35:43,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:43,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:43,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:43,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:43,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:43,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 332 transitions, 5843 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:43,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:43,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:43,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:43,984 INFO L124 PetriNetUnfolderBase]: 3712/6020 cut-off events. [2024-05-12 10:35:43,984 INFO L125 PetriNetUnfolderBase]: For 186932/186934 co-relation queries the response was YES. [2024-05-12 10:35:44,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39964 conditions, 6020 events. 3712/6020 cut-off events. For 186932/186934 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 40563 event pairs, 631 based on Foata normal form. 2/6002 useless extension candidates. Maximal degree in co-relation 39862. Up to 4862 conditions per place. [2024-05-12 10:35:44,055 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 263 selfloop transitions, 96 changer transitions 0/371 dead transitions. [2024-05-12 10:35:44,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 371 transitions, 7025 flow [2024-05-12 10:35:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:44,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 10:35:44,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-05-12 10:35:44,056 INFO L175 Difference]: Start difference. First operand has 222 places, 332 transitions, 5843 flow. Second operand 8 states and 221 transitions. [2024-05-12 10:35:44,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 371 transitions, 7025 flow [2024-05-12 10:35:44,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 371 transitions, 6803 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:44,485 INFO L231 Difference]: Finished difference. Result has 225 places, 338 transitions, 5930 flow [2024-05-12 10:35:44,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5930, PETRI_PLACES=225, PETRI_TRANSITIONS=338} [2024-05-12 10:35:44,485 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 175 predicate places. [2024-05-12 10:35:44,486 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 338 transitions, 5930 flow [2024-05-12 10:35:44,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:44,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:44,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:44,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 10:35:44,486 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:44,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1834735411, now seen corresponding path program 2 times [2024-05-12 10:35:44,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:44,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17840610] [2024-05-12 10:35:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:44,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:44,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:44,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17840610] [2024-05-12 10:35:44,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17840610] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:44,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:44,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:44,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884581945] [2024-05-12 10:35:44,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:44,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:44,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:44,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:44,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:44,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 338 transitions, 5930 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:44,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:44,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:44,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:45,545 INFO L124 PetriNetUnfolderBase]: 3734/6138 cut-off events. [2024-05-12 10:35:45,545 INFO L125 PetriNetUnfolderBase]: For 198760/198762 co-relation queries the response was YES. [2024-05-12 10:35:45,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40372 conditions, 6138 events. 3734/6138 cut-off events. For 198760/198762 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 41895 event pairs, 732 based on Foata normal form. 2/6088 useless extension candidates. Maximal degree in co-relation 40269. Up to 4174 conditions per place. [2024-05-12 10:35:45,618 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 173 selfloop transitions, 188 changer transitions 0/373 dead transitions. [2024-05-12 10:35:45,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 373 transitions, 7180 flow [2024-05-12 10:35:45,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:45,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:35:45,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:35:45,620 INFO L175 Difference]: Start difference. First operand has 225 places, 338 transitions, 5930 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:35:45,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 373 transitions, 7180 flow [2024-05-12 10:35:46,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 373 transitions, 7001 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:46,082 INFO L231 Difference]: Finished difference. Result has 228 places, 342 transitions, 6208 flow [2024-05-12 10:35:46,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5751, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6208, PETRI_PLACES=228, PETRI_TRANSITIONS=342} [2024-05-12 10:35:46,083 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 178 predicate places. [2024-05-12 10:35:46,083 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 342 transitions, 6208 flow [2024-05-12 10:35:46,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:46,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:46,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:46,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 10:35:46,083 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:46,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:46,084 INFO L85 PathProgramCache]: Analyzing trace with hash -839651893, now seen corresponding path program 3 times [2024-05-12 10:35:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:46,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992378665] [2024-05-12 10:35:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:46,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:46,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:46,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992378665] [2024-05-12 10:35:46,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992378665] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:46,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:46,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:46,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919055101] [2024-05-12 10:35:46,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:46,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:46,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:46,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:46,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:46,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:46,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 342 transitions, 6208 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:46,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:46,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:46,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:47,161 INFO L124 PetriNetUnfolderBase]: 3728/6131 cut-off events. [2024-05-12 10:35:47,161 INFO L125 PetriNetUnfolderBase]: For 207506/207508 co-relation queries the response was YES. [2024-05-12 10:35:47,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40914 conditions, 6131 events. 3728/6131 cut-off events. For 207506/207508 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 41885 event pairs, 728 based on Foata normal form. 2/6081 useless extension candidates. Maximal degree in co-relation 40809. Up to 4171 conditions per place. [2024-05-12 10:35:47,233 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 172 selfloop transitions, 188 changer transitions 0/372 dead transitions. [2024-05-12 10:35:47,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 372 transitions, 7290 flow [2024-05-12 10:35:47,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-05-12 10:35:47,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273291925465838 [2024-05-12 10:35:47,235 INFO L175 Difference]: Start difference. First operand has 228 places, 342 transitions, 6208 flow. Second operand 7 states and 202 transitions. [2024-05-12 10:35:47,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 372 transitions, 7290 flow [2024-05-12 10:35:47,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 372 transitions, 6925 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-05-12 10:35:47,674 INFO L231 Difference]: Finished difference. Result has 232 places, 342 transitions, 6229 flow [2024-05-12 10:35:47,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5843, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6229, PETRI_PLACES=232, PETRI_TRANSITIONS=342} [2024-05-12 10:35:47,674 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 182 predicate places. [2024-05-12 10:35:47,674 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 342 transitions, 6229 flow [2024-05-12 10:35:47,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:47,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:47,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:47,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 10:35:47,675 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:47,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:47,675 INFO L85 PathProgramCache]: Analyzing trace with hash -840012361, now seen corresponding path program 3 times [2024-05-12 10:35:47,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:47,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842894535] [2024-05-12 10:35:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:47,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:47,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:47,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842894535] [2024-05-12 10:35:47,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842894535] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:47,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:47,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:47,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147232925] [2024-05-12 10:35:47,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:47,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:47,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:47,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:47,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:47,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 342 transitions, 6229 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:47,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:47,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:47,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:48,794 INFO L124 PetriNetUnfolderBase]: 3828/6236 cut-off events. [2024-05-12 10:35:48,794 INFO L125 PetriNetUnfolderBase]: For 223753/223755 co-relation queries the response was YES. [2024-05-12 10:35:48,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41597 conditions, 6236 events. 3828/6236 cut-off events. For 223753/223755 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 42386 event pairs, 651 based on Foata normal form. 12/6215 useless extension candidates. Maximal degree in co-relation 41491. Up to 4932 conditions per place. [2024-05-12 10:35:48,871 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 267 selfloop transitions, 99 changer transitions 0/378 dead transitions. [2024-05-12 10:35:48,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 378 transitions, 7295 flow [2024-05-12 10:35:48,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:48,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-05-12 10:35:48,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6242236024844721 [2024-05-12 10:35:48,873 INFO L175 Difference]: Start difference. First operand has 232 places, 342 transitions, 6229 flow. Second operand 7 states and 201 transitions. [2024-05-12 10:35:48,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 378 transitions, 7295 flow [2024-05-12 10:35:49,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 378 transitions, 6945 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:49,407 INFO L231 Difference]: Finished difference. Result has 234 places, 345 transitions, 6138 flow [2024-05-12 10:35:49,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5879, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6138, PETRI_PLACES=234, PETRI_TRANSITIONS=345} [2024-05-12 10:35:49,407 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 184 predicate places. [2024-05-12 10:35:49,407 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 345 transitions, 6138 flow [2024-05-12 10:35:49,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:49,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:49,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:49,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 10:35:49,408 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:49,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1661999443, now seen corresponding path program 1 times [2024-05-12 10:35:49,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:49,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816633867] [2024-05-12 10:35:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:49,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:49,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:49,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:49,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816633867] [2024-05-12 10:35:49,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816633867] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:49,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:49,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:49,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369970040] [2024-05-12 10:35:49,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:49,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:49,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:49,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:49,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:49,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:49,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 345 transitions, 6138 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:49,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:49,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:49,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:50,555 INFO L124 PetriNetUnfolderBase]: 3846/6380 cut-off events. [2024-05-12 10:35:50,555 INFO L125 PetriNetUnfolderBase]: For 214970/214970 co-relation queries the response was YES. [2024-05-12 10:35:50,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41709 conditions, 6380 events. 3846/6380 cut-off events. For 214970/214970 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 44264 event pairs, 1208 based on Foata normal form. 2/6323 useless extension candidates. Maximal degree in co-relation 41602. Up to 5560 conditions per place. [2024-05-12 10:35:50,633 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 336 selfloop transitions, 27 changer transitions 0/375 dead transitions. [2024-05-12 10:35:50,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 375 transitions, 6976 flow [2024-05-12 10:35:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:50,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-05-12 10:35:50,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745341614906833 [2024-05-12 10:35:50,634 INFO L175 Difference]: Start difference. First operand has 234 places, 345 transitions, 6138 flow. Second operand 7 states and 185 transitions. [2024-05-12 10:35:50,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 375 transitions, 6976 flow [2024-05-12 10:35:51,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 375 transitions, 6766 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 10:35:51,129 INFO L231 Difference]: Finished difference. Result has 237 places, 347 transitions, 6039 flow [2024-05-12 10:35:51,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5928, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6039, PETRI_PLACES=237, PETRI_TRANSITIONS=347} [2024-05-12 10:35:51,130 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 187 predicate places. [2024-05-12 10:35:51,130 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 347 transitions, 6039 flow [2024-05-12 10:35:51,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:51,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:51,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:51,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 10:35:51,131 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:51,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:51,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1740667721, now seen corresponding path program 3 times [2024-05-12 10:35:51,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:51,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996526407] [2024-05-12 10:35:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:51,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:51,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:51,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996526407] [2024-05-12 10:35:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996526407] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:51,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:51,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:51,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032694700] [2024-05-12 10:35:51,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:51,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:51,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:51,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:51,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 347 transitions, 6039 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:51,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:51,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:51,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:52,332 INFO L124 PetriNetUnfolderBase]: 3843/6240 cut-off events. [2024-05-12 10:35:52,332 INFO L125 PetriNetUnfolderBase]: For 215869/215881 co-relation queries the response was YES. [2024-05-12 10:35:52,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41054 conditions, 6240 events. 