./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix044_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix044_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix044_tso.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix044_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:11:17,481 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:11:17,547 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:11:17,573 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:11:17,573 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:11:17,593 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:11:17,594 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:11:17,594 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:11:17,595 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:11:17,595 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:11:17,595 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:11:17,595 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:11:17,596 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:11:17,596 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:11:17,596 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:11:17,597 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:11:17,597 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:11:17,597 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:11:17,598 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:11:17,598 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:11:17,598 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:11:17,599 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:11:17,599 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:11:17,599 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:11:17,599 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:11:17,600 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:11:17,600 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:11:17,600 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:11:17,601 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:11:17,601 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:11:17,601 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:11:17,601 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:11:17,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:11:17,602 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:11:17,602 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:11:17,602 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:11:17,603 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:11:17,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:11:17,603 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:11:17,603 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:11:17,603 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:11:17,605 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:11:17,606 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:11:17,606 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:11:17,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:11:17,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:11:17,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:11:17,775 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:11:17,776 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:11:17,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix044_tso.oepc.yml/witness.yml [2024-06-21 21:11:17,978 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:11:17,978 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:11:17,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix044_tso.oepc.i [2024-06-21 21:11:19,045 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:11:19,237 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:11:19,237 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix044_tso.oepc.i [2024-06-21 21:11:19,250 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e748a5c66/e5213c3253bd4a80bb3e01243f8439c9/FLAG9ee33b4b6 [2024-06-21 21:11:19,260 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e748a5c66/e5213c3253bd4a80bb3e01243f8439c9 [2024-06-21 21:11:19,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:11:19,262 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:11:19,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:11:19,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:11:19,267 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:11:19,268 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:11:17" (1/2) ... [2024-06-21 21:11:19,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c709415 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:11:19, skipping insertion in model container [2024-06-21 21:11:19,276 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:11:17" (1/2) ... [2024-06-21 21:11:19,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3fed1eb9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:11:19, skipping insertion in model container [2024-06-21 21:11:19,277 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:11:19" (2/2) ... [2024-06-21 21:11:19,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c709415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19, skipping insertion in model container [2024-06-21 21:11:19,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:11:19" (2/2) ... [2024-06-21 21:11:19,278 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:11:19,379 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:11:19,380 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ((((((((((((((((((((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-21 21:11:19,381 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-21 21:11:19,381 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-21 21:11:19,381 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || ((z == 0 || z == 1) || z == 2)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff0_thd4 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$r_buff1_thd4 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)) && (a == 0 || a == 1)) && (b == 0 || b == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 2)) && (x$w_buff1 == 0 || x$w_buff1 == 2)) && (y == 0 || y == 1)) && ((x == 0 || x == 1) || x == 2)) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 2))) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 2))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0) [2024-06-21 21:11:19,381 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:11:19,382 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-21 21:11:19,421 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:11:19,736 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:11:19,745 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:11:19,854 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:11:19,898 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:11:19,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19 WrapperNode [2024-06-21 21:11:19,899 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:11:19,900 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:11:19,900 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:11:19,900 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:11:19,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:19,935 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:19,977 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 158 [2024-06-21 21:11:19,978 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:11:19,979 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:11:19,979 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:11:19,979 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:11:19,987 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:19,988 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:19,992 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:20,017 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 21:11:20,017 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:20,017 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:20,040 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:20,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:20,043 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:20,045 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:20,049 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:11:20,052 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:11:20,053 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:11:20,053 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:11:20,059 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (1/1) ... [2024-06-21 21:11:20,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:11:20,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:11:20,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:11:20,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:11:20,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:11:20,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:11:20,116 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:11:20,116 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:11:20,116 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:11:20,117 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:11:20,117 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:11:20,117 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:11:20,117 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:11:20,117 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:11:20,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:11:20,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:11:20,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:11:20,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:11:20,119 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:11:20,239 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:11:20,241 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:11:20,651 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:11:20,651 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:11:20,796 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:11:20,796 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:11:20,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:11:20 BoogieIcfgContainer [2024-06-21 21:11:20,797 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:11:20,826 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:11:20,826 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:11:20,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:11:20,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:11:17" (1/4) ... [2024-06-21 21:11:20,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285ecf38 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:11:20, skipping insertion in model container [2024-06-21 21:11:20,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:11:19" (2/4) ... [2024-06-21 21:11:20,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285ecf38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:11:20, skipping insertion in model container [2024-06-21 21:11:20,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:11:19" (3/4) ... [2024-06-21 21:11:20,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285ecf38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:11:20, skipping insertion in model container [2024-06-21 21:11:20,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:11:20" (4/4) ... [2024-06-21 21:11:20,832 INFO L112 eAbstractionObserver]: Analyzing ICFG mix044_tso.oepc.i [2024-06-21 21:11:20,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:11:20,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:11:20,848 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:11:20,888 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:11:20,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 21:11:20,946 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-21 21:11:20,946 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:11:20,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:11:20,949 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-21 21:11:20,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-21 21:11:20,964 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:11:20,970 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;@598c03a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:11:20,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:11:20,974 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:11:20,974 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:11:20,974 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:11:20,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:20,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:11:20,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:20,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash 404737091, now seen corresponding path program 1 times [2024-06-21 21:11:20,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:20,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516268757] [2024-06-21 21:11:20,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:20,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:21,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:21,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516268757] [2024-06-21 21:11:21,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516268757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:21,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:21,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:11:21,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717692539] [2024-06-21 21:11:21,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:21,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:11:21,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:11:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:11:22,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-21 21:11:22,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:22,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:22,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-21 21:11:22,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:23,769 INFO L124 PetriNetUnfolderBase]: 11595/16341 cut-off events. [2024-06-21 21:11:23,769 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-06-21 21:11:23,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32477 conditions, 16341 events. 11595/16341 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 91840 event pairs, 9068 based on Foata normal form. 1/15878 useless extension candidates. Maximal degree in co-relation 32464. Up to 15685 conditions per place. [2024-06-21 21:11:23,862 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-21 21:11:23,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-21 21:11:23,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:11:23,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:11:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-21 21:11:23,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-06-21 21:11:23,873 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 95 transitions. [2024-06-21 21:11:23,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-21 21:11:23,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:11:23,880 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-21 21:11:23,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-21 21:11:23,883 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-21 21:11:23,884 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-21 21:11:23,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:23,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:23,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:23,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:11:23,884 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:23,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1888331258, now seen corresponding path program 1 times [2024-06-21 21:11:23,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:23,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067085305] [2024-06-21 21:11:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:23,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:23,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:24,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:24,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067085305] [2024-06-21 21:11:24,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067085305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:24,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:24,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:11:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426771736] [2024-06-21 21:11:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:24,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:11:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:11:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:11:24,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 21:11:24,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:24,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:24,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 21:11:24,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:26,235 INFO L124 PetriNetUnfolderBase]: 13277/18267 cut-off events. [2024-06-21 21:11:26,235 INFO L125 PetriNetUnfolderBase]: For 3270/3270 co-relation queries the response was YES. [2024-06-21 21:11:26,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41086 conditions, 18267 events. 13277/18267 cut-off events. For 3270/3270 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99590 event pairs, 9539 based on Foata normal form. 4/18058 useless extension candidates. Maximal degree in co-relation 41074. Up to 17882 conditions per place. [2024-06-21 21:11:26,335 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-21 21:11:26,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-21 21:11:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:11:26,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:11:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-21 21:11:26,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-21 21:11:26,339 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 120 transitions. [2024-06-21 21:11:26,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-21 21:11:26,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:11:26,342 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-21 21:11:26,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-21 21:11:26,343 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-21 21:11:26,344 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-21 21:11:26,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:26,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:26,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:26,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:11:26,346 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:26,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:26,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1591273896, now seen corresponding path program 1 times [2024-06-21 21:11:26,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:26,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044324076] [2024-06-21 21:11:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:26,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:27,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:27,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044324076] [2024-06-21 21:11:27,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044324076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:27,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:27,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:11:27,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924070227] [2024-06-21 21:11:27,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:27,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:11:27,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:27,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:11:27,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:11:27,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 21:11:27,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2024-06-21 21:11:27,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:27,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 21:11:27,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:28,827 INFO L124 PetriNetUnfolderBase]: 13257/18241 cut-off events. [2024-06-21 21:11:28,827 INFO L125 PetriNetUnfolderBase]: For 9337/9337 co-relation queries the response was YES. [2024-06-21 21:11:28,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45445 conditions, 18241 events. 13257/18241 cut-off events. For 9337/9337 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99459 event pairs, 7685 based on Foata normal form. 8/18036 useless extension candidates. Maximal degree in co-relation 45431. Up to 17812 conditions per place. [2024-06-21 21:11:28,903 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 66 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-06-21 21:11:28,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 439 flow [2024-06-21 21:11:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:11:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:11:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-21 21:11:28,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584905660377358 [2024-06-21 21:11:28,905 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 148 transitions. [2024-06-21 21:11:28,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 439 flow [2024-06-21 21:11:28,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 420 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 21:11:28,908 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 229 flow [2024-06-21 21:11:28,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-21 21:11:28,909 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-06-21 21:11:28,909 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 229 flow [2024-06-21 21:11:28,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2024-06-21 21:11:28,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:28,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:28,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:11:28,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:28,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash -647641013, now seen corresponding path program 1 times [2024-06-21 21:11:28,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:28,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207221827] [2024-06-21 21:11:28,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:28,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:29,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:29,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207221827] [2024-06-21 21:11:29,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207221827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:29,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:29,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:11:29,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502490794] [2024-06-21 21:11:29,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:29,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:11:29,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:29,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:11:29,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:11:30,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-21 21:11:30,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:30,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:30,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-21 21:11:30,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:31,831 INFO L124 PetriNetUnfolderBase]: 13241/18215 cut-off events. [2024-06-21 21:11:31,832 INFO L125 PetriNetUnfolderBase]: For 18123/18123 co-relation queries the response was YES. [2024-06-21 21:11:31,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49763 conditions, 18215 events. 