3843/6240 cut-off events. For 215869/215881 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 42303 event pairs, 654 based on Foata normal form. 4/6203 useless extension candidates. Maximal degree in co-relation 40946. Up to 5056 conditions per place. [2024-05-12 10:35:52,408 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 261 selfloop transitions, 103 changer transitions 0/376 dead transitions. [2024-05-12 10:35:52,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 376 transitions, 7041 flow [2024-05-12 10:35:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:52,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:35:52,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055900621118012 [2024-05-12 10:35:52,409 INFO L175 Difference]: Start difference. First operand has 237 places, 347 transitions, 6039 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:35:52,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 376 transitions, 7041 flow [2024-05-12 10:35:52,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 376 transitions, 6938 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:52,955 INFO L231 Difference]: Finished difference. Result has 239 places, 347 transitions, 6148 flow [2024-05-12 10:35:52,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5936, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6148, PETRI_PLACES=239, PETRI_TRANSITIONS=347} [2024-05-12 10:35:52,955 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 189 predicate places. [2024-05-12 10:35:52,956 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 347 transitions, 6148 flow [2024-05-12 10:35:52,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:52,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:52,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:52,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 10:35:52,956 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:52,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:52,957 INFO L85 PathProgramCache]: Analyzing trace with hash 880289135, now seen corresponding path program 4 times [2024-05-12 10:35:52,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:52,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812877047] [2024-05-12 10:35:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:52,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:53,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:53,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812877047] [2024-05-12 10:35:53,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812877047] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:53,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:53,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:53,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714710942] [2024-05-12 10:35:53,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:53,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:53,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:53,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:53,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:53,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:53,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 347 transitions, 6148 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:53,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:53,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:53,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:54,040 INFO L124 PetriNetUnfolderBase]: 3833/6287 cut-off events. [2024-05-12 10:35:54,041 INFO L125 PetriNetUnfolderBase]: For 226930/226942 co-relation queries the response was YES. [2024-05-12 10:35:54,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41396 conditions, 6287 events. 3833/6287 cut-off events. For 226930/226942 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43093 event pairs, 765 based on Foata normal form. 5/6239 useless extension candidates. Maximal degree in co-relation 41287. Up to 4336 conditions per place. [2024-05-12 10:35:54,122 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 156 selfloop transitions, 209 changer transitions 0/377 dead transitions. [2024-05-12 10:35:54,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 377 transitions, 7264 flow [2024-05-12 10:35:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:54,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:54,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:35:54,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-05-12 10:35:54,123 INFO L175 Difference]: Start difference. First operand has 239 places, 347 transitions, 6148 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:35:54,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 377 transitions, 7264 flow [2024-05-12 10:35:54,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 377 transitions, 7022 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-05-12 10:35:54,645 INFO L231 Difference]: Finished difference. Result has 241 places, 347 transitions, 6331 flow [2024-05-12 10:35:54,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5906, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6331, PETRI_PLACES=241, PETRI_TRANSITIONS=347} [2024-05-12 10:35:54,646 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 191 predicate places. [2024-05-12 10:35:54,646 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 347 transitions, 6331 flow [2024-05-12 10:35:54,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:54,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:54,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:54,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 10:35:54,646 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:54,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:54,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1501458701, now seen corresponding path program 4 times [2024-05-12 10:35:54,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:54,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333845757] [2024-05-12 10:35:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:54,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:54,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:54,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:54,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:54,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333845757] [2024-05-12 10:35:54,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333845757] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:54,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:54,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:54,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841489289] [2024-05-12 10:35:54,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:54,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:54,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:54,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:54,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:54,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:54,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 347 transitions, 6331 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:54,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:54,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:54,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:55,764 INFO L124 PetriNetUnfolderBase]: 3830/6234 cut-off events. [2024-05-12 10:35:55,765 INFO L125 PetriNetUnfolderBase]: For 229972/229984 co-relation queries the response was YES. [2024-05-12 10:35:55,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41921 conditions, 6234 events. 3830/6234 cut-off events. For 229972/229984 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 42365 event pairs, 654 based on Foata normal form. 4/6201 useless extension candidates. Maximal degree in co-relation 41811. Up to 5040 conditions per place. [2024-05-12 10:35:55,840 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 256 selfloop transitions, 107 changer transitions 0/375 dead transitions. [2024-05-12 10:35:55,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 375 transitions, 7229 flow [2024-05-12 10:35:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:35:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:35:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-05-12 10:35:55,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6086956521739131 [2024-05-12 10:35:55,841 INFO L175 Difference]: Start difference. First operand has 241 places, 347 transitions, 6331 flow. Second operand 7 states and 196 transitions. [2024-05-12 10:35:55,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 375 transitions, 7229 flow [2024-05-12 10:35:56,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 375 transitions, 6285 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-05-12 10:35:56,374 INFO L231 Difference]: Finished difference. Result has 235 places, 347 transitions, 5607 flow [2024-05-12 10:35:56,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5387, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5607, PETRI_PLACES=235, PETRI_TRANSITIONS=347} [2024-05-12 10:35:56,374 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 185 predicate places. [2024-05-12 10:35:56,375 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 347 transitions, 5607 flow [2024-05-12 10:35:56,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:56,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:56,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:56,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 10:35:56,375 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:56,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1386404495, now seen corresponding path program 5 times [2024-05-12 10:35:56,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:56,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923521176] [2024-05-12 10:35:56,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:56,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:56,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:56,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923521176] [2024-05-12 10:35:56,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923521176] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:56,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:56,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:56,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168622057] [2024-05-12 10:35:56,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:56,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:56,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:56,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:56,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:56,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 347 transitions, 5607 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:56,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:56,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:56,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:57,464 INFO L124 PetriNetUnfolderBase]: 3824/6249 cut-off events. [2024-05-12 10:35:57,465 INFO L125 PetriNetUnfolderBase]: For 218071/218071 co-relation queries the response was YES. [2024-05-12 10:35:57,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40393 conditions, 6249 events. 3824/6249 cut-off events. For 218071/218071 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 42511 event pairs, 1075 based on Foata normal form. 2/6230 useless extension candidates. Maximal degree in co-relation 40284. Up to 5453 conditions per place. [2024-05-12 10:35:57,546 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 315 selfloop transitions, 50 changer transitions 0/377 dead transitions. [2024-05-12 10:35:57,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 377 transitions, 6634 flow [2024-05-12 10:35:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 10:35:57,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 10:35:57,547 INFO L175 Difference]: Start difference. First operand has 235 places, 347 transitions, 5607 flow. Second operand 8 states and 212 transitions. [2024-05-12 10:35:57,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 377 transitions, 6634 flow [2024-05-12 10:35:58,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 377 transitions, 6373 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:58,165 INFO L231 Difference]: Finished difference. Result has 237 places, 347 transitions, 5459 flow [2024-05-12 10:35:58,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5352, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5459, PETRI_PLACES=237, PETRI_TRANSITIONS=347} [2024-05-12 10:35:58,166 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 187 predicate places. [2024-05-12 10:35:58,166 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 347 transitions, 5459 flow [2024-05-12 10:35:58,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:58,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:58,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:58,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 10:35:58,167 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:58,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:58,167 INFO L85 PathProgramCache]: Analyzing trace with hash 849960525, now seen corresponding path program 6 times [2024-05-12 10:35:58,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:58,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152191702] [2024-05-12 10:35:58,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:58,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:35:58,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:35:58,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:35:58,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152191702] [2024-05-12 10:35:58,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152191702] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:35:58,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:35:58,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:35:58,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500560226] [2024-05-12 10:35:58,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:35:58,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:35:58,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:35:58,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:35:58,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:35:58,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:35:58,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 347 transitions, 5459 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:58,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:35:58,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:35:58,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:35:59,270 INFO L124 PetriNetUnfolderBase]: 3816/6133 cut-off events. [2024-05-12 10:35:59,271 INFO L125 PetriNetUnfolderBase]: For 208701/208701 co-relation queries the response was YES. [2024-05-12 10:35:59,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39494 conditions, 6133 events. 3816/6133 cut-off events. For 208701/208701 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41000 event pairs, 571 based on Foata normal form. 2/6131 useless extension candidates. Maximal degree in co-relation 39384. Up to 4824 conditions per place. [2024-05-12 10:35:59,345 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 232 selfloop transitions, 145 changer transitions 0/389 dead transitions. [2024-05-12 10:35:59,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 389 transitions, 6641 flow [2024-05-12 10:35:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:35:59,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:35:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-05-12 10:35:59,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331521739130435 [2024-05-12 10:35:59,346 INFO L175 Difference]: Start difference. First operand has 237 places, 347 transitions, 5459 flow. Second operand 8 states and 233 transitions. [2024-05-12 10:35:59,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 389 transitions, 6641 flow [2024-05-12 10:35:59,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 389 transitions, 6513 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 10:35:59,945 INFO L231 Difference]: Finished difference. Result has 239 places, 347 transitions, 5633 flow [2024-05-12 10:35:59,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5331, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5633, PETRI_PLACES=239, PETRI_TRANSITIONS=347} [2024-05-12 10:35:59,946 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 189 predicate places. [2024-05-12 10:35:59,946 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 347 transitions, 5633 flow [2024-05-12 10:35:59,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:35:59,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:35:59,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:35:59,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 10:35:59,947 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:35:59,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:35:59,947 INFO L85 PathProgramCache]: Analyzing trace with hash 672835515, now seen corresponding path program 7 times [2024-05-12 10:35:59,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:35:59,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596911976] [2024-05-12 10:35:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:35:59,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:35:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:00,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:00,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596911976] [2024-05-12 10:36:00,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596911976] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:00,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:00,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:00,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374360987] [2024-05-12 10:36:00,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:00,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:00,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:00,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:00,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:00,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:00,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 347 transitions, 5633 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:00,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:00,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:00,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:01,095 INFO L124 PetriNetUnfolderBase]: 3838/6187 cut-off events. [2024-05-12 10:36:01,096 INFO L125 PetriNetUnfolderBase]: For 218910/218912 co-relation queries the response was YES. [2024-05-12 10:36:01,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40537 conditions, 6187 events. 3838/6187 cut-off events. For 218910/218912 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 41636 event pairs, 588 based on Foata normal form. 4/6181 useless extension candidates. Maximal degree in co-relation 40426. Up to 4836 conditions per place. [2024-05-12 10:36:01,173 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 242 selfloop transitions, 130 changer transitions 0/384 dead transitions. [2024-05-12 10:36:01,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 384 transitions, 6870 flow [2024-05-12 10:36:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:01,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:01,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-05-12 10:36:01,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304347826086957 [2024-05-12 10:36:01,175 INFO L175 Difference]: Start difference. First operand has 239 places, 347 transitions, 5633 flow. Second operand 7 states and 203 transitions. [2024-05-12 10:36:01,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 384 transitions, 6870 flow [2024-05-12 10:36:01,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 384 transitions, 6655 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:01,839 INFO L231 Difference]: Finished difference. Result has 241 places, 351 transitions, 5776 flow [2024-05-12 10:36:01,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5776, PETRI_PLACES=241, PETRI_TRANSITIONS=351} [2024-05-12 10:36:01,840 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 191 predicate places. [2024-05-12 10:36:01,840 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 351 transitions, 5776 flow [2024-05-12 10:36:01,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:01,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:01,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:01,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 10:36:01,840 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:01,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:01,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1904983877, now seen corresponding path program 8 times [2024-05-12 10:36:01,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:01,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90739872] [2024-05-12 10:36:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:01,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:01,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:02,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:02,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90739872] [2024-05-12 10:36:02,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90739872] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:02,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:02,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:02,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918401388] [2024-05-12 10:36:02,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:02,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:02,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:02,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:02,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:02,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 351 transitions, 5776 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:02,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:02,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:02,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:02,985 INFO L124 PetriNetUnfolderBase]: 3830/6233 cut-off events. [2024-05-12 10:36:02,985 INFO L125 PetriNetUnfolderBase]: For 222452/222454 co-relation queries the response was YES. [2024-05-12 10:36:03,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40383 conditions, 6233 events. 