13241/18215 cut-off events. For 18123/18123 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99291 event pairs, 6594 based on Foata normal form. 8/18010 useless extension candidates. Maximal degree in co-relation 49748. Up to 17746 conditions per place. [2024-06-21 21:11:31,961 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 73 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-21 21:11:31,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 96 transitions, 523 flow [2024-06-21 21:11:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:11:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:11:31,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-21 21:11:31,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-06-21 21:11:31,965 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 229 flow. Second operand 6 states and 171 transitions. [2024-06-21 21:11:31,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 96 transitions, 523 flow [2024-06-21 21:11:31,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 96 transitions, 490 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 21:11:31,973 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 260 flow [2024-06-21 21:11:31,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-21 21:11:31,975 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-21 21:11:31,975 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 260 flow [2024-06-21 21:11:31,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.142857142857142) internal successors, (99), 7 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:31,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:31,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:31,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:11:31,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:31,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash -852927830, now seen corresponding path program 1 times [2024-06-21 21:11:31,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:31,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686404589] [2024-06-21 21:11:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:31,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:32,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:32,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686404589] [2024-06-21 21:11:32,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686404589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:32,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:32,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:11:32,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585351244] [2024-06-21 21:11:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:32,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:11:32,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:32,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:11:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:11:32,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-21 21:11:32,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:32,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:32,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-21 21:11:32,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:34,439 INFO L124 PetriNetUnfolderBase]: 11540/16271 cut-off events. [2024-06-21 21:11:34,440 INFO L125 PetriNetUnfolderBase]: For 24701/24701 co-relation queries the response was YES. [2024-06-21 21:11:34,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47319 conditions, 16271 events. 11540/16271 cut-off events. For 24701/24701 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 91442 event pairs, 6838 based on Foata normal form. 3/16031 useless extension candidates. Maximal degree in co-relation 47302. Up to 15592 conditions per place. [2024-06-21 21:11:34,521 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 61 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-21 21:11:34,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 472 flow [2024-06-21 21:11:34,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:11:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:11:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-21 21:11:34,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-06-21 21:11:34,526 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 260 flow. Second operand 5 states and 123 transitions. [2024-06-21 21:11:34,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 472 flow [2024-06-21 21:11:34,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 426 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:11:34,532 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 279 flow [2024-06-21 21:11:34,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-21 21:11:34,535 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-21 21:11:34,535 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 279 flow [2024-06-21 21:11:34,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:34,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:34,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:34,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:11:34,536 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:34,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:34,537 INFO L85 PathProgramCache]: Analyzing trace with hash 669428553, now seen corresponding path program 1 times [2024-06-21 21:11:34,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:34,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921550476] [2024-06-21 21:11:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:34,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:35,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:35,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921550476] [2024-06-21 21:11:35,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921550476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:35,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:35,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:11:35,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32999996] [2024-06-21 21:11:35,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:35,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:11:35,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:35,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:11:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:11:35,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:11:35,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:35,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:35,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:11:35,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:36,834 INFO L124 PetriNetUnfolderBase]: 13254/18233 cut-off events. [2024-06-21 21:11:36,834 INFO L125 PetriNetUnfolderBase]: For 40915/40915 co-relation queries the response was YES. [2024-06-21 21:11:36,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57582 conditions, 18233 events. 13254/18233 cut-off events. For 40915/40915 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99296 event pairs, 7831 based on Foata normal form. 3/18023 useless extension candidates. Maximal degree in co-relation 57563. Up to 17833 conditions per place. [2024-06-21 21:11:36,942 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 72 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-06-21 21:11:36,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 553 flow [2024-06-21 21:11:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:11:36,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:11:36,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 21:11:36,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-21 21:11:36,943 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 279 flow. Second operand 6 states and 144 transitions. [2024-06-21 21:11:36,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 553 flow [2024-06-21 21:11:36,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 520 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 21:11:36,949 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 325 flow [2024-06-21 21:11:36,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-21 21:11:36,950 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-21 21:11:36,950 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 325 flow [2024-06-21 21:11:36,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:36,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:36,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:36,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:11:36,951 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:36,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:36,951 INFO L85 PathProgramCache]: Analyzing trace with hash 675142473, now seen corresponding path program 2 times [2024-06-21 21:11:36,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:36,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481633169] [2024-06-21 21:11:36,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:36,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:37,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:37,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481633169] [2024-06-21 21:11:37,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481633169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:37,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:37,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:11:37,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240695923] [2024-06-21 21:11:37,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:37,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:11:37,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:37,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:11:37,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:11:37,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:11:37,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 325 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:37,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:37,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:11:37,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:39,251 INFO L124 PetriNetUnfolderBase]: 13245/18224 cut-off events. [2024-06-21 21:11:39,251 INFO L125 PetriNetUnfolderBase]: For 55338/55350 co-relation queries the response was YES. [2024-06-21 21:11:39,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61876 conditions, 18224 events. 