3830/6233 cut-off events. For 222452/222454 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 42435 event pairs, 630 based on Foata normal form. 4/6209 useless extension candidates. Maximal degree in co-relation 40272. Up to 4831 conditions per place. [2024-05-12 10:36:03,070 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 238 selfloop transitions, 136 changer transitions 0/386 dead transitions. [2024-05-12 10:36:03,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 386 transitions, 6830 flow [2024-05-12 10:36:03,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:03,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-05-12 10:36:03,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366459627329193 [2024-05-12 10:36:03,072 INFO L175 Difference]: Start difference. First operand has 241 places, 351 transitions, 5776 flow. Second operand 7 states and 205 transitions. [2024-05-12 10:36:03,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 386 transitions, 6830 flow [2024-05-12 10:36:03,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 386 transitions, 6556 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:03,785 INFO L231 Difference]: Finished difference. Result has 244 places, 351 transitions, 5781 flow [2024-05-12 10:36:03,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5502, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5781, PETRI_PLACES=244, PETRI_TRANSITIONS=351} [2024-05-12 10:36:03,786 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-05-12 10:36:03,786 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 351 transitions, 5781 flow [2024-05-12 10:36:03,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:03,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:03,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:03,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 10:36:03,787 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:03,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:03,787 INFO L85 PathProgramCache]: Analyzing trace with hash -581280905, now seen corresponding path program 4 times [2024-05-12 10:36:03,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:03,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776147503] [2024-05-12 10:36:03,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:03,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:04,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:04,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:04,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776147503] [2024-05-12 10:36:04,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776147503] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:04,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:04,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:04,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399027524] [2024-05-12 10:36:04,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:04,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:04,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:04,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:04,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 351 transitions, 5781 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:04,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:04,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:04,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:05,124 INFO L124 PetriNetUnfolderBase]: 4190/6788 cut-off events. [2024-05-12 10:36:05,124 INFO L125 PetriNetUnfolderBase]: For 311628/311630 co-relation queries the response was YES. [2024-05-12 10:36:05,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42567 conditions, 6788 events. 4190/6788 cut-off events. For 311628/311630 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 46652 event pairs, 507 based on Foata normal form. 56/6829 useless extension candidates. Maximal degree in co-relation 42455. Up to 4914 conditions per place. [2024-05-12 10:36:05,206 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 280 selfloop transitions, 108 changer transitions 0/400 dead transitions. [2024-05-12 10:36:05,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 400 transitions, 6855 flow [2024-05-12 10:36:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:05,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 217 transitions. [2024-05-12 10:36:05,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6739130434782609 [2024-05-12 10:36:05,208 INFO L175 Difference]: Start difference. First operand has 244 places, 351 transitions, 5781 flow. Second operand 7 states and 217 transitions. [2024-05-12 10:36:05,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 400 transitions, 6855 flow [2024-05-12 10:36:05,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 400 transitions, 6341 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-05-12 10:36:05,719 INFO L231 Difference]: Finished difference. Result has 241 places, 354 transitions, 5560 flow [2024-05-12 10:36:05,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5267, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5560, PETRI_PLACES=241, PETRI_TRANSITIONS=354} [2024-05-12 10:36:05,720 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 191 predicate places. [2024-05-12 10:36:05,720 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 354 transitions, 5560 flow [2024-05-12 10:36:05,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:05,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:05,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:05,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 10:36:05,721 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:05,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:05,721 INFO L85 PathProgramCache]: Analyzing trace with hash 673075083, now seen corresponding path program 2 times [2024-05-12 10:36:05,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:05,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57602424] [2024-05-12 10:36:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:05,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:05,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:05,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57602424] [2024-05-12 10:36:05,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57602424] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:05,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:05,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:05,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544050158] [2024-05-12 10:36:05,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:05,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:05,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:05,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:05,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:05,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:05,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 354 transitions, 5560 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:05,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:05,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:05,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:07,004 INFO L124 PetriNetUnfolderBase]: 4208/6794 cut-off events. [2024-05-12 10:36:07,004 INFO L125 PetriNetUnfolderBase]: For 227154/227154 co-relation queries the response was YES. [2024-05-12 10:36:07,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42926 conditions, 6794 events. 4208/6794 cut-off events. For 227154/227154 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 46550 event pairs, 865 based on Foata normal form. 2/6785 useless extension candidates. Maximal degree in co-relation 42813. Up to 6134 conditions per place. [2024-05-12 10:36:07,089 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 347 selfloop transitions, 22 changer transitions 0/381 dead transitions. [2024-05-12 10:36:07,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 381 transitions, 6408 flow [2024-05-12 10:36:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:07,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:07,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-05-12 10:36:07,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5905797101449275 [2024-05-12 10:36:07,090 INFO L175 Difference]: Start difference. First operand has 241 places, 354 transitions, 5560 flow. Second operand 6 states and 163 transitions. [2024-05-12 10:36:07,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 381 transitions, 6408 flow [2024-05-12 10:36:07,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 381 transitions, 6191 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:07,931 INFO L231 Difference]: Finished difference. Result has 243 places, 356 transitions, 5448 flow [2024-05-12 10:36:07,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5345, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5448, PETRI_PLACES=243, PETRI_TRANSITIONS=356} [2024-05-12 10:36:07,932 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 193 predicate places. [2024-05-12 10:36:07,932 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 356 transitions, 5448 flow [2024-05-12 10:36:07,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:07,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:07,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:07,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 10:36:07,932 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:07,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:07,932 INFO L85 PathProgramCache]: Analyzing trace with hash -569293019, now seen corresponding path program 3 times [2024-05-12 10:36:07,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:07,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405632948] [2024-05-12 10:36:07,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:07,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:08,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:08,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405632948] [2024-05-12 10:36:08,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405632948] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:08,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:08,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:08,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153615918] [2024-05-12 10:36:08,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:08,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:08,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:08,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:08,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:08,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:08,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 356 transitions, 5448 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:08,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:08,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:08,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:09,206 INFO L124 PetriNetUnfolderBase]: 4226/6944 cut-off events. [2024-05-12 10:36:09,206 INFO L125 PetriNetUnfolderBase]: For 226132/226132 co-relation queries the response was YES. [2024-05-12 10:36:09,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42319 conditions, 6944 events. 4226/6944 cut-off events. For 226132/226132 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 48504 event pairs, 1428 based on Foata normal form. 2/6883 useless extension candidates. Maximal degree in co-relation 42205. Up to 6167 conditions per place. [2024-05-12 10:36:09,309 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 349 selfloop transitions, 19 changer transitions 0/380 dead transitions. [2024-05-12 10:36:09,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 380 transitions, 6290 flow [2024-05-12 10:36:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:09,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-05-12 10:36:09,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130434782608696 [2024-05-12 10:36:09,310 INFO L175 Difference]: Start difference. First operand has 243 places, 356 transitions, 5448 flow. Second operand 5 states and 141 transitions. [2024-05-12 10:36:09,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 380 transitions, 6290 flow [2024-05-12 10:36:09,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 380 transitions, 6199 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:09,919 INFO L231 Difference]: Finished difference. Result has 244 places, 358 transitions, 5458 flow [2024-05-12 10:36:09,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5458, PETRI_PLACES=244, PETRI_TRANSITIONS=358} [2024-05-12 10:36:09,920 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 194 predicate places. [2024-05-12 10:36:09,920 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 358 transitions, 5458 flow [2024-05-12 10:36:09,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:09,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:09,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:09,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 10:36:09,920 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:09,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1086857193, now seen corresponding path program 4 times [2024-05-12 10:36:09,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:09,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601759540] [2024-05-12 10:36:09,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:09,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:10,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:10,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601759540] [2024-05-12 10:36:10,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601759540] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:10,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:10,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:10,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626934036] [2024-05-12 10:36:10,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:10,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:10,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:10,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:10,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 358 transitions, 5458 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:10,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:10,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:10,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:11,183 INFO L124 PetriNetUnfolderBase]: 4221/6763 cut-off events. [2024-05-12 10:36:11,183 INFO L125 PetriNetUnfolderBase]: For 224948/224948 co-relation queries the response was YES. [2024-05-12 10:36:11,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41943 conditions, 6763 events. 4221/6763 cut-off events. For 224948/224948 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 45944 event pairs, 663 based on Foata normal form. 2/6761 useless extension candidates. Maximal degree in co-relation 41828. Up to 6128 conditions per place. [2024-05-12 10:36:11,261 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 351 selfloop transitions, 23 changer transitions 0/386 dead transitions. [2024-05-12 10:36:11,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 386 transitions, 6324 flow [2024-05-12 10:36:11,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:11,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:11,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-05-12 10:36:11,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942028985507246 [2024-05-12 10:36:11,262 INFO L175 Difference]: Start difference. First operand has 244 places, 358 transitions, 5458 flow. Second operand 6 states and 164 transitions. [2024-05-12 10:36:11,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 386 transitions, 6324 flow [2024-05-12 10:36:11,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 386 transitions, 6239 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:11,855 INFO L231 Difference]: Finished difference. Result has 247 places, 360 transitions, 5486 flow [2024-05-12 10:36:11,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5373, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5486, PETRI_PLACES=247, PETRI_TRANSITIONS=360} [2024-05-12 10:36:11,856 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 197 predicate places. [2024-05-12 10:36:11,856 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 360 transitions, 5486 flow [2024-05-12 10:36:11,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:11,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:11,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:11,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 10:36:11,856 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:11,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:11,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1116649937, now seen corresponding path program 1 times [2024-05-12 10:36:11,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:11,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344048810] [2024-05-12 10:36:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:12,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:12,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344048810] [2024-05-12 10:36:12,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344048810] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:12,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:12,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:12,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137219802] [2024-05-12 10:36:12,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:12,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:12,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:12,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:12,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:12,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:12,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 360 transitions, 5486 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:12,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:12,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:12,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:13,150 INFO L124 PetriNetUnfolderBase]: 4426/7158 cut-off events. [2024-05-12 10:36:13,151 INFO L125 PetriNetUnfolderBase]: For 276204/276216 co-relation queries the response was YES. [2024-05-12 10:36:13,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43989 conditions, 7158 events. 4426/7158 cut-off events. For 276204/276216 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 49608 event pairs, 656 based on Foata normal form. 15/7134 useless extension candidates. Maximal degree in co-relation 43873. Up to 5452 conditions per place. [2024-05-12 10:36:13,244 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 279 selfloop transitions, 115 changer transitions 0/406 dead transitions. [2024-05-12 10:36:13,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 406 transitions, 6728 flow [2024-05-12 10:36:13,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 207 transitions. [2024-05-12 10:36:13,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-05-12 10:36:13,245 INFO L175 Difference]: Start difference. First operand has 247 places, 360 transitions, 5486 flow. Second operand 7 states and 207 transitions. [2024-05-12 10:36:13,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 406 transitions, 6728 flow [2024-05-12 10:36:13,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 406 transitions, 6631 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:13,900 INFO L231 Difference]: Finished difference. Result has 250 places, 366 transitions, 5731 flow [2024-05-12 10:36:13,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5389, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5731, PETRI_PLACES=250, PETRI_TRANSITIONS=366} [2024-05-12 10:36:13,901 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 200 predicate places. [2024-05-12 10:36:13,901 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 366 transitions, 5731 flow [2024-05-12 10:36:13,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:13,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:13,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:13,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 10:36:13,901 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:13,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1119506897, now seen corresponding path program 2 times [2024-05-12 10:36:13,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:13,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330253150] [2024-05-12 10:36:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:13,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:14,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:14,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330253150] [2024-05-12 10:36:14,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330253150] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:14,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:14,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:14,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684760627] [2024-05-12 10:36:14,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:14,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:14,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:14,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:14,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 366 transitions, 5731 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:14,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:14,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:14,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:15,242 INFO L124 PetriNetUnfolderBase]: 4526/7295 cut-off events. [2024-05-12 10:36:15,243 INFO L125 PetriNetUnfolderBase]: For 287123/287135 co-relation queries the response was YES. [2024-05-12 10:36:15,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45603 conditions, 7295 events. 