13245/18224 cut-off events. For 55338/55350 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 99241 event pairs, 7773 based on Foata normal form. 11/18019 useless extension candidates. Maximal degree in co-relation 61856. Up to 17791 conditions per place. [2024-06-21 21:11:39,374 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 66 selfloop transitions, 23 changer transitions 0/95 dead transitions. [2024-06-21 21:11:39,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 621 flow [2024-06-21 21:11:39,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:11:39,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:11:39,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 21:11:39,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42048517520215634 [2024-06-21 21:11:39,376 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 325 flow. Second operand 7 states and 156 transitions. [2024-06-21 21:11:39,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 621 flow [2024-06-21 21:11:39,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 570 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:11:39,385 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 396 flow [2024-06-21 21:11:39,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=396, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-06-21 21:11:39,386 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-21 21:11:39,386 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 396 flow [2024-06-21 21:11:39,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:39,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:39,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:39,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:11:39,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:39,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:39,387 INFO L85 PathProgramCache]: Analyzing trace with hash 675150409, now seen corresponding path program 1 times [2024-06-21 21:11:39,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:39,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393593594] [2024-06-21 21:11:39,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:39,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:40,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:40,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393593594] [2024-06-21 21:11:40,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393593594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:40,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:40,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:11:40,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867565301] [2024-06-21 21:11:40,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:40,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:11:40,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:40,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:11:40,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:11:40,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:11:40,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 396 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:40,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:40,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:11:40,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:42,533 INFO L124 PetriNetUnfolderBase]: 14028/19651 cut-off events. [2024-06-21 21:11:42,533 INFO L125 PetriNetUnfolderBase]: For 73736/73736 co-relation queries the response was YES. [2024-06-21 21:11:42,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69761 conditions, 19651 events. 14028/19651 cut-off events. For 73736/73736 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 109736 event pairs, 8109 based on Foata normal form. 3/19363 useless extension candidates. Maximal degree in co-relation 69739. Up to 18870 conditions per place. [2024-06-21 21:11:42,663 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 86 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2024-06-21 21:11:42,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 110 transitions, 748 flow [2024-06-21 21:11:42,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:11:42,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:11:42,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 21:11:42,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393530997304582 [2024-06-21 21:11:42,665 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 396 flow. Second operand 7 states and 163 transitions. [2024-06-21 21:11:42,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 110 transitions, 748 flow [2024-06-21 21:11:42,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 110 transitions, 681 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 21:11:42,680 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 452 flow [2024-06-21 21:11:42,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=452, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-21 21:11:42,680 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-21 21:11:42,681 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 452 flow [2024-06-21 21:11:42,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:42,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:42,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:42,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:11:42,681 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:42,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:42,682 INFO L85 PathProgramCache]: Analyzing trace with hash -722670197, now seen corresponding path program 1 times [2024-06-21 21:11:42,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:42,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679756266] [2024-06-21 21:11:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:42,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:43,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:43,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679756266] [2024-06-21 21:11:43,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679756266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:43,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:43,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:11:43,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527674712] [2024-06-21 21:11:43,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:43,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:11:43,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:11:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:11:43,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:11:43,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 452 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:43,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:43,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:11:43,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:45,526 INFO L124 PetriNetUnfolderBase]: 15892/21827 cut-off events. [2024-06-21 21:11:45,526 INFO L125 PetriNetUnfolderBase]: For 111446/111462 co-relation queries the response was YES. [2024-06-21 21:11:45,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85070 conditions, 21827 events. 15892/21827 cut-off events. For 111446/111462 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 120616 event pairs, 7914 based on Foata normal form. 6/21578 useless extension candidates. Maximal degree in co-relation 85045. Up to 21295 conditions per place. [2024-06-21 21:11:45,677 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 95 selfloop transitions, 23 changer transitions 0/125 dead transitions. [2024-06-21 21:11:45,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 125 transitions, 855 flow [2024-06-21 21:11:45,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:11:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:11:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 21:11:45,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-21 21:11:45,679 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 452 flow. Second operand 7 states and 171 transitions. [2024-06-21 21:11:45,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 125 transitions, 855 flow [2024-06-21 21:11:45,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 794 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 21:11:45,692 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 526 flow [2024-06-21 21:11:45,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=526, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-21 21:11:45,693 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-21 21:11:45,693 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 526 flow [2024-06-21 21:11:45,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:45,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:45,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:45,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:11:45,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:45,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:45,694 INFO L85 PathProgramCache]: Analyzing trace with hash -722550227, now seen corresponding path program 2 times [2024-06-21 21:11:45,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:45,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864182177] [2024-06-21 21:11:45,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:45,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:46,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:46,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864182177] [2024-06-21 21:11:46,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864182177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:46,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:46,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:11:46,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542579193] [2024-06-21 21:11:46,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:46,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:11:46,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:46,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:11:46,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:11:46,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:11:46,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 526 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:46,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:46,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:11:46,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:48,624 INFO L124 PetriNetUnfolderBase]: 16048/22045 cut-off events. [2024-06-21 21:11:48,625 INFO L125 PetriNetUnfolderBase]: For 143897/143913 co-relation queries the response was YES. [2024-06-21 21:11:48,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92968 conditions, 22045 events. 