4526/7295 cut-off events. For 287123/287135 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 50513 event pairs, 804 based on Foata normal form. 15/7274 useless extension candidates. Maximal degree in co-relation 45486. Up to 5992 conditions per place. [2024-05-12 10:36:15,345 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 279 selfloop transitions, 110 changer transitions 0/401 dead transitions. [2024-05-12 10:36:15,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 401 transitions, 6771 flow [2024-05-12 10:36:15,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:15,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-05-12 10:36:15,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6211180124223602 [2024-05-12 10:36:15,347 INFO L175 Difference]: Start difference. First operand has 250 places, 366 transitions, 5731 flow. Second operand 7 states and 200 transitions. [2024-05-12 10:36:15,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 401 transitions, 6771 flow [2024-05-12 10:36:16,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 401 transitions, 6555 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:16,056 INFO L231 Difference]: Finished difference. Result has 254 places, 369 transitions, 5804 flow [2024-05-12 10:36:16,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5529, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5804, PETRI_PLACES=254, PETRI_TRANSITIONS=369} [2024-05-12 10:36:16,057 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 204 predicate places. [2024-05-12 10:36:16,057 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 369 transitions, 5804 flow [2024-05-12 10:36:16,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:16,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:16,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:16,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 10:36:16,057 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:16,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:16,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1234798067, now seen corresponding path program 3 times [2024-05-12 10:36:16,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:16,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43487716] [2024-05-12 10:36:16,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:16,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:16,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43487716] [2024-05-12 10:36:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43487716] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:16,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:16,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:16,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703572039] [2024-05-12 10:36:16,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:16,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:16,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:16,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:16,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 369 transitions, 5804 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:16,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:16,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:16,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:17,391 INFO L124 PetriNetUnfolderBase]: 4690/7470 cut-off events. [2024-05-12 10:36:17,391 INFO L125 PetriNetUnfolderBase]: For 306556/306556 co-relation queries the response was YES. [2024-05-12 10:36:17,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47258 conditions, 7470 events. 4690/7470 cut-off events. For 306556/306556 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 51273 event pairs, 738 based on Foata normal form. 20/7486 useless extension candidates. Maximal degree in co-relation 47139. Up to 6629 conditions per place. [2024-05-12 10:36:17,496 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 352 selfloop transitions, 42 changer transitions 0/406 dead transitions. [2024-05-12 10:36:17,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 406 transitions, 6784 flow [2024-05-12 10:36:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:17,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 10:36:17,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 10:36:17,499 INFO L175 Difference]: Start difference. First operand has 254 places, 369 transitions, 5804 flow. Second operand 8 states and 213 transitions. [2024-05-12 10:36:17,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 406 transitions, 6784 flow [2024-05-12 10:36:18,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 406 transitions, 6575 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:18,209 INFO L231 Difference]: Finished difference. Result has 258 places, 374 transitions, 5795 flow [2024-05-12 10:36:18,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5597, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5795, PETRI_PLACES=258, PETRI_TRANSITIONS=374} [2024-05-12 10:36:18,210 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 208 predicate places. [2024-05-12 10:36:18,210 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 374 transitions, 5795 flow [2024-05-12 10:36:18,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:18,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:18,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:18,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 10:36:18,211 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:18,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:18,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1234982765, now seen corresponding path program 1 times [2024-05-12 10:36:18,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:18,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497288537] [2024-05-12 10:36:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:18,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:18,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:18,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:18,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497288537] [2024-05-12 10:36:18,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497288537] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:18,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:18,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:18,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915018200] [2024-05-12 10:36:18,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:18,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:18,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:18,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:18,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:18,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:18,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 374 transitions, 5795 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:18,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:18,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:18,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:19,531 INFO L124 PetriNetUnfolderBase]: 4708/7492 cut-off events. [2024-05-12 10:36:19,532 INFO L125 PetriNetUnfolderBase]: For 279563/279563 co-relation queries the response was YES. [2024-05-12 10:36:19,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47318 conditions, 7492 events. 4708/7492 cut-off events. For 279563/279563 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 51452 event pairs, 738 based on Foata normal form. 2/7490 useless extension candidates. Maximal degree in co-relation 47198. Up to 6869 conditions per place. [2024-05-12 10:36:19,638 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 366 selfloop transitions, 24 changer transitions 0/402 dead transitions. [2024-05-12 10:36:19,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 402 transitions, 6677 flow [2024-05-12 10:36:19,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:19,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 10:36:19,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:36:19,639 INFO L175 Difference]: Start difference. First operand has 258 places, 374 transitions, 5795 flow. Second operand 7 states and 182 transitions. [2024-05-12 10:36:19,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 402 transitions, 6677 flow [2024-05-12 10:36:20,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 402 transitions, 6532 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-05-12 10:36:20,441 INFO L231 Difference]: Finished difference. Result has 259 places, 377 transitions, 5759 flow [2024-05-12 10:36:20,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5759, PETRI_PLACES=259, PETRI_TRANSITIONS=377} [2024-05-12 10:36:20,442 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 209 predicate places. [2024-05-12 10:36:20,442 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 377 transitions, 5759 flow [2024-05-12 10:36:20,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:20,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:20,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:20,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 10:36:20,443 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:20,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 850206417, now seen corresponding path program 4 times [2024-05-12 10:36:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:20,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101553893] [2024-05-12 10:36:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:20,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:20,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:20,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101553893] [2024-05-12 10:36:20,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101553893] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:20,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:20,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:20,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300870846] [2024-05-12 10:36:20,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:20,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:20,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:20,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:20,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:20,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 377 transitions, 5759 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:20,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:20,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:20,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:21,986 INFO L124 PetriNetUnfolderBase]: 5091/8184 cut-off events. [2024-05-12 10:36:21,986 INFO L125 PetriNetUnfolderBase]: For 395288/395288 co-relation queries the response was YES. [2024-05-12 10:36:22,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49511 conditions, 8184 events. 5091/8184 cut-off events. For 395288/395288 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 57509 event pairs, 736 based on Foata normal form. 54/8231 useless extension candidates. Maximal degree in co-relation 49389. Up to 6109 conditions per place. [2024-05-12 10:36:22,090 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 300 selfloop transitions, 118 changer transitions 0/430 dead transitions. [2024-05-12 10:36:22,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 430 transitions, 6949 flow [2024-05-12 10:36:22,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 240 transitions. [2024-05-12 10:36:22,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:36:22,091 INFO L175 Difference]: Start difference. First operand has 259 places, 377 transitions, 5759 flow. Second operand 8 states and 240 transitions. [2024-05-12 10:36:22,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 430 transitions, 6949 flow [2024-05-12 10:36:22,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 430 transitions, 6872 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:22,882 INFO L231 Difference]: Finished difference. Result has 263 places, 381 transitions, 6041 flow [2024-05-12 10:36:22,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5682, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6041, PETRI_PLACES=263, PETRI_TRANSITIONS=381} [2024-05-12 10:36:22,882 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 213 predicate places. [2024-05-12 10:36:22,882 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 381 transitions, 6041 flow [2024-05-12 10:36:22,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:22,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:22,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:22,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 10:36:22,883 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:22,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:22,883 INFO L85 PathProgramCache]: Analyzing trace with hash 2143211183, now seen corresponding path program 2 times [2024-05-12 10:36:22,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:22,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818492198] [2024-05-12 10:36:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:22,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:23,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:23,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818492198] [2024-05-12 10:36:23,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818492198] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:23,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:23,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:23,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621177924] [2024-05-12 10:36:23,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:23,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:23,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:23,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:23,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:23,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 381 transitions, 6041 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:23,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:23,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:23,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:24,380 INFO L124 PetriNetUnfolderBase]: 5120/8258 cut-off events. [2024-05-12 10:36:24,380 INFO L125 PetriNetUnfolderBase]: For 304320/304320 co-relation queries the response was YES. [2024-05-12 10:36:24,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51215 conditions, 8258 events. 5120/8258 cut-off events. For 304320/304320 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 58400 event pairs, 1797 based on Foata normal form. 2/8205 useless extension candidates. Maximal degree in co-relation 51092. Up to 7482 conditions per place. [2024-05-12 10:36:24,664 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 367 selfloop transitions, 29 changer transitions 0/408 dead transitions. [2024-05-12 10:36:24,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 408 transitions, 6973 flow [2024-05-12 10:36:24,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-05-12 10:36:24,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2024-05-12 10:36:24,665 INFO L175 Difference]: Start difference. First operand has 263 places, 381 transitions, 6041 flow. Second operand 6 states and 160 transitions. [2024-05-12 10:36:24,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 408 transitions, 6973 flow [2024-05-12 10:36:25,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 408 transitions, 6727 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:25,307 INFO L231 Difference]: Finished difference. Result has 264 places, 386 transitions, 5955 flow [2024-05-12 10:36:25,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5802, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5955, PETRI_PLACES=264, PETRI_TRANSITIONS=386} [2024-05-12 10:36:25,308 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 214 predicate places. [2024-05-12 10:36:25,308 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 386 transitions, 5955 flow [2024-05-12 10:36:25,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:25,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:25,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:25,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 10:36:25,309 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:25,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash 856647225, now seen corresponding path program 3 times [2024-05-12 10:36:25,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:25,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052874553] [2024-05-12 10:36:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:25,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:25,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:25,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052874553] [2024-05-12 10:36:25,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052874553] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:25,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:25,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:25,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895986870] [2024-05-12 10:36:25,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:25,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:25,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:25,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:25,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:25,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:25,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 386 transitions, 5955 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:25,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:25,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:25,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:26,784 INFO L124 PetriNetUnfolderBase]: 5138/8404 cut-off events. [2024-05-12 10:36:26,785 INFO L125 PetriNetUnfolderBase]: For 296414/296414 co-relation queries the response was YES. [2024-05-12 10:36:26,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50249 conditions, 8404 events. 