16048/22045 cut-off events. For 143897/143913 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 121926 event pairs, 7859 based on Foata normal form. 28/21818 useless extension candidates. Maximal degree in co-relation 92941. Up to 21322 conditions per place. [2024-06-21 21:11:48,815 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 98 selfloop transitions, 32 changer transitions 0/137 dead transitions. [2024-06-21 21:11:48,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 137 transitions, 1075 flow [2024-06-21 21:11:48,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:11:48,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:11:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 21:11:48,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-21 21:11:48,817 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 526 flow. Second operand 7 states and 176 transitions. [2024-06-21 21:11:48,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 137 transitions, 1075 flow [2024-06-21 21:11:48,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 137 transitions, 1011 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:11:48,841 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 684 flow [2024-06-21 21:11:48,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=684, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2024-06-21 21:11:48,842 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-21 21:11:48,842 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 684 flow [2024-06-21 21:11:48,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:48,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:48,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:48,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:11:48,843 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:48,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:48,843 INFO L85 PathProgramCache]: Analyzing trace with hash -545418707, now seen corresponding path program 3 times [2024-06-21 21:11:48,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:48,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753646601] [2024-06-21 21:11:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:48,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:49,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:49,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753646601] [2024-06-21 21:11:49,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753646601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:49,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:49,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:11:49,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31207539] [2024-06-21 21:11:49,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:49,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:11:49,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:49,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:11:49,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:11:49,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:11:49,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 684 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:49,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:49,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:11:49,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:51,803 INFO L124 PetriNetUnfolderBase]: 16086/22046 cut-off events. [2024-06-21 21:11:51,804 INFO L125 PetriNetUnfolderBase]: For 182526/182570 co-relation queries the response was YES. [2024-06-21 21:11:51,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100903 conditions, 22046 events. 16086/22046 cut-off events. For 182526/182570 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 121296 event pairs, 7409 based on Foata normal form. 28/21824 useless extension candidates. Maximal degree in co-relation 100874. Up to 21184 conditions per place. [2024-06-21 21:11:51,962 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 90 selfloop transitions, 54 changer transitions 0/151 dead transitions. [2024-06-21 21:11:51,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 151 transitions, 1371 flow [2024-06-21 21:11:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:11:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:11:51,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 21:11:51,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-21 21:11:51,964 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 684 flow. Second operand 8 states and 196 transitions. [2024-06-21 21:11:51,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 151 transitions, 1371 flow [2024-06-21 21:11:52,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 151 transitions, 1300 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-21 21:11:52,006 INFO L231 Difference]: Finished difference. Result has 92 places, 109 transitions, 917 flow [2024-06-21 21:11:52,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=917, PETRI_PLACES=92, PETRI_TRANSITIONS=109} [2024-06-21 21:11:52,006 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-06-21 21:11:52,006 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 109 transitions, 917 flow [2024-06-21 21:11:52,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:52,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:52,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:52,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:11:52,007 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:52,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:52,007 INFO L85 PathProgramCache]: Analyzing trace with hash -545172443, now seen corresponding path program 1 times [2024-06-21 21:11:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:52,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732499146] [2024-06-21 21:11:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:52,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:52,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:53,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:53,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:53,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732499146] [2024-06-21 21:11:53,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732499146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:53,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:53,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:11:53,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219569994] [2024-06-21 21:11:53,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:53,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:11:53,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:53,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:11:53,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:11:53,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:11:53,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 109 transitions, 917 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:53,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:53,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:11:53,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:55,429 INFO L124 PetriNetUnfolderBase]: 14420/19926 cut-off events. [2024-06-21 21:11:55,430 INFO L125 PetriNetUnfolderBase]: For 187950/187950 co-relation queries the response was YES. [2024-06-21 21:11:55,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95179 conditions, 19926 events. 14420/19926 cut-off events. For 187950/187950 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 109121 event pairs, 6558 based on Foata normal form. 6/19728 useless extension candidates. Maximal degree in co-relation 95146. Up to 19377 conditions per place. [2024-06-21 21:11:55,580 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 124 selfloop transitions, 21 changer transitions 0/151 dead transitions. [2024-06-21 21:11:55,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 151 transitions, 1369 flow [2024-06-21 21:11:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:11:55,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:11:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-21 21:11:55,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363207547169811 [2024-06-21 21:11:55,583 INFO L175 Difference]: Start difference. First operand has 92 places, 109 transitions, 917 flow. Second operand 8 states and 185 transitions. [2024-06-21 21:11:55,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 151 transitions, 1369 flow [2024-06-21 21:11:55,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 151 transitions, 1231 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-21 21:11:55,674 INFO L231 Difference]: Finished difference. Result has 97 places, 112 transitions, 893 flow [2024-06-21 21:11:55,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=893, PETRI_PLACES=97, PETRI_TRANSITIONS=112} [2024-06-21 21:11:55,674 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-21 21:11:55,674 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 112 transitions, 893 flow [2024-06-21 21:11:55,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:55,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:55,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:55,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:11:55,675 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:55,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1266290428, now seen corresponding path program 1 times [2024-06-21 21:11:55,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:55,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588788425] [2024-06-21 21:11:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:55,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:56,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:56,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588788425] [2024-06-21 21:11:56,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588788425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:56,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:56,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:11:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713011798] [2024-06-21 21:11:56,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:56,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:11:56,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:56,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:11:56,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:11:56,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:11:56,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 112 transitions, 893 flow. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:56,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:56,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:11:56,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:58,542 INFO L124 PetriNetUnfolderBase]: 14413/20233 cut-off events. [2024-06-21 21:11:58,542 INFO L125 PetriNetUnfolderBase]: For 193608/193608 co-relation queries the response was YES. [2024-06-21 21:11:58,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95165 conditions, 20233 events. 14413/20233 cut-off events. For 193608/193608 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 113583 event pairs, 6665 based on Foata normal form. 2/20031 useless extension candidates. Maximal degree in co-relation 95130. Up to 19434 conditions per place. [2024-06-21 21:11:58,706 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 114 selfloop transitions, 10 changer transitions 0/130 dead transitions. [2024-06-21 21:11:58,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 1229 flow [2024-06-21 21:11:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:11:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:11:58,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-21 21:11:58,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339622641509434 [2024-06-21 21:11:58,708 INFO L175 Difference]: Start difference. First operand has 97 places, 112 transitions, 893 flow. Second operand 5 states and 115 transitions. [2024-06-21 21:11:58,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 1229 flow [2024-06-21 21:11:58,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1145 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 21:11:58,778 INFO L231 Difference]: Finished difference. Result has 96 places, 116 transitions, 892 flow [2024-06-21 21:11:58,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=892, PETRI_PLACES=96, PETRI_TRANSITIONS=116} [2024-06-21 21:11:58,779 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-21 21:11:58,779 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 116 transitions, 892 flow [2024-06-21 21:11:58,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:58,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:58,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:58,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:11:58,780 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:11:58,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:58,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1528948144, now seen corresponding path program 1 times [2024-06-21 21:11:58,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:58,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672621630] [2024-06-21 21:11:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:58,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:59,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:59,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672621630] [2024-06-21 21:11:59,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672621630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:59,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:59,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:11:59,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968618556] [2024-06-21 21:11:59,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:59,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:11:59,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:59,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:11:59,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:12:00,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:12:00,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 116 transitions, 892 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:00,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:00,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:12:00,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:02,492 INFO L124 PetriNetUnfolderBase]: 16105/22154 cut-off events. [2024-06-21 21:12:02,492 INFO L125 PetriNetUnfolderBase]: For 261029/261061 co-relation queries the response was YES. [2024-06-21 21:12:02,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113141 conditions, 22154 events. 