5138/8404 cut-off events. For 296414/296414 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 59652 event pairs, 1603 based on Foata normal form. 2/8382 useless extension candidates. Maximal degree in co-relation 50125. Up to 7494 conditions per place. [2024-05-12 10:36:26,899 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 366 selfloop transitions, 29 changer transitions 0/407 dead transitions. [2024-05-12 10:36:26,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 407 transitions, 6831 flow [2024-05-12 10:36:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-05-12 10:36:26,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 10:36:26,900 INFO L175 Difference]: Start difference. First operand has 264 places, 386 transitions, 5955 flow. Second operand 5 states and 138 transitions. [2024-05-12 10:36:26,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 407 transitions, 6831 flow [2024-05-12 10:36:27,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 407 transitions, 6757 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:27,576 INFO L231 Difference]: Finished difference. Result has 267 places, 388 transitions, 5996 flow [2024-05-12 10:36:27,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5996, PETRI_PLACES=267, PETRI_TRANSITIONS=388} [2024-05-12 10:36:27,576 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 217 predicate places. [2024-05-12 10:36:27,576 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 388 transitions, 5996 flow [2024-05-12 10:36:27,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:27,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:27,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:27,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 10:36:27,577 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:27,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:27,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1086863145, now seen corresponding path program 4 times [2024-05-12 10:36:27,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:27,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724433179] [2024-05-12 10:36:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:27,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:27,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724433179] [2024-05-12 10:36:27,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724433179] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:27,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:27,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:27,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809635385] [2024-05-12 10:36:27,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:27,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:27,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:27,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:27,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:27,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:27,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 388 transitions, 5996 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:27,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:27,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:27,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:29,004 INFO L124 PetriNetUnfolderBase]: 5133/8146 cut-off events. [2024-05-12 10:36:29,004 INFO L125 PetriNetUnfolderBase]: For 288058/288060 co-relation queries the response was YES. [2024-05-12 10:36:29,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49760 conditions, 8146 events. 5133/8146 cut-off events. For 288058/288060 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 56440 event pairs, 849 based on Foata normal form. 4/8136 useless extension candidates. Maximal degree in co-relation 49635. Up to 7455 conditions per place. [2024-05-12 10:36:29,111 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 365 selfloop transitions, 30 changer transitions 0/407 dead transitions. [2024-05-12 10:36:29,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 407 transitions, 6866 flow [2024-05-12 10:36:29,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-05-12 10:36:29,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:36:29,112 INFO L175 Difference]: Start difference. First operand has 267 places, 388 transitions, 5996 flow. Second operand 5 states and 135 transitions. [2024-05-12 10:36:29,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 407 transitions, 6866 flow [2024-05-12 10:36:29,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 407 transitions, 6777 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:29,849 INFO L231 Difference]: Finished difference. Result has 269 places, 390 transitions, 6018 flow [2024-05-12 10:36:29,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5911, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6018, PETRI_PLACES=269, PETRI_TRANSITIONS=390} [2024-05-12 10:36:29,850 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 219 predicate places. [2024-05-12 10:36:29,850 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 390 transitions, 6018 flow [2024-05-12 10:36:29,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:29,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:29,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:29,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 10:36:29,851 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:29,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:29,851 INFO L85 PathProgramCache]: Analyzing trace with hash 515749596, now seen corresponding path program 1 times [2024-05-12 10:36:29,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:29,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082636772] [2024-05-12 10:36:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:29,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:29,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:29,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082636772] [2024-05-12 10:36:29,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082636772] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:29,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:29,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:36:29,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992686079] [2024-05-12 10:36:29,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:29,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:36:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:36:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:36:29,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 46 [2024-05-12 10:36:29,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 390 transitions, 6018 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:29,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:29,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 46 [2024-05-12 10:36:29,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:30,972 INFO L124 PetriNetUnfolderBase]: 3497/7485 cut-off events. [2024-05-12 10:36:30,972 INFO L125 PetriNetUnfolderBase]: For 119120/119979 co-relation queries the response was YES. [2024-05-12 10:36:31,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30249 conditions, 7485 events. 3497/7485 cut-off events. For 119120/119979 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 67459 event pairs, 443 based on Foata normal form. 360/7282 useless extension candidates. Maximal degree in co-relation 30123. Up to 2867 conditions per place. [2024-05-12 10:36:31,071 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 32 selfloop transitions, 132 changer transitions 0/404 dead transitions. [2024-05-12 10:36:31,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 404 transitions, 6400 flow [2024-05-12 10:36:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:36:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:36:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-05-12 10:36:31,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7336956521739131 [2024-05-12 10:36:31,072 INFO L175 Difference]: Start difference. First operand has 269 places, 390 transitions, 6018 flow. Second operand 4 states and 135 transitions. [2024-05-12 10:36:31,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 404 transitions, 6400 flow [2024-05-12 10:36:31,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 404 transitions, 6309 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:31,517 INFO L231 Difference]: Finished difference. Result has 271 places, 391 transitions, 6461 flow [2024-05-12 10:36:31,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5927, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=6461, PETRI_PLACES=271, PETRI_TRANSITIONS=391} [2024-05-12 10:36:31,518 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 221 predicate places. [2024-05-12 10:36:31,518 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 391 transitions, 6461 flow [2024-05-12 10:36:31,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:31,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:31,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:31,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 10:36:31,519 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:31,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:31,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1211232139, now seen corresponding path program 1 times [2024-05-12 10:36:31,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:31,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391767515] [2024-05-12 10:36:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:31,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:31,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:31,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391767515] [2024-05-12 10:36:31,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391767515] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:31,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:31,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:31,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880785755] [2024-05-12 10:36:31,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:31,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:31,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:31,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:31,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:31,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:31,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 391 transitions, 6461 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:31,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:31,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:31,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:33,323 INFO L124 PetriNetUnfolderBase]: 5711/9645 cut-off events. [2024-05-12 10:36:33,323 INFO L125 PetriNetUnfolderBase]: For 461323/461385 co-relation queries the response was YES. [2024-05-12 10:36:33,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57142 conditions, 9645 events. 5711/9645 cut-off events. For 461323/461385 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 72421 event pairs, 1625 based on Foata normal form. 59/9279 useless extension candidates. Maximal degree in co-relation 57014. Up to 5354 conditions per place. [2024-05-12 10:36:33,453 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 200 selfloop transitions, 235 changer transitions 0/448 dead transitions. [2024-05-12 10:36:33,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 448 transitions, 8147 flow [2024-05-12 10:36:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-05-12 10:36:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.654891304347826 [2024-05-12 10:36:33,455 INFO L175 Difference]: Start difference. First operand has 271 places, 391 transitions, 6461 flow. Second operand 8 states and 241 transitions. [2024-05-12 10:36:33,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 448 transitions, 8147 flow [2024-05-12 10:36:34,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 448 transitions, 8014 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:34,474 INFO L231 Difference]: Finished difference. Result has 277 places, 395 transitions, 6915 flow [2024-05-12 10:36:34,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6328, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6915, PETRI_PLACES=277, PETRI_TRANSITIONS=395} [2024-05-12 10:36:34,475 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 227 predicate places. [2024-05-12 10:36:34,475 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 395 transitions, 6915 flow [2024-05-12 10:36:34,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:34,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:34,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:34,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 10:36:34,476 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:34,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash -574151145, now seen corresponding path program 2 times [2024-05-12 10:36:34,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:34,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115110515] [2024-05-12 10:36:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:34,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:34,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:34,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115110515] [2024-05-12 10:36:34,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115110515] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:34,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:34,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:34,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336526446] [2024-05-12 10:36:34,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:34,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:34,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:34,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:34,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:34,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:34,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 395 transitions, 6915 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:34,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:34,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:34,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:36,672 INFO L124 PetriNetUnfolderBase]: 6437/10891 cut-off events. [2024-05-12 10:36:36,672 INFO L125 PetriNetUnfolderBase]: For 587355/587423 co-relation queries the response was YES. [2024-05-12 10:36:36,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67447 conditions, 10891 events. 6437/10891 cut-off events. For 587355/587423 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 83812 event pairs, 2409 based on Foata normal form. 59/10479 useless extension candidates. Maximal degree in co-relation 67318. Up to 8026 conditions per place. [2024-05-12 10:36:36,872 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 205 selfloop transitions, 225 changer transitions 0/443 dead transitions. [2024-05-12 10:36:36,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 443 transitions, 8571 flow [2024-05-12 10:36:36,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:36,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:36,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-05-12 10:36:36,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6358695652173914 [2024-05-12 10:36:36,873 INFO L175 Difference]: Start difference. First operand has 277 places, 395 transitions, 6915 flow. Second operand 8 states and 234 transitions. [2024-05-12 10:36:36,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 443 transitions, 8571 flow [2024-05-12 10:36:38,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 443 transitions, 8218 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:38,159 INFO L231 Difference]: Finished difference. Result has 281 places, 399 transitions, 7137 flow [2024-05-12 10:36:38,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6570, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7137, PETRI_PLACES=281, PETRI_TRANSITIONS=399} [2024-05-12 10:36:38,159 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 231 predicate places. [2024-05-12 10:36:38,160 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 399 transitions, 7137 flow [2024-05-12 10:36:38,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:38,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:38,160 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] [2024-05-12 10:36:38,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 10:36:38,160 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:38,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:38,161 INFO L85 PathProgramCache]: Analyzing trace with hash -832429815, now seen corresponding path program 3 times [2024-05-12 10:36:38,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:38,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431571418] [2024-05-12 10:36:38,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:38,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:38,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:38,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431571418] [2024-05-12 10:36:38,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431571418] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:38,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:38,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:38,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67204975] [2024-05-12 10:36:38,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:38,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:38,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:38,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:38,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 399 transitions, 7137 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:38,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:38,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:38,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:40,243 INFO L124 PetriNetUnfolderBase]: 6350/10688 cut-off events. [2024-05-12 10:36:40,244 INFO L125 PetriNetUnfolderBase]: For 518502/518570 co-relation queries the response was YES. [2024-05-12 10:36:40,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64424 conditions, 10688 events. 6350/10688 cut-off events. For 518502/518570 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 82096 event pairs, 2527 based on Foata normal form. 65/10279 useless extension candidates. Maximal degree in co-relation 64293. Up to 8586 conditions per place. [2024-05-12 10:36:40,376 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 200 selfloop transitions, 221 changer transitions 0/434 dead transitions. [2024-05-12 10:36:40,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 434 transitions, 8489 flow [2024-05-12 10:36:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:40,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 10:36:40,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-05-12 10:36:40,378 INFO L175 Difference]: Start difference. First operand has 281 places, 399 transitions, 7137 flow. Second operand 8 states and 226 transitions. [2024-05-12 10:36:40,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 434 transitions, 8489 flow [2024-05-12 10:36:41,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 434 transitions, 8128 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:41,744 INFO L231 Difference]: Finished difference. Result has 285 places, 399 transitions, 7225 flow [2024-05-12 10:36:41,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6776, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7225, PETRI_PLACES=285, PETRI_TRANSITIONS=399} [2024-05-12 10:36:41,744 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 235 predicate places. [2024-05-12 10:36:41,744 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 399 transitions, 7225 flow [2024-05-12 10:36:41,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:41,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:41,745 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] [2024-05-12 10:36:41,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 10:36:41,745 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:41,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:41,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1131659387, now seen corresponding path program 1 times [2024-05-12 10:36:41,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:41,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980292736] [2024-05-12 10:36:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:41,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:41,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:41,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980292736] [2024-05-12 10:36:41,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980292736] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:41,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:41,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:41,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151641173] [2024-05-12 10:36:41,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:41,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:41,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:41,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:41,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:42,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:42,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 399 transitions, 7225 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:42,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:42,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:42,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:43,903 INFO L124 PetriNetUnfolderBase]: 6377/10740 cut-off events. [2024-05-12 10:36:43,903 INFO L125 PetriNetUnfolderBase]: For 434870/435148 co-relation queries the response was YES. [2024-05-12 10:36:43,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65076 conditions, 10740 events. 