16105/22154 cut-off events. For 261029/261061 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 122699 event pairs, 7085 based on Foata normal form. 11/21969 useless extension candidates. Maximal degree in co-relation 113105. Up to 21576 conditions per place. [2024-06-21 21:12:02,682 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 122 selfloop transitions, 27 changer transitions 0/156 dead transitions. [2024-06-21 21:12:02,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 156 transitions, 1361 flow [2024-06-21 21:12:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:12:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:12:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 21:12:02,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-21 21:12:02,684 INFO L175 Difference]: Start difference. First operand has 96 places, 116 transitions, 892 flow. Second operand 7 states and 171 transitions. [2024-06-21 21:12:02,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 156 transitions, 1361 flow [2024-06-21 21:12:02,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 156 transitions, 1308 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 21:12:02,779 INFO L231 Difference]: Finished difference. Result has 100 places, 120 transitions, 986 flow [2024-06-21 21:12:02,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=839, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=986, PETRI_PLACES=100, PETRI_TRANSITIONS=120} [2024-06-21 21:12:02,780 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-21 21:12:02,780 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 120 transitions, 986 flow [2024-06-21 21:12:02,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:02,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:02,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:02,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:12:02,780 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:12:02,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1532763376, now seen corresponding path program 1 times [2024-06-21 21:12:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:02,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239178375] [2024-06-21 21:12:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:02,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:03,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:03,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239178375] [2024-06-21 21:12:03,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239178375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:03,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:03,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:12:03,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858291673] [2024-06-21 21:12:03,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:03,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:12:03,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:03,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:12:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:12:03,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-21 21:12:03,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 120 transitions, 986 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:03,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:03,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-21 21:12:03,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:06,363 INFO L124 PetriNetUnfolderBase]: 16426/22489 cut-off events. [2024-06-21 21:12:06,364 INFO L125 PetriNetUnfolderBase]: For 278170/278170 co-relation queries the response was YES. [2024-06-21 21:12:06,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113803 conditions, 22489 events. 16426/22489 cut-off events. For 278170/278170 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 121166 event pairs, 7457 based on Foata normal form. 3/22300 useless extension candidates. Maximal degree in co-relation 113766. Up to 22023 conditions per place. [2024-06-21 21:12:06,598 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 139 selfloop transitions, 23 changer transitions 0/167 dead transitions. [2024-06-21 21:12:06,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 167 transitions, 1503 flow [2024-06-21 21:12:06,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:12:06,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:12:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 21:12:06,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268867924528302 [2024-06-21 21:12:06,601 INFO L175 Difference]: Start difference. First operand has 100 places, 120 transitions, 986 flow. Second operand 8 states and 181 transitions. [2024-06-21 21:12:06,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 167 transitions, 1503 flow [2024-06-21 21:12:06,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 167 transitions, 1415 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 21:12:06,726 INFO L231 Difference]: Finished difference. Result has 104 places, 127 transitions, 1051 flow [2024-06-21 21:12:06,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1051, PETRI_PLACES=104, PETRI_TRANSITIONS=127} [2024-06-21 21:12:06,727 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-21 21:12:06,727 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 127 transitions, 1051 flow [2024-06-21 21:12:06,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:06,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:06,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:06,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:12:06,728 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:12:06,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash 279514920, now seen corresponding path program 2 times [2024-06-21 21:12:06,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:06,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462977549] [2024-06-21 21:12:06,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:06,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:07,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:07,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462977549] [2024-06-21 21:12:07,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462977549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:07,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:07,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:12:07,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857348490] [2024-06-21 21:12:07,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:07,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:12:07,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:12:07,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:12:08,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-21 21:12:08,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 127 transitions, 1051 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:08,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:08,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-21 21:12:08,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:10,510 INFO L124 PetriNetUnfolderBase]: 16448/22514 cut-off events. [2024-06-21 21:12:10,511 INFO L125 PetriNetUnfolderBase]: For 303788/303800 co-relation queries the response was YES. [2024-06-21 21:12:10,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116532 conditions, 22514 events. 16448/22514 cut-off events. For 303788/303800 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 121356 event pairs, 7161 based on Foata normal form. 11/22329 useless extension candidates. Maximal degree in co-relation 116493. Up to 21527 conditions per place. [2024-06-21 21:12:10,687 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 108 selfloop transitions, 83 changer transitions 0/196 dead transitions. [2024-06-21 21:12:10,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 196 transitions, 1842 flow [2024-06-21 21:12:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:12:10,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:12:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-21 21:12:10,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455188679245283 [2024-06-21 21:12:10,689 INFO L175 Difference]: Start difference. First operand has 104 places, 127 transitions, 1051 flow. Second operand 8 states and 193 transitions. [2024-06-21 21:12:10,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 196 transitions, 1842 flow [2024-06-21 21:12:10,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 196 transitions, 1753 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 21:12:10,790 INFO L231 Difference]: Finished difference. Result has 108 places, 152 transitions, 1377 flow [2024-06-21 21:12:10,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1377, PETRI_PLACES=108, PETRI_TRANSITIONS=152} [2024-06-21 21:12:10,791 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-21 21:12:10,791 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 152 transitions, 1377 flow [2024-06-21 21:12:10,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:10,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:10,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:10,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:12:10,792 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:12:10,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:10,792 INFO L85 PathProgramCache]: Analyzing trace with hash 279248010, now seen corresponding path program 3 times [2024-06-21 21:12:10,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:10,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687999088] [2024-06-21 21:12:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:10,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:12,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:12,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:12,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687999088] [2024-06-21 21:12:12,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687999088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:12,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:12,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:12:12,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800287055] [2024-06-21 21:12:12,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:12,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:12:12,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:12:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:12:12,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-21 21:12:12,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 152 transitions, 1377 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:12,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:12,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-21 21:12:12,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:14,367 INFO L124 PetriNetUnfolderBase]: 16492/22572 cut-off events. [2024-06-21 21:12:14,367 INFO L125 PetriNetUnfolderBase]: For 333503/333515 co-relation queries the response was YES. [2024-06-21 21:12:14,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120174 conditions, 22572 events. 