6377/10740 cut-off events. For 434870/435148 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 82627 event pairs, 2522 based on Foata normal form. 101/10358 useless extension candidates. Maximal degree in co-relation 64943. Up to 9452 conditions per place. [2024-05-12 10:36:44,015 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 312 selfloop transitions, 104 changer transitions 0/429 dead transitions. [2024-05-12 10:36:44,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 429 transitions, 8581 flow [2024-05-12 10:36:44,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 10:36:44,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:36:44,018 INFO L175 Difference]: Start difference. First operand has 285 places, 399 transitions, 7225 flow. Second operand 6 states and 165 transitions. [2024-05-12 10:36:44,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 429 transitions, 8581 flow [2024-05-12 10:36:44,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 429 transitions, 8118 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 10:36:44,975 INFO L231 Difference]: Finished difference. Result has 284 places, 408 transitions, 7176 flow [2024-05-12 10:36:44,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6774, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7176, PETRI_PLACES=284, PETRI_TRANSITIONS=408} [2024-05-12 10:36:44,976 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 234 predicate places. [2024-05-12 10:36:44,976 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 408 transitions, 7176 flow [2024-05-12 10:36:44,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:44,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:44,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:44,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 10:36:44,977 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:44,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:44,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1768743899, now seen corresponding path program 2 times [2024-05-12 10:36:44,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:44,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23801251] [2024-05-12 10:36:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:44,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:45,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:45,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23801251] [2024-05-12 10:36:45,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23801251] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:45,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:45,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:45,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151194377] [2024-05-12 10:36:45,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:45,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:45,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:45,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:45,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 408 transitions, 7176 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:45,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:45,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:45,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:46,849 INFO L124 PetriNetUnfolderBase]: 6384/10726 cut-off events. [2024-05-12 10:36:46,849 INFO L125 PetriNetUnfolderBase]: For 436708/436746 co-relation queries the response was YES. [2024-05-12 10:36:46,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64610 conditions, 10726 events. 6384/10726 cut-off events. For 436708/436746 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 82273 event pairs, 2466 based on Foata normal form. 39/10261 useless extension candidates. Maximal degree in co-relation 64476. Up to 9460 conditions per place. [2024-05-12 10:36:46,994 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 313 selfloop transitions, 111 changer transitions 0/437 dead transitions. [2024-05-12 10:36:46,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 437 transitions, 8570 flow [2024-05-12 10:36:46,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 10:36:46,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 10:36:46,995 INFO L175 Difference]: Start difference. First operand has 284 places, 408 transitions, 7176 flow. Second operand 7 states and 190 transitions. [2024-05-12 10:36:46,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 437 transitions, 8570 flow [2024-05-12 10:36:48,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 437 transitions, 8344 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:48,164 INFO L231 Difference]: Finished difference. Result has 288 places, 411 transitions, 7246 flow [2024-05-12 10:36:48,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6958, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7246, PETRI_PLACES=288, PETRI_TRANSITIONS=411} [2024-05-12 10:36:48,165 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 238 predicate places. [2024-05-12 10:36:48,165 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 411 transitions, 7246 flow [2024-05-12 10:36:48,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:48,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:48,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:48,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 10:36:48,166 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:48,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:48,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1466590681, now seen corresponding path program 3 times [2024-05-12 10:36:48,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:48,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219451805] [2024-05-12 10:36:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:48,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:48,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:48,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219451805] [2024-05-12 10:36:48,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219451805] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:48,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:48,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:48,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125135186] [2024-05-12 10:36:48,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:48,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:48,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:48,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:48,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 411 transitions, 7246 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:48,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:48,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:48,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:50,040 INFO L124 PetriNetUnfolderBase]: 6381/10744 cut-off events. [2024-05-12 10:36:50,040 INFO L125 PetriNetUnfolderBase]: For 449526/449807 co-relation queries the response was YES. [2024-05-12 10:36:50,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64702 conditions, 10744 events. 6381/10744 cut-off events. For 449526/449807 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 82587 event pairs, 2528 based on Foata normal form. 101/10360 useless extension candidates. Maximal degree in co-relation 64568. Up to 9457 conditions per place. [2024-05-12 10:36:50,200 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 311 selfloop transitions, 102 changer transitions 0/426 dead transitions. [2024-05-12 10:36:50,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 426 transitions, 8388 flow [2024-05-12 10:36:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:50,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-05-12 10:36:50,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2024-05-12 10:36:50,202 INFO L175 Difference]: Start difference. First operand has 288 places, 411 transitions, 7246 flow. Second operand 6 states and 160 transitions. [2024-05-12 10:36:50,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 426 transitions, 8388 flow [2024-05-12 10:36:51,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 426 transitions, 8071 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:51,435 INFO L231 Difference]: Finished difference. Result has 289 places, 411 transitions, 7139 flow [2024-05-12 10:36:51,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6929, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7139, PETRI_PLACES=289, PETRI_TRANSITIONS=411} [2024-05-12 10:36:51,435 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 239 predicate places. [2024-05-12 10:36:51,435 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 411 transitions, 7139 flow [2024-05-12 10:36:51,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:51,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:51,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:51,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 10:36:51,436 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:51,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:51,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1773986309, now seen corresponding path program 4 times [2024-05-12 10:36:51,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:51,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689596327] [2024-05-12 10:36:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:51,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:51,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:51,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689596327] [2024-05-12 10:36:51,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689596327] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:51,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:51,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120766043] [2024-05-12 10:36:51,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:51,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:51,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:51,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:51,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:51,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:51,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 411 transitions, 7139 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:51,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:51,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:51,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:53,469 INFO L124 PetriNetUnfolderBase]: 6388/10745 cut-off events. [2024-05-12 10:36:53,470 INFO L125 PetriNetUnfolderBase]: For 457026/457124 co-relation queries the response was YES. [2024-05-12 10:36:53,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64835 conditions, 10745 events. 6388/10745 cut-off events. For 457026/457124 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 82591 event pairs, 2505 based on Foata normal form. 64/10326 useless extension candidates. Maximal degree in co-relation 64700. Up to 9465 conditions per place. [2024-05-12 10:36:53,612 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 306 selfloop transitions, 120 changer transitions 0/439 dead transitions. [2024-05-12 10:36:53,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 439 transitions, 8390 flow [2024-05-12 10:36:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-05-12 10:36:53,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993788819875776 [2024-05-12 10:36:53,613 INFO L175 Difference]: Start difference. First operand has 289 places, 411 transitions, 7139 flow. Second operand 7 states and 193 transitions. [2024-05-12 10:36:53,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 439 transitions, 8390 flow [2024-05-12 10:36:54,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 439 transitions, 8179 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:54,926 INFO L231 Difference]: Finished difference. Result has 292 places, 414 transitions, 7227 flow [2024-05-12 10:36:54,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7227, PETRI_PLACES=292, PETRI_TRANSITIONS=414} [2024-05-12 10:36:54,926 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 242 predicate places. [2024-05-12 10:36:54,927 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 414 transitions, 7227 flow [2024-05-12 10:36:54,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:54,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:54,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:54,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 10:36:54,927 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:54,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1882243367, now seen corresponding path program 5 times [2024-05-12 10:36:54,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:54,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728641358] [2024-05-12 10:36:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:54,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:55,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:55,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728641358] [2024-05-12 10:36:55,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728641358] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:55,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:55,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:55,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107658179] [2024-05-12 10:36:55,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:55,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:55,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:55,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:55,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:55,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:55,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 414 transitions, 7227 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:55,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:55,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:55,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:57,172 INFO L124 PetriNetUnfolderBase]: 6385/10733 cut-off events. [2024-05-12 10:36:57,172 INFO L125 PetriNetUnfolderBase]: For 464832/464910 co-relation queries the response was YES. [2024-05-12 10:36:57,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64802 conditions, 10733 events. 6385/10733 cut-off events. For 464832/464910 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 82442 event pairs, 2499 based on Foata normal form. 52/10294 useless extension candidates. Maximal degree in co-relation 64667. Up to 9462 conditions per place. [2024-05-12 10:36:57,297 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 308 selfloop transitions, 115 changer transitions 0/436 dead transitions. [2024-05-12 10:36:57,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 436 transitions, 8557 flow [2024-05-12 10:36:57,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 10:36:57,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531400966183575 [2024-05-12 10:36:57,298 INFO L175 Difference]: Start difference. First operand has 292 places, 414 transitions, 7227 flow. Second operand 9 states and 229 transitions. [2024-05-12 10:36:57,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 436 transitions, 8557 flow [2024-05-12 10:36:58,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 436 transitions, 8388 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:58,520 INFO L231 Difference]: Finished difference. Result has 297 places, 414 transitions, 7294 flow [2024-05-12 10:36:58,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7058, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7294, PETRI_PLACES=297, PETRI_TRANSITIONS=414} [2024-05-12 10:36:58,521 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 247 predicate places. [2024-05-12 10:36:58,521 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 414 transitions, 7294 flow [2024-05-12 10:36:58,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:58,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:58,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:58,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 10:36:58,522 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:58,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:58,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1462865659, now seen corresponding path program 1 times [2024-05-12 10:36:58,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:58,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165173317] [2024-05-12 10:36:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:58,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:58,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:58,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165173317] [2024-05-12 10:36:58,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165173317] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:58,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:58,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:58,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499488911] [2024-05-12 10:36:58,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:58,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:58,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:58,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:58,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:58,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:58,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 414 transitions, 7294 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:58,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:58,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:58,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:00,525 INFO L124 PetriNetUnfolderBase]: 6400/10763 cut-off events. [2024-05-12 10:37:00,525 INFO L125 PetriNetUnfolderBase]: For 481755/481857 co-relation queries the response was YES. [2024-05-12 10:37:00,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65218 conditions, 10763 events. 6400/10763 cut-off events. For 481755/481857 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 82693 event pairs, 2532 based on Foata normal form. 33/10309 useless extension candidates. Maximal degree in co-relation 65081. Up to 9133 conditions per place. [2024-05-12 10:37:00,686 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 208 selfloop transitions, 220 changer transitions 0/441 dead transitions. [2024-05-12 10:37:00,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 441 transitions, 8580 flow [2024-05-12 10:37:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:00,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 10:37:00,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 10:37:00,688 INFO L175 Difference]: Start difference. First operand has 297 places, 414 transitions, 7294 flow. Second operand 8 states and 213 transitions. [2024-05-12 10:37:00,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 441 transitions, 8580 flow [2024-05-12 10:37:02,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 441 transitions, 8274 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:37:02,343 INFO L231 Difference]: Finished difference. Result has 297 places, 418 transitions, 7519 flow [2024-05-12 10:37:02,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6988, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7519, PETRI_PLACES=297, PETRI_TRANSITIONS=418} [2024-05-12 10:37:02,344 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 247 predicate places. [2024-05-12 10:37:02,344 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 418 transitions, 7519 flow [2024-05-12 10:37:02,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:02,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:02,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:02,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 10:37:02,345 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:02,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:02,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1882078757, now seen corresponding path program 6 times [2024-05-12 10:37:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:02,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694637142] [2024-05-12 10:37:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:02,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:02,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:02,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694637142] [2024-05-12 10:37:02,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694637142] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:02,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:02,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:02,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201799486] [2024-05-12 10:37:02,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:02,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:02,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:02,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:02,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:02,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 418 transitions, 7519 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:02,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:02,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:02,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:04,739 INFO L124 PetriNetUnfolderBase]: 6397/10752 cut-off events. [2024-05-12 10:37:04,740 INFO L125 PetriNetUnfolderBase]: For 486374/486448 co-relation queries the response was YES. [2024-05-12 10:37:04,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65691 conditions, 10752 events. 