16492/22572 cut-off events. For 333503/333515 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 121621 event pairs, 7184 based on Foata normal form. 11/22393 useless extension candidates. Maximal degree in co-relation 120133. Up to 22038 conditions per place. [2024-06-21 21:12:14,607 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 153 selfloop transitions, 41 changer transitions 0/199 dead transitions. [2024-06-21 21:12:14,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 199 transitions, 1983 flow [2024-06-21 21:12:14,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:12:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:12:14,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-21 21:12:14,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268867924528302 [2024-06-21 21:12:14,609 INFO L175 Difference]: Start difference. First operand has 108 places, 152 transitions, 1377 flow. Second operand 8 states and 181 transitions. [2024-06-21 21:12:14,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 199 transitions, 1983 flow [2024-06-21 21:12:14,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 199 transitions, 1918 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 21:12:14,762 INFO L231 Difference]: Finished difference. Result has 115 places, 162 transitions, 1550 flow [2024-06-21 21:12:14,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1550, PETRI_PLACES=115, PETRI_TRANSITIONS=162} [2024-06-21 21:12:14,763 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-21 21:12:14,763 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 162 transitions, 1550 flow [2024-06-21 21:12:14,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:14,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:14,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:14,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:12:14,764 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:12:14,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:14,765 INFO L85 PathProgramCache]: Analyzing trace with hash 271896360, now seen corresponding path program 4 times [2024-06-21 21:12:14,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:14,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725114367] [2024-06-21 21:12:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:14,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:16,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:16,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725114367] [2024-06-21 21:12:16,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725114367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:16,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:16,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:12:16,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529805468] [2024-06-21 21:12:16,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:16,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:12:16,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:16,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:12:16,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:12:16,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-21 21:12:16,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 162 transitions, 1550 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:16,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:16,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-21 21:12:16,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:19,075 INFO L124 PetriNetUnfolderBase]: 16471/22542 cut-off events. [2024-06-21 21:12:19,076 INFO L125 PetriNetUnfolderBase]: For 355760/355772 co-relation queries the response was YES. [2024-06-21 21:12:19,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120243 conditions, 22542 events. 16471/22542 cut-off events. For 355760/355772 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 121357 event pairs, 7176 based on Foata normal form. 11/22363 useless extension candidates. Maximal degree in co-relation 120199. Up to 22008 conditions per place. [2024-06-21 21:12:19,254 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 157 selfloop transitions, 40 changer transitions 0/202 dead transitions. [2024-06-21 21:12:19,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 202 transitions, 2105 flow [2024-06-21 21:12:19,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:12:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:12:19,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 21:12:19,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42924528301886794 [2024-06-21 21:12:19,256 INFO L175 Difference]: Start difference. First operand has 115 places, 162 transitions, 1550 flow. Second operand 8 states and 182 transitions. [2024-06-21 21:12:19,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 202 transitions, 2105 flow [2024-06-21 21:12:19,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 202 transitions, 2013 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 21:12:19,410 INFO L231 Difference]: Finished difference. Result has 120 places, 165 transitions, 1620 flow [2024-06-21 21:12:19,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1458, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1620, PETRI_PLACES=120, PETRI_TRANSITIONS=165} [2024-06-21 21:12:19,411 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-21 21:12:19,411 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 165 transitions, 1620 flow [2024-06-21 21:12:19,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:19,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:19,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:19,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:12:19,411 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:12:19,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:19,412 INFO L85 PathProgramCache]: Analyzing trace with hash -600295672, now seen corresponding path program 1 times [2024-06-21 21:12:19,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:19,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914332715] [2024-06-21 21:12:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:19,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:20,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:20,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914332715] [2024-06-21 21:12:20,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914332715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:20,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:20,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:12:20,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329751820] [2024-06-21 21:12:20,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:20,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:12:20,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:12:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:12:20,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:12:20,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 165 transitions, 1620 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:20,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:20,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:12:20,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:22,758 INFO L124 PetriNetUnfolderBase]: 14425/20363 cut-off events. [2024-06-21 21:12:22,758 INFO L125 PetriNetUnfolderBase]: For 328954/328954 co-relation queries the response was YES. [2024-06-21 21:12:22,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108601 conditions, 20363 events. 14425/20363 cut-off events. For 328954/328954 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 114809 event pairs, 6089 based on Foata normal form. 6/20163 useless extension candidates. Maximal degree in co-relation 108556. Up to 19400 conditions per place. [2024-06-21 21:12:22,915 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 173 selfloop transitions, 22 changer transitions 0/201 dead transitions. [2024-06-21 21:12:22,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 201 transitions, 2278 flow [2024-06-21 21:12:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:12:22,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:12:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 21:12:22,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-06-21 21:12:22,918 INFO L175 Difference]: Start difference. First operand has 120 places, 165 transitions, 1620 flow. Second operand 6 states and 142 transitions. [2024-06-21 21:12:22,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 201 transitions, 2278 flow [2024-06-21 21:12:23,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 201 transitions, 2124 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 21:12:23,097 INFO L231 Difference]: Finished difference. Result has 120 places, 179 transitions, 1690 flow [2024-06-21 21:12:23,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1466, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1690, PETRI_PLACES=120, PETRI_TRANSITIONS=179} [2024-06-21 21:12:23,098 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-21 21:12:23,098 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 179 transitions, 1690 flow [2024-06-21 21:12:23,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:23,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:23,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:23,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:12:23,098 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:12:23,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1295822218, now seen corresponding path program 1 times [2024-06-21 21:12:23,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:23,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178069141] [2024-06-21 21:12:23,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:23,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:24,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:24,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178069141] [2024-06-21 21:12:24,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178069141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:24,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:24,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:24,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703809381] [2024-06-21 21:12:24,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:24,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:24,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:24,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:24,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:24,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:12:24,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 179 transitions, 1690 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:24,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:24,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:12:24,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:27,681 INFO L124 PetriNetUnfolderBase]: 15958/22371 cut-off events. [2024-06-21 21:12:27,682 INFO L125 PetriNetUnfolderBase]: For 455877/455897 co-relation queries the response was YES. [2024-06-21 21:12:27,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129354 conditions, 22371 events. 15958/22371 cut-off events. For 455877/455897 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 126553 event pairs, 6934 based on Foata normal form. 14/22359 useless extension candidates. Maximal degree in co-relation 129308. Up to 21408 conditions per place. [2024-06-21 21:12:27,876 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 195 selfloop transitions, 36 changer transitions 0/241 dead transitions. [2024-06-21 21:12:27,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 241 transitions, 2480 flow [2024-06-21 21:12:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:27,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-21 21:12:27,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339622641509434 [2024-06-21 21:12:27,893 INFO L175 Difference]: Start difference. First operand has 120 places, 179 transitions, 1690 flow. Second operand 9 states and 207 transitions. [2024-06-21 21:12:27,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 241 transitions, 2480 flow [2024-06-21 21:12:28,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 241 transitions, 2434 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-21 21:12:28,139 INFO L231 Difference]: Finished difference. Result has 131 places, 197 transitions, 1973 flow [2024-06-21 21:12:28,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1973, PETRI_PLACES=131, PETRI_TRANSITIONS=197} [2024-06-21 21:12:28,139 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-21 21:12:28,140 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 197 transitions, 1973 flow [2024-06-21 21:12:28,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:28,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:28,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:28,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:12:28,141 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:12:28,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:28,141 INFO L85 PathProgramCache]: Analyzing trace with hash -74785270, now seen corresponding path program 2 times [2024-06-21 21:12:28,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:28,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456065489] [2024-06-21 21:12:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:28,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:29,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:29,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456065489] [2024-06-21 21:12:29,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456065489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:29,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:29,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:29,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028815655] [2024-06-21 21:12:29,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:29,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:29,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:29,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:29,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:29,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:12:29,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 197 transitions, 1973 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:29,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:29,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:12:29,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:32,646 INFO L124 PetriNetUnfolderBase]: 16227/22782 cut-off events. [2024-06-21 21:12:32,647 INFO L125 PetriNetUnfolderBase]: For 513273/513301 co-relation queries the response was YES. [2024-06-21 21:12:32,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136112 conditions, 22782 events. 16227/22782 cut-off events. For 513273/513301 co-relation queries the response was YES. Maximal size of possible extension queue 721. Compared 129771 event pairs, 6923 based on Foata normal form. 26/22789 useless extension candidates. Maximal degree in co-relation 136060. Up to 21665 conditions per place. [2024-06-21 21:12:33,095 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 208 selfloop transitions, 70 changer transitions 0/288 dead transitions. [2024-06-21 21:12:33,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 288 transitions, 3200 flow [2024-06-21 21:12:33,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:33,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:33,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 21:12:33,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570230607966457 [2024-06-21 21:12:33,097 INFO L175 Difference]: Start difference. First operand has 131 places, 197 transitions, 1973 flow. Second operand 9 states and 218 transitions. [2024-06-21 21:12:33,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 288 transitions, 3200 flow [2024-06-21 21:12:33,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 288 transitions, 2959 flow, removed 64 selfloop flow, removed 4 redundant places. [2024-06-21 21:12:33,420 INFO L231 Difference]: Finished difference. Result has 139 places, 237 transitions, 2498 flow [2024-06-21 21:12:33,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2498, PETRI_PLACES=139, PETRI_TRANSITIONS=237} [2024-06-21 21:12:33,422 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-21 21:12:33,422 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 237 transitions, 2498 flow [2024-06-21 21:12:33,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:33,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:33,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:33,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:12:33,423 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:12:33,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2117078102, now seen corresponding path program 3 times [2024-06-21 21:12:33,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:33,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287266628] [2024-06-21 21:12:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:33,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:34,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:34,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287266628] [2024-06-21 21:12:34,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287266628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:34,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:34,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:34,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982737198] [2024-06-21 21:12:34,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:34,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:34,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:34,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:34,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:34,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:12:34,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 237 transitions, 2498 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:34,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:34,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:12:34,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:37,738 INFO L124 PetriNetUnfolderBase]: 16248/23030 cut-off events. [2024-06-21 21:12:37,738 INFO L125 PetriNetUnfolderBase]: For 591624/591670 co-relation queries the response was YES. [2024-06-21 21:12:37,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140315 conditions, 23030 events. 16248/23030 cut-off events. For 591624/591670 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 133484 event pairs, 7985 based on Foata normal form. 50/23072 useless extension candidates. Maximal degree in co-relation 140259. Up to 21729 conditions per place. [2024-06-21 21:12:37,972 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 221 selfloop transitions, 99 changer transitions 0/330 dead transitions. [2024-06-21 21:12:37,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 330 transitions, 3812 flow [2024-06-21 21:12:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:37,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-21 21:12:37,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549266247379455 [2024-06-21 21:12:37,973 INFO L175 Difference]: Start difference. First operand has 139 places, 237 transitions, 2498 flow. Second operand 9 states and 217 transitions. [2024-06-21 21:12:37,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 330 transitions, 3812 flow [2024-06-21 21:12:38,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 330 transitions, 3597 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-21 21:12:38,560 INFO L231 Difference]: Finished difference. Result has 147 places, 279 transitions, 3121 flow [2024-06-21 21:12:38,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2369, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3121, PETRI_PLACES=147, PETRI_TRANSITIONS=279} [2024-06-21 21:12:38,561 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-21 21:12:38,561 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 279 transitions, 3121 flow [2024-06-21 21:12:38,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:38,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:38,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:38,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:12:38,562 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:12:38,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:38,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2104995542, now seen corresponding path program 4 times [2024-06-21 21:12:38,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:38,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960663646] [2024-06-21 21:12:38,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:38,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:39,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:39,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960663646] [2024-06-21 21:12:39,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960663646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:39,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:39,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:39,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398373325] [2024-06-21 21:12:39,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:39,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:39,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:39,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:39,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-21 21:12:39,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 279 transitions, 3121 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:39,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:39,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-21 21:12:39,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:43,580 INFO L124 PetriNetUnfolderBase]: 16715/23572 cut-off events. [2024-06-21 21:12:43,580 INFO L125 PetriNetUnfolderBase]: For 668786/668806 co-relation queries the response was YES. [2024-06-21 21:12:43,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150002 conditions, 23572 events. 16715/23572 cut-off events. For 668786/668806 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 136432 event pairs, 7943 based on Foata normal form. 24/23573 useless extension candidates. Maximal degree in co-relation 149943. Up to 22291 conditions per place.