6397/10752 cut-off events. For 486374/486448 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 82426 event pairs, 2499 based on Foata normal form. 48/10304 useless extension candidates. Maximal degree in co-relation 65554. Up to 9478 conditions per place. [2024-05-12 10:37:04,873 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 314 selfloop transitions, 110 changer transitions 0/437 dead transitions. [2024-05-12 10:37:04,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 437 transitions, 8709 flow [2024-05-12 10:37:04,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 10:37:04,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577639751552795 [2024-05-12 10:37:04,875 INFO L175 Difference]: Start difference. First operand has 297 places, 418 transitions, 7519 flow. Second operand 7 states and 186 transitions. [2024-05-12 10:37:04,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 437 transitions, 8709 flow [2024-05-12 10:37:06,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 437 transitions, 8229 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:06,278 INFO L231 Difference]: Finished difference. Result has 298 places, 418 transitions, 7267 flow [2024-05-12 10:37:06,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7039, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7267, PETRI_PLACES=298, PETRI_TRANSITIONS=418} [2024-05-12 10:37:06,287 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 248 predicate places. [2024-05-12 10:37:06,288 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 418 transitions, 7267 flow [2024-05-12 10:37:06,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:06,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:06,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:06,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 10:37:06,288 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:06,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:06,289 INFO L85 PathProgramCache]: Analyzing trace with hash -676582761, now seen corresponding path program 2 times [2024-05-12 10:37:06,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:06,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349363018] [2024-05-12 10:37:06,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:06,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:06,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:06,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349363018] [2024-05-12 10:37:06,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349363018] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:06,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:06,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:06,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475143529] [2024-05-12 10:37:06,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:06,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:06,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:06,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:06,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:06,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:06,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 418 transitions, 7267 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:06,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:06,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:06,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:08,766 INFO L124 PetriNetUnfolderBase]: 6412/10784 cut-off events. [2024-05-12 10:37:08,767 INFO L125 PetriNetUnfolderBase]: For 498970/499052 co-relation queries the response was YES. [2024-05-12 10:37:08,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65523 conditions, 10784 events. 6412/10784 cut-off events. For 498970/499052 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 82701 event pairs, 2530 based on Foata normal form. 29/10320 useless extension candidates. Maximal degree in co-relation 65385. Up to 9146 conditions per place. [2024-05-12 10:37:08,907 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 207 selfloop transitions, 225 changer transitions 0/445 dead transitions. [2024-05-12 10:37:08,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 445 transitions, 8571 flow [2024-05-12 10:37:08,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 10:37:08,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 10:37:08,908 INFO L175 Difference]: Start difference. First operand has 298 places, 418 transitions, 7267 flow. Second operand 8 states and 215 transitions. [2024-05-12 10:37:08,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 445 transitions, 8571 flow [2024-05-12 10:37:10,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 445 transitions, 8390 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:10,355 INFO L231 Difference]: Finished difference. Result has 301 places, 422 transitions, 7629 flow [2024-05-12 10:37:10,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7086, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7629, PETRI_PLACES=301, PETRI_TRANSITIONS=422} [2024-05-12 10:37:10,356 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 251 predicate places. [2024-05-12 10:37:10,356 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 422 transitions, 7629 flow [2024-05-12 10:37:10,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:10,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:10,356 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] [2024-05-12 10:37:10,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 10:37:10,357 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:10,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:10,357 INFO L85 PathProgramCache]: Analyzing trace with hash -265880773, now seen corresponding path program 3 times [2024-05-12 10:37:10,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:10,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478714357] [2024-05-12 10:37:10,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:10,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:10,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:10,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478714357] [2024-05-12 10:37:10,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478714357] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:10,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:10,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:10,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522946642] [2024-05-12 10:37:10,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:10,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:10,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:10,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:10,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:10,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:10,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 422 transitions, 7629 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:10,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:10,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:10,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:12,750 INFO L124 PetriNetUnfolderBase]: 6459/10852 cut-off events. [2024-05-12 10:37:12,758 INFO L125 PetriNetUnfolderBase]: For 523269/523383 co-relation queries the response was YES. [2024-05-12 10:37:12,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67228 conditions, 10852 events. 6459/10852 cut-off events. For 523269/523383 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 83260 event pairs, 2534 based on Foata normal form. 35/10385 useless extension candidates. Maximal degree in co-relation 67089. Up to 9193 conditions per place. [2024-05-12 10:37:12,896 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 223 selfloop transitions, 219 changer transitions 0/455 dead transitions. [2024-05-12 10:37:12,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 455 transitions, 9275 flow [2024-05-12 10:37:12,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-05-12 10:37:12,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:37:12,898 INFO L175 Difference]: Start difference. First operand has 301 places, 422 transitions, 7629 flow. Second operand 9 states and 234 transitions. [2024-05-12 10:37:12,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 455 transitions, 9275 flow [2024-05-12 10:37:14,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 455 transitions, 8764 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:14,342 INFO L231 Difference]: Finished difference. Result has 304 places, 432 transitions, 7795 flow [2024-05-12 10:37:14,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7136, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7795, PETRI_PLACES=304, PETRI_TRANSITIONS=432} [2024-05-12 10:37:14,343 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 254 predicate places. [2024-05-12 10:37:14,343 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 432 transitions, 7795 flow [2024-05-12 10:37:14,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:14,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:14,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:14,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 10:37:14,352 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:14,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:14,353 INFO L85 PathProgramCache]: Analyzing trace with hash -266755835, now seen corresponding path program 4 times [2024-05-12 10:37:14,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:14,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538686714] [2024-05-12 10:37:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:14,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:14,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:14,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538686714] [2024-05-12 10:37:14,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538686714] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:14,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:14,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:14,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349609638] [2024-05-12 10:37:14,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:14,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:14,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:14,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:14,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:14,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:14,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 432 transitions, 7795 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:14,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:14,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:14,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:16,860 INFO L124 PetriNetUnfolderBase]: 6463/10865 cut-off events. [2024-05-12 10:37:16,860 INFO L125 PetriNetUnfolderBase]: For 531749/531863 co-relation queries the response was YES. [2024-05-12 10:37:16,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67309 conditions, 10865 events. 6463/10865 cut-off events. For 531749/531863 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 83557 event pairs, 2540 based on Foata normal form. 35/10405 useless extension candidates. Maximal degree in co-relation 67169. Up to 9196 conditions per place. [2024-05-12 10:37:17,007 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 221 selfloop transitions, 221 changer transitions 0/455 dead transitions. [2024-05-12 10:37:17,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 455 transitions, 9107 flow [2024-05-12 10:37:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:17,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 10:37:17,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 10:37:17,009 INFO L175 Difference]: Start difference. First operand has 304 places, 432 transitions, 7795 flow. Second operand 8 states and 212 transitions. [2024-05-12 10:37:17,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 455 transitions, 9107 flow [2024-05-12 10:37:18,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 455 transitions, 8698 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:18,534 INFO L231 Difference]: Finished difference. Result has 307 places, 435 transitions, 7909 flow [2024-05-12 10:37:18,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7400, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7909, PETRI_PLACES=307, PETRI_TRANSITIONS=435} [2024-05-12 10:37:18,535 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 257 predicate places. [2024-05-12 10:37:18,535 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 435 transitions, 7909 flow [2024-05-12 10:37:18,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:18,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:18,535 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] [2024-05-12 10:37:18,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 10:37:18,536 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:18,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash -493974433, now seen corresponding path program 5 times [2024-05-12 10:37:18,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:18,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601894640] [2024-05-12 10:37:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:18,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:18,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:18,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601894640] [2024-05-12 10:37:18,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601894640] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:18,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:18,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:18,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756853697] [2024-05-12 10:37:18,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:18,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:18,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:18,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:18,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:18,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:18,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 435 transitions, 7909 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:18,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:18,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:18,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:20,997 INFO L124 PetriNetUnfolderBase]: 6478/10875 cut-off events. [2024-05-12 10:37:20,998 INFO L125 PetriNetUnfolderBase]: For 545653/545731 co-relation queries the response was YES. [2024-05-12 10:37:21,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67592 conditions, 10875 events. 6478/10875 cut-off events. For 545653/545731 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 83451 event pairs, 2522 based on Foata normal form. 29/10383 useless extension candidates. Maximal degree in co-relation 67450. Up to 9211 conditions per place. [2024-05-12 10:37:21,143 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 221 selfloop transitions, 229 changer transitions 0/463 dead transitions. [2024-05-12 10:37:21,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 463 transitions, 9478 flow [2024-05-12 10:37:21,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-05-12 10:37:21,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5700483091787439 [2024-05-12 10:37:21,144 INFO L175 Difference]: Start difference. First operand has 307 places, 435 transitions, 7909 flow. Second operand 9 states and 236 transitions. [2024-05-12 10:37:21,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 463 transitions, 9478 flow [2024-05-12 10:37:22,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 463 transitions, 9136 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:22,756 INFO L231 Difference]: Finished difference. Result has 311 places, 441 transitions, 8183 flow [2024-05-12 10:37:22,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7572, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8183, PETRI_PLACES=311, PETRI_TRANSITIONS=441} [2024-05-12 10:37:22,756 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 261 predicate places. [2024-05-12 10:37:22,756 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 441 transitions, 8183 flow [2024-05-12 10:37:22,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:22,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:22,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:22,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 10:37:22,757 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:22,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:22,757 INFO L85 PathProgramCache]: Analyzing trace with hash 6500881, now seen corresponding path program 4 times [2024-05-12 10:37:22,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272397898] [2024-05-12 10:37:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:22,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:22,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:22,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:22,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272397898] [2024-05-12 10:37:22,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272397898] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:22,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:22,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:22,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079551041] [2024-05-12 10:37:22,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:22,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:22,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:22,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:22,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:23,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:23,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 441 transitions, 8183 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:23,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:23,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:23,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:25,540 INFO L124 PetriNetUnfolderBase]: 6829/11521 cut-off events. [2024-05-12 10:37:25,540 INFO L125 PetriNetUnfolderBase]: For 693863/693980 co-relation queries the response was YES. [2024-05-12 10:37:25,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70813 conditions, 11521 events. 6829/11521 cut-off events. For 693863/693980 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 89778 event pairs, 2765 based on Foata normal form. 74/11078 useless extension candidates. Maximal degree in co-relation 70669. Up to 9270 conditions per place. [2024-05-12 10:37:25,680 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 229 selfloop transitions, 229 changer transitions 0/471 dead transitions. [2024-05-12 10:37:25,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 471 transitions, 9563 flow [2024-05-12 10:37:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:25,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:25,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 10:37:25,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:37:25,681 INFO L175 Difference]: Start difference. First operand has 311 places, 441 transitions, 8183 flow. Second operand 8 states and 220 transitions. [2024-05-12 10:37:25,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 471 transitions, 9563 flow [2024-05-12 10:37:27,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 471 transitions, 9025 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:27,367 INFO L231 Difference]: Finished difference. Result has 313 places, 443 transitions, 8172 flow [2024-05-12 10:37:27,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7645, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8172, PETRI_PLACES=313, PETRI_TRANSITIONS=443} [2024-05-12 10:37:27,368 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 263 predicate places. [2024-05-12 10:37:27,368 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 443 transitions, 8172 flow [2024-05-12 10:37:27,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:27,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:27,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:27,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 10:37:27,369 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:27,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:27,369 INFO L85 PathProgramCache]: Analyzing trace with hash 6174451, now seen corresponding path program 5 times [2024-05-12 10:37:27,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:27,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241305636] [2024-05-12 10:37:27,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:27,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:27,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:27,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:27,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241305636] [2024-05-12 10:37:27,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241305636] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:27,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:27,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:27,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757415931] [2024-05-12 10:37:27,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:27,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:27,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:27,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:27,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:27,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 443 transitions, 8172 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:27,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:27,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:27,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:30,300 INFO L124 PetriNetUnfolderBase]: 7555/12811 cut-off events. [2024-05-12 10:37:30,300 INFO L125 PetriNetUnfolderBase]: For 842812/842929 co-relation queries the response was YES. [2024-05-12 10:37:30,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80512 conditions, 12811 events. 7555/12811 cut-off events. For 842812/842929 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 102180 event pairs, 3009 based on Foata normal form. 68/12328 useless extension candidates. Maximal degree in co-relation 80367. Up to 9237 conditions per place. [2024-05-12 10:37:30,501 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 236 selfloop transitions, 235 changer transitions 0/484 dead transitions. [2024-05-12 10:37:30,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 484 transitions, 9852 flow [2024-05-12 10:37:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-05-12 10:37:30,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168478260869565 [2024-05-12 10:37:30,503 INFO L175 Difference]: Start difference. First operand has 313 places, 443 transitions, 8172 flow. Second operand 8 states and 227 transitions. [2024-05-12 10:37:30,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 484 transitions, 9852 flow [2024-05-12 10:37:32,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 484 transitions, 9365 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:32,302 INFO L231 Difference]: Finished difference. Result has 315 places, 447 transitions, 8288 flow [2024-05-12 10:37:32,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7685, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8288, PETRI_PLACES=315, PETRI_TRANSITIONS=447} [2024-05-12 10:37:32,302 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 265 predicate places. [2024-05-12 10:37:32,302 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 447 transitions, 8288 flow [2024-05-12 10:37:32,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:32,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:32,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:32,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 10:37:32,303 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:32,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:32,303 INFO L85 PathProgramCache]: Analyzing trace with hash -259527317, now seen corresponding path program 6 times [2024-05-12 10:37:32,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:32,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122195167] [2024-05-12 10:37:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:32,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:32,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:32,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122195167] [2024-05-12 10:37:32,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122195167] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:32,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:32,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:32,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977674879] [2024-05-12 10:37:32,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:32,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:32,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:32,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:32,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:32,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:32,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 447 transitions, 8288 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:32,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:32,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:32,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:34,997 INFO L124 PetriNetUnfolderBase]: 7468/12610 cut-off events. [2024-05-12 10:37:34,998 INFO L125 PetriNetUnfolderBase]: For 741612/741729 co-relation queries the response was YES. [2024-05-12 10:37:35,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76330 conditions, 12610 events. 7468/12610 cut-off events. For 741612/741729 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 100426 event pairs, 3126 based on Foata normal form. 74/12127 useless extension candidates. Maximal degree in co-relation 76184. Up to 10299 conditions per place. [2024-05-12 10:37:35,442 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 234 selfloop transitions, 228 changer transitions 0/475 dead transitions. [2024-05-12 10:37:35,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 475 transitions, 9626 flow [2024-05-12 10:37:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-05-12 10:37:35,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595108695652174 [2024-05-12 10:37:35,443 INFO L175 Difference]: Start difference. First operand has 315 places, 447 transitions, 8288 flow. Second operand 8 states and 219 transitions. [2024-05-12 10:37:35,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 475 transitions, 9626 flow [2024-05-12 10:37:37,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 475 transitions, 9269 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-05-12 10:37:37,315 INFO L231 Difference]: Finished difference. Result has 319 places, 447 transitions, 8394 flow [2024-05-12 10:37:37,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7931, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8394, PETRI_PLACES=319, PETRI_TRANSITIONS=447} [2024-05-12 10:37:37,316 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 269 predicate places. [2024-05-12 10:37:37,316 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 447 transitions, 8394 flow [2024-05-12 10:37:37,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:37,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:37,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:37,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 10:37:37,317 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:37,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:37,317 INFO L85 PathProgramCache]: Analyzing trace with hash 17625355, now seen corresponding path program 1 times [2024-05-12 10:37:37,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:37,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277742323] [2024-05-12 10:37:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:37,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:37,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:37,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277742323] [2024-05-12 10:37:37,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277742323] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:37,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:37,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:37,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544840228] [2024-05-12 10:37:37,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:37,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:37,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:37,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:37,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:37,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:37,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 447 transitions, 8394 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:37,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:37,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:37,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:40,326 INFO L124 PetriNetUnfolderBase]: 7995/13675 cut-off events. [2024-05-12 10:37:40,327 INFO L125 PetriNetUnfolderBase]: For 792469/792586 co-relation queries the response was YES. [2024-05-12 10:37:40,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82981 conditions, 13675 events. 7995/13675 cut-off events. For 792469/792586 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 111283 event pairs, 3217 based on Foata normal form. 68/13179 useless extension candidates. Maximal degree in co-relation 82833. Up to 9201 conditions per place. [2024-05-12 10:37:40,524 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 247 selfloop transitions, 228 changer transitions 0/488 dead transitions. [2024-05-12 10:37:40,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 488 transitions, 10086 flow [2024-05-12 10:37:40,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:40,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:40,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-05-12 10:37:40,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141304347826086 [2024-05-12 10:37:40,525 INFO L175 Difference]: Start difference. First operand has 319 places, 447 transitions, 8394 flow. Second operand 8 states and 226 transitions. [2024-05-12 10:37:40,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 488 transitions, 10086 flow [2024-05-12 10:37:42,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 488 transitions, 9612 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:42,798 INFO L231 Difference]: Finished difference. Result has 321 places, 451 transitions, 8529 flow [2024-05-12 10:37:42,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7920, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8529, PETRI_PLACES=321, PETRI_TRANSITIONS=451} [2024-05-12 10:37:42,798 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 271 predicate places. [2024-05-12 10:37:42,799 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 451 transitions, 8529 flow [2024-05-12 10:37:42,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:42,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:42,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:42,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 10:37:42,799 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:42,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1842660421, now seen corresponding path program 6 times [2024-05-12 10:37:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578643249] [2024-05-12 10:37:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:43,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:43,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578643249] [2024-05-12 10:37:43,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578643249] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:43,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:43,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:43,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904202256] [2024-05-12 10:37:43,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:43,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:43,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:43,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:43,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:43,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 451 transitions, 8529 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:43,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:43,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:43,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:45,665 INFO L124 PetriNetUnfolderBase]: 7992/13555 cut-off events. [2024-05-12 10:37:45,665 INFO L125 PetriNetUnfolderBase]: For 699204/699363 co-relation queries the response was YES. [2024-05-12 10:37:45,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83434 conditions, 13555 events. 7992/13555 cut-off events. For 699204/699363 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 110355 event pairs, 3411 based on Foata normal form. 42/13033 useless extension candidates. Maximal degree in co-relation 83284. Up to 11644 conditions per place. [2024-05-12 10:37:45,851 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 208 selfloop transitions, 252 changer transitions 0/473 dead transitions. [2024-05-12 10:37:45,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 473 transitions, 10027 flow [2024-05-12 10:37:45,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-05-12 10:37:45,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706521739130435 [2024-05-12 10:37:45,852 INFO L175 Difference]: Start difference. First operand has 321 places, 451 transitions, 8529 flow. Second operand 8 states and 210 transitions. [2024-05-12 10:37:45,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 473 transitions, 10027 flow [2024-05-12 10:37:48,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 473 transitions, 9698 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-05-12 10:37:48,030 INFO L231 Difference]: Finished difference. Result has 325 places, 452 transitions, 8740 flow [2024-05-12 10:37:48,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8200, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8740, PETRI_PLACES=325, PETRI_TRANSITIONS=452} [2024-05-12 10:37:48,031 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 275 predicate places. [2024-05-12 10:37:48,031 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 452 transitions, 8740 flow [2024-05-12 10:37:48,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:48,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:48,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:48,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 10:37:48,032 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:48,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:48,032 INFO L85 PathProgramCache]: Analyzing trace with hash 345115289, now seen corresponding path program 7 times [2024-05-12 10:37:48,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:48,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806436379] [2024-05-12 10:37:48,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:48,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:48,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:48,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:48,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806436379] [2024-05-12 10:37:48,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806436379] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:48,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:48,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:48,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561336172] [2024-05-12 10:37:48,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:48,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:48,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:48,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:48,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:48,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:48,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 452 transitions, 8740 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:48,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:48,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:48,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:51,172 INFO L124 PetriNetUnfolderBase]: 7999/13566 cut-off events. [2024-05-12 10:37:51,172 INFO L125 PetriNetUnfolderBase]: For 702870/703018 co-relation queries the response was YES. [2024-05-12 10:37:51,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83570 conditions, 13566 events. 7999/13566 cut-off events. For 702870/703018 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 110339 event pairs, 3411 based on Foata normal form. 41/13041 useless extension candidates. Maximal degree in co-relation 83418. Up to 11650 conditions per place. [2024-05-12 10:37:51,351 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 198 selfloop transitions, 265 changer transitions 0/476 dead transitions. [2024-05-12 10:37:51,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 476 transitions, 10297 flow [2024-05-12 10:37:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 10:37:51,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 10:37:51,353 INFO L175 Difference]: Start difference. First operand has 325 places, 452 transitions, 8740 flow. Second operand 8 states and 213 transitions. [2024-05-12 10:37:51,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 476 transitions, 10297 flow [2024-05-12 10:37:53,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 476 transitions, 9952 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-05-12 10:37:53,242 INFO L231 Difference]: Finished difference. Result has 329 places, 455 transitions, 9008 flow [2024-05-12 10:37:53,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9008, PETRI_PLACES=329, PETRI_TRANSITIONS=455} [2024-05-12 10:37:53,242 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 279 predicate places. [2024-05-12 10:37:53,242 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 455 transitions, 9008 flow [2024-05-12 10:37:53,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:53,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:53,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:53,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 10:37:53,245 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:53,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:53,246 INFO L85 PathProgramCache]: Analyzing trace with hash 344699579, now seen corresponding path program 8 times [2024-05-12 10:37:53,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:53,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232165840] [2024-05-12 10:37:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:53,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:53,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:53,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:53,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232165840] [2024-05-12 10:37:53,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232165840] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:53,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:53,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:53,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497144449] [2024-05-12 10:37:53,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:53,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:53,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:53,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:53,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:53,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:53,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 455 transitions, 9008 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:53,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:53,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:53,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand