./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix017_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix017_pso.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:04:18,367 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:04:18,441 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:04:18,445 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:04:18,445 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:04:18,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:04:18,466 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:04:18,467 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:04:18,467 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:04:18,470 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:04:18,470 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:04:18,471 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:04:18,471 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:04:18,472 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:04:18,473 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:04:18,473 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:04:18,473 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:04:18,473 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:04:18,474 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:04:18,474 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:04:18,474 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:04:18,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:04:18,475 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:04:18,475 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:04:18,475 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:04:18,475 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:04:18,475 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:04:18,476 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:04:18,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:04:18,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:04:18,477 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:04:18,477 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:04:18,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:04:18,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:04:18,478 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:04:18,478 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:04:18,478 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:04:18,478 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:04:18,479 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:04:18,479 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:04:18,479 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:04:18,479 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:04:18,479 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:04:18,479 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:04:18,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:04:18,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:04:18,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:04:18,690 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:04:18,691 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:04:18,692 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix017_pso.opt_tso.opt.yml/witness.yml [2024-06-14 12:04:18,840 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:04:18,841 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:04:18,841 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i [2024-06-14 12:04:19,847 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:04:20,032 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:04:20,048 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i [2024-06-14 12:04:20,063 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9163f880/ff64d842f7b248d9a0163ea616805cac/FLAGa73d7f95c [2024-06-14 12:04:20,077 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9163f880/ff64d842f7b248d9a0163ea616805cac [2024-06-14 12:04:20,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:04:20,078 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:04:20,080 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:04:20,081 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:04:20,084 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:04:20,085 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:04:18" (1/2) ... [2024-06-14 12:04:20,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e12484 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:04:20, skipping insertion in model container [2024-06-14 12:04:20,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:04:18" (1/2) ... [2024-06-14 12:04:20,087 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5141bf11 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:04:20, skipping insertion in model container [2024-06-14 12:04:20,087 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:04:20" (2/2) ... [2024-06-14 12:04:20,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e12484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20, skipping insertion in model container [2024-06-14 12:04:20,088 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:04:20" (2/2) ... [2024-06-14 12:04:20,089 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:04:20,194 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:04:20,195 INFO L97 edCorrectnessWitness]: Location invariant before [L873-L873] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 12:04:20,195 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 12:04:20,196 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 12:04:20,196 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-14 12:04:20,196 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:04:20,197 INFO L106 edCorrectnessWitness]: ghost_update [L867-L867] multithreaded = 1; [2024-06-14 12:04:20,234 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:04:20,534 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:04:20,542 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:04:20,673 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:04:20,714 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:04:20,715 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20 WrapperNode [2024-06-14 12:04:20,715 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:04:20,716 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:04:20,716 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:04:20,716 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:04:20,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,739 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,766 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 162 [2024-06-14 12:04:20,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:04:20,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:04:20,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:04:20,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:04:20,779 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,779 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,786 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,809 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:04:20,809 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,809 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,817 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,833 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,835 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,837 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,840 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:04:20,849 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:04:20,849 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:04:20,850 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:04:20,850 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (1/1) ... [2024-06-14 12:04:20,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:04:20,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:04:20,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:04:20,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:04:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:04:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:04:20,908 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:04:20,909 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:04:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:04:20,909 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:04:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:04:20,909 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:04:20,909 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:04:20,909 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:04:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:04:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:04:20,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:04:20,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:04:20,912 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:04:21,041 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:04:21,043 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:04:21,386 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:04:21,386 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:04:21,538 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:04:21,538 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:04:21,539 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:04:21 BoogieIcfgContainer [2024-06-14 12:04:21,539 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:04:21,541 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:04:21,541 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:04:21,544 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:04:21,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:04:18" (1/4) ... [2024-06-14 12:04:21,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aeec199 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:04:21, skipping insertion in model container [2024-06-14 12:04:21,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:04:20" (2/4) ... [2024-06-14 12:04:21,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aeec199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:04:21, skipping insertion in model container [2024-06-14 12:04:21,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:04:20" (3/4) ... [2024-06-14 12:04:21,545 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aeec199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:04:21, skipping insertion in model container [2024-06-14 12:04:21,545 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:04:21" (4/4) ... [2024-06-14 12:04:21,546 INFO L112 eAbstractionObserver]: Analyzing ICFG mix017_pso.opt_tso.opt.i [2024-06-14 12:04:21,559 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:04:21,559 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:04:21,559 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:04:21,612 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:04:21,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:04:21,675 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 12:04:21,675 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:04:21,678 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 84 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. [2024-06-14 12:04:21,678 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:04:21,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 12:04:21,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:04:21,698 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;@2389a0d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:04:21,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:04:21,702 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:04:21,702 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:04:21,703 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:04:21,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:21,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:04:21,704 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)] === [2024-06-14 12:04:21,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:21,708 INFO L85 PathProgramCache]: Analyzing trace with hash 22861328, now seen corresponding path program 1 times [2024-06-14 12:04:21,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:21,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729767917] [2024-06-14 12:04:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:21,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:22,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:22,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729767917] [2024-06-14 12:04:22,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729767917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:22,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:22,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:04:22,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906109109] [2024-06-14 12:04:22,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:22,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:04:22,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:22,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:04:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:04:22,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-14 12:04:22,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2024-06-14 12:04:22,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:22,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-14 12:04:22,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:23,699 INFO L124 PetriNetUnfolderBase]: 4867/7020 cut-off events. [2024-06-14 12:04:23,699 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-06-14 12:04:23,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13934 conditions, 7020 events. 4867/7020 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 40295 event pairs, 3534 based on Foata normal form. 1/6803 useless extension candidates. Maximal degree in co-relation 13918. Up to 6693 conditions per place. [2024-06-14 12:04:23,738 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-14 12:04:23,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 229 flow [2024-06-14 12:04:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:04:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:04:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-14 12:04:23,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-14 12:04:23,748 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 102 transitions. [2024-06-14 12:04:23,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 229 flow [2024-06-14 12:04:23,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:04:23,753 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 12:04:23,754 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} [2024-06-14 12:04:23,756 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 12:04:23,757 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 12:04:23,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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) [2024-06-14 12:04:23,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:23,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:23,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:04:23,757 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)] === [2024-06-14 12:04:23,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:23,758 INFO L85 PathProgramCache]: Analyzing trace with hash 494924143, now seen corresponding path program 1 times [2024-06-14 12:04:23,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:23,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486343231] [2024-06-14 12:04:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:23,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:24,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:24,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:24,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486343231] [2024-06-14 12:04:24,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486343231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:24,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:24,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:04:24,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759836840] [2024-06-14 12:04:24,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:24,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:04:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:24,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:04:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:04:24,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-14 12:04:24,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:24,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:24,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-14 12:04:24,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:25,436 INFO L124 PetriNetUnfolderBase]: 5569/7818 cut-off events. [2024-06-14 12:04:25,437 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2024-06-14 12:04:25,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18007 conditions, 7818 events. 5569/7818 cut-off events. For 1718/1718 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43661 event pairs, 3437 based on Foata normal form. 4/7795 useless extension candidates. Maximal degree in co-relation 17992. Up to 7610 conditions per place. [2024-06-14 12:04:25,482 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-14 12:04:25,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 323 flow [2024-06-14 12:04:25,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:04:25,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:04:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-14 12:04:25,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132075471698113 [2024-06-14 12:04:25,487 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 130 transitions. [2024-06-14 12:04:25,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 323 flow [2024-06-14 12:04:25,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:04:25,489 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-14 12:04:25,490 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} [2024-06-14 12:04:25,491 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-14 12:04:25,491 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-14 12:04:25,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:25,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:25,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:25,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:04:25,494 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)] === [2024-06-14 12:04:25,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:25,498 INFO L85 PathProgramCache]: Analyzing trace with hash -336763800, now seen corresponding path program 1 times [2024-06-14 12:04:25,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:25,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825681029] [2024-06-14 12:04:25,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:25,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:26,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:26,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:26,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825681029] [2024-06-14 12:04:26,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825681029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:26,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:26,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:04:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808100676] [2024-06-14 12:04:26,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:26,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:04:26,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:26,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:04:26,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:04:26,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:04:26,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:26,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:26,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:04:26,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:27,527 INFO L124 PetriNetUnfolderBase]: 7070/9854 cut-off events. [2024-06-14 12:04:27,527 INFO L125 PetriNetUnfolderBase]: For 5873/5873 co-relation queries the response was YES. [2024-06-14 12:04:27,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25290 conditions, 9854 events. 7070/9854 cut-off events. For 5873/5873 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 54462 event pairs, 3323 based on Foata normal form. 8/9826 useless extension candidates. Maximal degree in co-relation 25273. Up to 9556 conditions per place. [2024-06-14 12:04:27,576 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 71 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-14 12:04:27,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 488 flow [2024-06-14 12:04:27,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:04:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:04:27,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 12:04:27,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691823899371069 [2024-06-14 12:04:27,581 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 181 transitions. [2024-06-14 12:04:27,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 488 flow [2024-06-14 12:04:27,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 460 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 12:04:27,586 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-14 12:04:27,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-14 12:04:27,587 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-14 12:04:27,587 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-14 12:04:27,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:27,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:27,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:27,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:04:27,588 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:04:27,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash -594328058, now seen corresponding path program 1 times [2024-06-14 12:04:27,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:27,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270363065] [2024-06-14 12:04:27,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:27,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:28,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:28,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270363065] [2024-06-14 12:04:28,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270363065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:28,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:28,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:04:28,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018685520] [2024-06-14 12:04:28,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:28,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:04:28,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:04:28,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:04:28,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:04:28,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:28,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:28,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:04:28,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:29,425 INFO L124 PetriNetUnfolderBase]: 6156/8849 cut-off events. [2024-06-14 12:04:29,425 INFO L125 PetriNetUnfolderBase]: For 9447/9447 co-relation queries the response was YES. [2024-06-14 12:04:29,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24892 conditions, 8849 events. 6156/8849 cut-off events. For 9447/9447 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 50611 event pairs, 3157 based on Foata normal form. 3/8733 useless extension candidates. Maximal degree in co-relation 24873. Up to 8408 conditions per place. [2024-06-14 12:04:29,471 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-14 12:04:29,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 447 flow [2024-06-14 12:04:29,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:04:29,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:04:29,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-14 12:04:29,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-14 12:04:29,525 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 136 transitions. [2024-06-14 12:04:29,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 447 flow [2024-06-14 12:04:29,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:29,529 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-14 12:04:29,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, 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=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-14 12:04:29,530 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-14 12:04:29,530 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-14 12:04:29,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:29,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:29,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:29,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:04:29,531 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)] === [2024-06-14 12:04:29,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:29,531 INFO L85 PathProgramCache]: Analyzing trace with hash -616930185, now seen corresponding path program 1 times [2024-06-14 12:04:29,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:29,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139609707] [2024-06-14 12:04:29,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:29,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:30,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:30,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139609707] [2024-06-14 12:04:30,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139609707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:30,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:30,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:04:30,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557086388] [2024-06-14 12:04:30,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:30,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:04:30,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:30,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:04:30,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:04:30,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:04:30,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:30,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:30,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:04:30,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:31,745 INFO L124 PetriNetUnfolderBase]: 7083/9867 cut-off events. [2024-06-14 12:04:31,745 INFO L125 PetriNetUnfolderBase]: For 17210/17232 co-relation queries the response was YES. [2024-06-14 12:04:31,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30676 conditions, 9867 events. 7083/9867 cut-off events. For 17210/17232 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54381 event pairs, 3533 based on Foata normal form. 5/9852 useless extension candidates. Maximal degree in co-relation 30655. Up to 9589 conditions per place. [2024-06-14 12:04:31,805 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-14 12:04:31,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 604 flow [2024-06-14 12:04:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:04:31,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:04:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-14 12:04:31,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-14 12:04:31,810 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 165 transitions. [2024-06-14 12:04:31,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 604 flow [2024-06-14 12:04:31,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 575 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:31,818 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 354 flow [2024-06-14 12:04:31,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-14 12:04:31,821 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-14 12:04:31,821 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 354 flow [2024-06-14 12:04:31,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:31,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:31,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:31,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:04:31,822 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)] === [2024-06-14 12:04:31,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:31,822 INFO L85 PathProgramCache]: Analyzing trace with hash 105209235, now seen corresponding path program 2 times [2024-06-14 12:04:31,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:31,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467483481] [2024-06-14 12:04:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:31,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:31,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:32,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:32,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467483481] [2024-06-14 12:04:32,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467483481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:32,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:32,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:04:32,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233997478] [2024-06-14 12:04:32,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:32,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:04:32,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:32,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:04:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:04:32,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:04:32,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 354 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:32,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:32,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:04:32,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:33,854 INFO L124 PetriNetUnfolderBase]: 7074/9870 cut-off events. [2024-06-14 12:04:33,855 INFO L125 PetriNetUnfolderBase]: For 25231/25272 co-relation queries the response was YES. [2024-06-14 12:04:33,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33350 conditions, 9870 events. 7074/9870 cut-off events. For 25231/25272 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54356 event pairs, 3536 based on Foata normal form. 25/9877 useless extension candidates. Maximal degree in co-relation 33328. Up to 9580 conditions per place. [2024-06-14 12:04:33,906 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 64 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-14 12:04:33,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 586 flow [2024-06-14 12:04:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:04:33,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:04:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 12:04:33,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:04:33,908 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 354 flow. Second operand 6 states and 159 transitions. [2024-06-14 12:04:33,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 586 flow [2024-06-14 12:04:33,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 540 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 12:04:33,919 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 361 flow [2024-06-14 12:04:33,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-14 12:04:33,919 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 12:04:33,919 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 361 flow [2024-06-14 12:04:33,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:33,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:33,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:33,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:04:33,920 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)] === [2024-06-14 12:04:33,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:33,921 INFO L85 PathProgramCache]: Analyzing trace with hash -398159325, now seen corresponding path program 1 times [2024-06-14 12:04:33,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:33,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200157234] [2024-06-14 12:04:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:33,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:34,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:34,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200157234] [2024-06-14 12:04:34,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200157234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:34,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:34,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408009304] [2024-06-14 12:04:34,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:34,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:34,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:34,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:04:34,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:34,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:34,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:04:34,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:36,129 INFO L124 PetriNetUnfolderBase]: 7165/10024 cut-off events. [2024-06-14 12:04:36,129 INFO L125 PetriNetUnfolderBase]: For 28963/29001 co-relation queries the response was YES. [2024-06-14 12:04:36,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34240 conditions, 10024 events. 7165/10024 cut-off events. For 28963/29001 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55342 event pairs, 3526 based on Foata normal form. 7/10014 useless extension candidates. Maximal degree in co-relation 34216. Up to 9682 conditions per place. [2024-06-14 12:04:36,176 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 88 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2024-06-14 12:04:36,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 822 flow [2024-06-14 12:04:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:36,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 12:04:36,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-14 12:04:36,178 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 361 flow. Second operand 8 states and 214 transitions. [2024-06-14 12:04:36,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 822 flow [2024-06-14 12:04:36,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 128 transitions, 748 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:36,191 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 513 flow [2024-06-14 12:04:36,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2024-06-14 12:04:36,192 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-14 12:04:36,192 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 513 flow [2024-06-14 12:04:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:36,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:36,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:36,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:04:36,193 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)] === [2024-06-14 12:04:36,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:36,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1781527013, now seen corresponding path program 2 times [2024-06-14 12:04:36,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:36,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191438926] [2024-06-14 12:04:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:36,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:37,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:37,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191438926] [2024-06-14 12:04:37,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191438926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:37,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:37,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:37,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292950223] [2024-06-14 12:04:37,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:37,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:37,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:37,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:37,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:37,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:04:37,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 513 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:37,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:37,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:04:37,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:38,654 INFO L124 PetriNetUnfolderBase]: 7187/10057 cut-off events. [2024-06-14 12:04:38,655 INFO L125 PetriNetUnfolderBase]: For 39639/39703 co-relation queries the response was YES. [2024-06-14 12:04:38,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37266 conditions, 10057 events. 7187/10057 cut-off events. For 39639/39703 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55292 event pairs, 3508 based on Foata normal form. 11/10049 useless extension candidates. Maximal degree in co-relation 37240. Up to 9689 conditions per place. [2024-06-14 12:04:38,718 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 88 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2024-06-14 12:04:38,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 927 flow [2024-06-14 12:04:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 12:04:38,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-14 12:04:38,720 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 513 flow. Second operand 7 states and 188 transitions. [2024-06-14 12:04:38,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 927 flow [2024-06-14 12:04:38,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 130 transitions, 869 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:38,738 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 590 flow [2024-06-14 12:04:38,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2024-06-14 12:04:38,739 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-14 12:04:38,739 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 590 flow [2024-06-14 12:04:38,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:38,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:38,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:38,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:04:38,740 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)] === [2024-06-14 12:04:38,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:38,740 INFO L85 PathProgramCache]: Analyzing trace with hash -111260277, now seen corresponding path program 3 times [2024-06-14 12:04:38,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:38,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783219949] [2024-06-14 12:04:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:38,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:39,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:39,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783219949] [2024-06-14 12:04:39,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783219949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:39,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:39,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:39,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110135190] [2024-06-14 12:04:39,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:39,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:39,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:39,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:39,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:39,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:04:39,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:39,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:39,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:04:39,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:41,045 INFO L124 PetriNetUnfolderBase]: 7209/10084 cut-off events. [2024-06-14 12:04:41,045 INFO L125 PetriNetUnfolderBase]: For 51736/51794 co-relation queries the response was YES. [2024-06-14 12:04:41,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40141 conditions, 10084 events. 7209/10084 cut-off events. For 51736/51794 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55516 event pairs, 3397 based on Foata normal form. 21/10087 useless extension candidates. Maximal degree in co-relation 40114. Up to 9633 conditions per place. [2024-06-14 12:04:41,107 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 78 selfloop transitions, 50 changer transitions 0/136 dead transitions. [2024-06-14 12:04:41,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 1104 flow [2024-06-14 12:04:41,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-14 12:04:41,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-14 12:04:41,109 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 590 flow. Second operand 7 states and 192 transitions. [2024-06-14 12:04:41,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 1104 flow [2024-06-14 12:04:41,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 985 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:41,133 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 696 flow [2024-06-14 12:04:41,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-14 12:04:41,134 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-14 12:04:41,134 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 696 flow [2024-06-14 12:04:41,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:41,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:41,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:41,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:04:41,135 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)] === [2024-06-14 12:04:41,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1050460637, now seen corresponding path program 4 times [2024-06-14 12:04:41,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:41,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307741862] [2024-06-14 12:04:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:41,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:41,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:41,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:41,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307741862] [2024-06-14 12:04:41,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307741862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:41,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:41,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:41,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665638374] [2024-06-14 12:04:41,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:41,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:41,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:41,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:41,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:42,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:04:42,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 696 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:42,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:42,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:04:42,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:43,355 INFO L124 PetriNetUnfolderBase]: 7200/10085 cut-off events. [2024-06-14 12:04:43,355 INFO L125 PetriNetUnfolderBase]: For 52599/52657 co-relation queries the response was YES. [2024-06-14 12:04:43,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40086 conditions, 10085 events. 7200/10085 cut-off events. For 52599/52657 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55615 event pairs, 3404 based on Foata normal form. 19/10083 useless extension candidates. Maximal degree in co-relation 40058. Up to 9624 conditions per place. [2024-06-14 12:04:43,419 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 50 changer transitions 0/131 dead transitions. [2024-06-14 12:04:43,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 1040 flow [2024-06-14 12:04:43,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 12:04:43,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-14 12:04:43,420 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 696 flow. Second operand 7 states and 186 transitions. [2024-06-14 12:04:43,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 1040 flow [2024-06-14 12:04:43,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 957 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:43,447 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 724 flow [2024-06-14 12:04:43,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-14 12:04:43,448 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-14 12:04:43,448 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 724 flow [2024-06-14 12:04:43,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:43,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:43,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:43,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:04:43,449 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)] === [2024-06-14 12:04:43,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:43,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1767587523, now seen corresponding path program 1 times [2024-06-14 12:04:43,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:43,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717282005] [2024-06-14 12:04:43,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:43,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:44,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:44,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:44,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717282005] [2024-06-14 12:04:44,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717282005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:44,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:44,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:04:44,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805373367] [2024-06-14 12:04:44,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:44,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:04:44,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:44,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:04:44,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:04:44,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:04:44,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 724 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:44,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:44,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:04:44,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:45,827 INFO L124 PetriNetUnfolderBase]: 8032/11430 cut-off events. [2024-06-14 12:04:45,827 INFO L125 PetriNetUnfolderBase]: For 61254/61256 co-relation queries the response was YES. [2024-06-14 12:04:45,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44908 conditions, 11430 events. 8032/11430 cut-off events. For 61254/61256 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 63861 event pairs, 3736 based on Foata normal form. 6/11345 useless extension candidates. Maximal degree in co-relation 44878. Up to 10879 conditions per place. [2024-06-14 12:04:45,897 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 114 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-14 12:04:45,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1151 flow [2024-06-14 12:04:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:04:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:04:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 12:04:45,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-14 12:04:45,898 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 724 flow. Second operand 7 states and 182 transitions. [2024-06-14 12:04:45,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1151 flow [2024-06-14 12:04:45,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1010 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:04:45,929 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 705 flow [2024-06-14 12:04:45,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=705, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-14 12:04:45,930 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-14 12:04:45,930 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 705 flow [2024-06-14 12:04:45,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:45,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:45,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:45,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:04:45,931 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:04:45,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:45,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1689451299, now seen corresponding path program 1 times [2024-06-14 12:04:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:45,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629737159] [2024-06-14 12:04:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:45,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:46,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:46,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629737159] [2024-06-14 12:04:46,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629737159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:46,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:46,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:04:46,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579125567] [2024-06-14 12:04:46,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:46,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:04:46,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:46,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:04:46,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:04:46,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:04:46,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 705 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:46,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:46,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:04:46,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:47,929 INFO L124 PetriNetUnfolderBase]: 7529/11016 cut-off events. [2024-06-14 12:04:47,929 INFO L125 PetriNetUnfolderBase]: For 72636/72656 co-relation queries the response was YES. [2024-06-14 12:04:47,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45673 conditions, 11016 events. 7529/11016 cut-off events. For 72636/72656 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 63973 event pairs, 3781 based on Foata normal form. 22/10996 useless extension candidates. Maximal degree in co-relation 45641. Up to 10255 conditions per place. [2024-06-14 12:04:48,004 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 103 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2024-06-14 12:04:48,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 1013 flow [2024-06-14 12:04:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:04:48,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:04:48,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-14 12:04:48,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-14 12:04:48,009 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 705 flow. Second operand 5 states and 133 transitions. [2024-06-14 12:04:48,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 1013 flow [2024-06-14 12:04:48,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 953 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:04:48,051 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 718 flow [2024-06-14 12:04:48,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2024-06-14 12:04:48,052 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-14 12:04:48,052 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 718 flow [2024-06-14 12:04:48,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:48,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:48,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:48,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:04:48,053 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:04:48,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1530852962, now seen corresponding path program 1 times [2024-06-14 12:04:48,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:48,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552187901] [2024-06-14 12:04:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:48,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:49,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:49,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552187901] [2024-06-14 12:04:49,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552187901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:49,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:49,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:49,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595664466] [2024-06-14 12:04:49,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:49,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:49,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:49,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:49,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:49,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:04:49,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 718 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:49,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:49,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:04:49,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:50,979 INFO L124 PetriNetUnfolderBase]: 9141/12788 cut-off events. [2024-06-14 12:04:50,979 INFO L125 PetriNetUnfolderBase]: For 109817/109889 co-relation queries the response was YES. [2024-06-14 12:04:51,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58441 conditions, 12788 events. 9141/12788 cut-off events. For 109817/109889 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 71802 event pairs, 3609 based on Foata normal form. 42/12829 useless extension candidates. Maximal degree in co-relation 58408. Up to 11961 conditions per place. [2024-06-14 12:04:51,054 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 127 selfloop transitions, 41 changer transitions 0/177 dead transitions. [2024-06-14 12:04:51,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 177 transitions, 1408 flow [2024-06-14 12:04:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:04:51,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:04:51,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-14 12:04:51,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136268343815513 [2024-06-14 12:04:51,056 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 718 flow. Second operand 9 states and 245 transitions. [2024-06-14 12:04:51,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 177 transitions, 1408 flow [2024-06-14 12:04:51,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 177 transitions, 1365 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 12:04:51,088 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 846 flow [2024-06-14 12:04:51,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=846, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-14 12:04:51,088 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-14 12:04:51,089 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 846 flow [2024-06-14 12:04:51,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:51,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:51,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:51,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:04:51,089 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)] === [2024-06-14 12:04:51,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1533709922, now seen corresponding path program 2 times [2024-06-14 12:04:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:51,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390661758] [2024-06-14 12:04:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:51,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:52,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:52,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390661758] [2024-06-14 12:04:52,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390661758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:52,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:52,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:52,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90050228] [2024-06-14 12:04:52,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:52,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:52,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:52,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:52,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:52,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:04:52,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 846 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:52,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:52,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:04:52,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:53,937 INFO L124 PetriNetUnfolderBase]: 9087/12710 cut-off events. [2024-06-14 12:04:53,937 INFO L125 PetriNetUnfolderBase]: For 125435/125499 co-relation queries the response was YES. [2024-06-14 12:04:53,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59832 conditions, 12710 events. 9087/12710 cut-off events. For 125435/125499 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 71367 event pairs, 4109 based on Foata normal form. 48/12757 useless extension candidates. Maximal degree in co-relation 59798. Up to 12111 conditions per place. [2024-06-14 12:04:54,024 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 119 selfloop transitions, 36 changer transitions 0/164 dead transitions. [2024-06-14 12:04:54,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 164 transitions, 1328 flow [2024-06-14 12:04:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 12:04:54,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-14 12:04:54,026 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 846 flow. Second operand 8 states and 215 transitions. [2024-06-14 12:04:54,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 164 transitions, 1328 flow [2024-06-14 12:04:54,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 164 transitions, 1259 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:04:54,077 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 861 flow [2024-06-14 12:04:54,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=97, PETRI_TRANSITIONS=115} [2024-06-14 12:04:54,077 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-14 12:04:54,077 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 861 flow [2024-06-14 12:04:54,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:54,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:54,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:54,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:04:54,078 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)] === [2024-06-14 12:04:54,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:54,078 INFO L85 PathProgramCache]: Analyzing trace with hash 544083054, now seen corresponding path program 3 times [2024-06-14 12:04:54,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:54,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603048895] [2024-06-14 12:04:54,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:54,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:55,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:55,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:55,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603048895] [2024-06-14 12:04:55,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603048895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:55,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:55,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:55,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403399719] [2024-06-14 12:04:55,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:55,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:55,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:55,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:55,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:55,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:04:55,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 115 transitions, 861 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:55,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:55,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:04:55,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:04:56,942 INFO L124 PetriNetUnfolderBase]: 9215/12903 cut-off events. [2024-06-14 12:04:56,942 INFO L125 PetriNetUnfolderBase]: For 139372/139430 co-relation queries the response was YES. [2024-06-14 12:04:56,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61806 conditions, 12903 events. 9215/12903 cut-off events. For 139372/139430 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 72784 event pairs, 4159 based on Foata normal form. 56/12953 useless extension candidates. Maximal degree in co-relation 61770. Up to 12228 conditions per place. [2024-06-14 12:04:57,041 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 97 selfloop transitions, 55 changer transitions 0/161 dead transitions. [2024-06-14 12:04:57,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 161 transitions, 1355 flow [2024-06-14 12:04:57,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:04:57,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:04:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-14 12:04:57,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-14 12:04:57,043 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 861 flow. Second operand 8 states and 216 transitions. [2024-06-14 12:04:57,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 161 transitions, 1355 flow [2024-06-14 12:04:57,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 161 transitions, 1273 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:04:57,110 INFO L231 Difference]: Finished difference. Result has 98 places, 117 transitions, 945 flow [2024-06-14 12:04:57,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=945, PETRI_PLACES=98, PETRI_TRANSITIONS=117} [2024-06-14 12:04:57,110 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-14 12:04:57,110 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 117 transitions, 945 flow [2024-06-14 12:04:57,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:57,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:04:57,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:04:57,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:04:57,111 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)] === [2024-06-14 12:04:57,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:04:57,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1649185790, now seen corresponding path program 1 times [2024-06-14 12:04:57,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:04:57,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657840941] [2024-06-14 12:04:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:04:57,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:04:57,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:04:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:04:58,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:04:58,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657840941] [2024-06-14 12:04:58,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657840941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:04:58,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:04:58,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:04:58,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956644425] [2024-06-14 12:04:58,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:04:58,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:04:58,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:04:58,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:04:58,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:04:58,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:04:58,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 117 transitions, 945 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:04:58,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:04:58,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:04:58,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:00,040 INFO L124 PetriNetUnfolderBase]: 9660/13497 cut-off events. [2024-06-14 12:05:00,041 INFO L125 PetriNetUnfolderBase]: For 157419/157427 co-relation queries the response was YES. [2024-06-14 12:05:00,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64901 conditions, 13497 events. 9660/13497 cut-off events. For 157419/157427 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 74151 event pairs, 4176 based on Foata normal form. 14/13507 useless extension candidates. Maximal degree in co-relation 64864. Up to 13013 conditions per place. [2024-06-14 12:05:00,120 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 127 selfloop transitions, 35 changer transitions 0/169 dead transitions. [2024-06-14 12:05:00,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 169 transitions, 1498 flow [2024-06-14 12:05:00,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:00,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:00,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 12:05:00,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-14 12:05:00,121 INFO L175 Difference]: Start difference. First operand has 98 places, 117 transitions, 945 flow. Second operand 8 states and 207 transitions. [2024-06-14 12:05:00,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 169 transitions, 1498 flow [2024-06-14 12:05:00,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 169 transitions, 1368 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:00,188 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 988 flow [2024-06-14 12:05:00,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=988, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2024-06-14 12:05:00,188 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-14 12:05:00,188 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 988 flow [2024-06-14 12:05:00,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:00,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:00,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:00,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:05:00,189 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:00,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:00,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1615012626, now seen corresponding path program 1 times [2024-06-14 12:05:00,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:00,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673213383] [2024-06-14 12:05:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:00,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:00,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:00,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673213383] [2024-06-14 12:05:00,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673213383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:00,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:00,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:05:00,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197164947] [2024-06-14 12:05:00,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:00,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:05:00,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:00,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:05:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:05:01,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:01,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 988 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:01,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:01,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:01,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:02,614 INFO L124 PetriNetUnfolderBase]: 9167/12999 cut-off events. [2024-06-14 12:05:02,614 INFO L125 PetriNetUnfolderBase]: For 176717/176734 co-relation queries the response was YES. [2024-06-14 12:05:02,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65576 conditions, 12999 events. 9167/12999 cut-off events. For 176717/176734 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 73475 event pairs, 4079 based on Foata normal form. 23/12997 useless extension candidates. Maximal degree in co-relation 65537. Up to 12327 conditions per place. [2024-06-14 12:05:02,710 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 111 selfloop transitions, 35 changer transitions 0/160 dead transitions. [2024-06-14 12:05:02,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1518 flow [2024-06-14 12:05:02,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:05:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:05:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 12:05:02,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-14 12:05:02,712 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 988 flow. Second operand 6 states and 163 transitions. [2024-06-14 12:05:02,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1518 flow [2024-06-14 12:05:02,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 160 transitions, 1408 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:02,786 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1065 flow [2024-06-14 12:05:02,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1065, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-14 12:05:02,786 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-14 12:05:02,786 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1065 flow [2024-06-14 12:05:02,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:02,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:02,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:02,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:05:02,787 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)] === [2024-06-14 12:05:02,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash -938453290, now seen corresponding path program 4 times [2024-06-14 12:05:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:02,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137645868] [2024-06-14 12:05:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:02,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:03,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:03,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137645868] [2024-06-14 12:05:03,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137645868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:03,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:03,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:03,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407592359] [2024-06-14 12:05:03,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:03,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:03,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:03,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:03,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:03,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:03,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1065 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:03,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:03,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:03,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:05,828 INFO L124 PetriNetUnfolderBase]: 9296/13125 cut-off events. [2024-06-14 12:05:05,828 INFO L125 PetriNetUnfolderBase]: For 203354/203412 co-relation queries the response was YES. [2024-06-14 12:05:05,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69694 conditions, 13125 events. 9296/13125 cut-off events. For 203354/203412 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 74591 event pairs, 4094 based on Foata normal form. 72/13190 useless extension candidates. Maximal degree in co-relation 69654. Up to 12372 conditions per place. [2024-06-14 12:05:05,936 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 109 selfloop transitions, 57 changer transitions 0/176 dead transitions. [2024-06-14 12:05:05,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 176 transitions, 1593 flow [2024-06-14 12:05:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 12:05:05,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-14 12:05:05,938 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1065 flow. Second operand 8 states and 213 transitions. [2024-06-14 12:05:05,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 176 transitions, 1593 flow [2024-06-14 12:05:06,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 176 transitions, 1547 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 12:05:06,038 INFO L231 Difference]: Finished difference. Result has 108 places, 134 transitions, 1199 flow [2024-06-14 12:05:06,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1199, PETRI_PLACES=108, PETRI_TRANSITIONS=134} [2024-06-14 12:05:06,039 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-14 12:05:06,039 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 134 transitions, 1199 flow [2024-06-14 12:05:06,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:06,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:06,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:06,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:05:06,039 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:06,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:06,040 INFO L85 PathProgramCache]: Analyzing trace with hash -938268592, now seen corresponding path program 2 times [2024-06-14 12:05:06,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:06,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014382838] [2024-06-14 12:05:06,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:06,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:07,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:07,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014382838] [2024-06-14 12:05:07,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014382838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:07,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:07,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:07,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19075797] [2024-06-14 12:05:07,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:07,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:07,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:07,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:07,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:07,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:07,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 134 transitions, 1199 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:07,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:07,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:07,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:08,860 INFO L124 PetriNetUnfolderBase]: 9844/13772 cut-off events. [2024-06-14 12:05:08,860 INFO L125 PetriNetUnfolderBase]: For 228342/228359 co-relation queries the response was YES. [2024-06-14 12:05:08,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74057 conditions, 13772 events. 9844/13772 cut-off events. For 228342/228359 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 75580 event pairs, 4180 based on Foata normal form. 20/13789 useless extension candidates. Maximal degree in co-relation 74015. Up to 13270 conditions per place. [2024-06-14 12:05:08,962 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 138 selfloop transitions, 39 changer transitions 0/184 dead transitions. [2024-06-14 12:05:08,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 184 transitions, 1794 flow [2024-06-14 12:05:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:08,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 12:05:08,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-14 12:05:08,964 INFO L175 Difference]: Start difference. First operand has 108 places, 134 transitions, 1199 flow. Second operand 8 states and 204 transitions. [2024-06-14 12:05:08,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 184 transitions, 1794 flow [2024-06-14 12:05:09,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 184 transitions, 1650 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:09,099 INFO L231 Difference]: Finished difference. Result has 111 places, 142 transitions, 1259 flow [2024-06-14 12:05:09,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1259, PETRI_PLACES=111, PETRI_TRANSITIONS=142} [2024-06-14 12:05:09,100 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-14 12:05:09,100 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 142 transitions, 1259 flow [2024-06-14 12:05:09,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:09,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:09,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:09,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:05:09,100 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)] === [2024-06-14 12:05:09,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:09,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2146906588, now seen corresponding path program 3 times [2024-06-14 12:05:09,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:09,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744847519] [2024-06-14 12:05:09,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:09,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:10,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:10,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744847519] [2024-06-14 12:05:10,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744847519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:10,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:10,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:10,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093475690] [2024-06-14 12:05:10,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:10,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:10,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:10,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:10,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:10,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:10,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 142 transitions, 1259 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:10,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:10,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:10,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:11,915 INFO L124 PetriNetUnfolderBase]: 9880/13824 cut-off events. [2024-06-14 12:05:11,915 INFO L125 PetriNetUnfolderBase]: For 253297/253314 co-relation queries the response was YES. [2024-06-14 12:05:11,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76941 conditions, 13824 events. 9880/13824 cut-off events. For 253297/253314 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 75882 event pairs, 4188 based on Foata normal form. 20/13841 useless extension candidates. Maximal degree in co-relation 76897. Up to 13322 conditions per place. [2024-06-14 12:05:12,020 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 140 selfloop transitions, 43 changer transitions 0/190 dead transitions. [2024-06-14 12:05:12,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 190 transitions, 1861 flow [2024-06-14 12:05:12,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 12:05:12,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-14 12:05:12,022 INFO L175 Difference]: Start difference. First operand has 111 places, 142 transitions, 1259 flow. Second operand 8 states and 203 transitions. [2024-06-14 12:05:12,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 190 transitions, 1861 flow [2024-06-14 12:05:12,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 190 transitions, 1723 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:12,157 INFO L231 Difference]: Finished difference. Result has 114 places, 148 transitions, 1319 flow [2024-06-14 12:05:12,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1319, PETRI_PLACES=114, PETRI_TRANSITIONS=148} [2024-06-14 12:05:12,158 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-14 12:05:12,158 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 148 transitions, 1319 flow [2024-06-14 12:05:12,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:12,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:12,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:12,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:05:12,158 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)] === [2024-06-14 12:05:12,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash -2139489828, now seen corresponding path program 4 times [2024-06-14 12:05:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:12,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411779639] [2024-06-14 12:05:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:12,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:13,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:13,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411779639] [2024-06-14 12:05:13,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411779639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:13,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:13,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:13,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946676610] [2024-06-14 12:05:13,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:13,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:13,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:13,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:13,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:13,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:13,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 148 transitions, 1319 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:13,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:13,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:13,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:14,880 INFO L124 PetriNetUnfolderBase]: 9865/13787 cut-off events. [2024-06-14 12:05:14,880 INFO L125 PetriNetUnfolderBase]: For 279059/279076 co-relation queries the response was YES. [2024-06-14 12:05:14,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78896 conditions, 13787 events. 9865/13787 cut-off events. For 279059/279076 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 75413 event pairs, 3892 based on Foata normal form. 20/13804 useless extension candidates. Maximal degree in co-relation 78851. Up to 13173 conditions per place. [2024-06-14 12:05:14,987 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 133 selfloop transitions, 54 changer transitions 0/194 dead transitions. [2024-06-14 12:05:14,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 194 transitions, 1909 flow [2024-06-14 12:05:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:14,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 12:05:14,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-14 12:05:14,990 INFO L175 Difference]: Start difference. First operand has 114 places, 148 transitions, 1319 flow. Second operand 8 states and 204 transitions. [2024-06-14 12:05:14,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 194 transitions, 1909 flow [2024-06-14 12:05:15,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 194 transitions, 1784 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:05:15,149 INFO L231 Difference]: Finished difference. Result has 118 places, 151 transitions, 1392 flow [2024-06-14 12:05:15,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=118, PETRI_TRANSITIONS=151} [2024-06-14 12:05:15,149 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-14 12:05:15,149 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 151 transitions, 1392 flow [2024-06-14 12:05:15,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:15,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:15,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:15,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:05:15,150 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:15,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:15,150 INFO L85 PathProgramCache]: Analyzing trace with hash 65091586, now seen corresponding path program 2 times [2024-06-14 12:05:15,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:15,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077855404] [2024-06-14 12:05:15,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:15,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:15,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:15,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077855404] [2024-06-14 12:05:15,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077855404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:15,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:15,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:05:15,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230701300] [2024-06-14 12:05:15,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:15,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:05:15,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:15,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:05:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:05:16,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:16,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 151 transitions, 1392 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:16,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:16,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:16,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:17,558 INFO L124 PetriNetUnfolderBase]: 9286/13169 cut-off events. [2024-06-14 12:05:17,559 INFO L125 PetriNetUnfolderBase]: For 301798/301813 co-relation queries the response was YES. [2024-06-14 12:05:17,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77169 conditions, 13169 events. 9286/13169 cut-off events. For 301798/301813 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 74318 event pairs, 4089 based on Foata normal form. 21/13156 useless extension candidates. Maximal degree in co-relation 77123. Up to 12510 conditions per place. [2024-06-14 12:05:17,705 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 117 selfloop transitions, 35 changer transitions 0/171 dead transitions. [2024-06-14 12:05:17,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1756 flow [2024-06-14 12:05:17,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:05:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:05:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:05:17,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-14 12:05:17,706 INFO L175 Difference]: Start difference. First operand has 118 places, 151 transitions, 1392 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:05:17,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1756 flow [2024-06-14 12:05:18,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 171 transitions, 1560 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:18,009 INFO L231 Difference]: Finished difference. Result has 118 places, 151 transitions, 1275 flow [2024-06-14 12:05:18,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1275, PETRI_PLACES=118, PETRI_TRANSITIONS=151} [2024-06-14 12:05:18,009 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-14 12:05:18,009 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 151 transitions, 1275 flow [2024-06-14 12:05:18,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:18,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:18,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:18,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:05:18,010 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:18,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:18,010 INFO L85 PathProgramCache]: Analyzing trace with hash 59383618, now seen corresponding path program 1 times [2024-06-14 12:05:18,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:18,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287209454] [2024-06-14 12:05:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:18,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:18,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:18,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287209454] [2024-06-14 12:05:18,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287209454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:18,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:18,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:05:18,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928760034] [2024-06-14 12:05:18,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:18,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:05:18,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:18,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:05:18,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:05:18,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:18,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 151 transitions, 1275 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:18,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:18,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:18,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:20,533 INFO L124 PetriNetUnfolderBase]: 8719/12551 cut-off events. [2024-06-14 12:05:20,533 INFO L125 PetriNetUnfolderBase]: For 277197/277199 co-relation queries the response was YES. [2024-06-14 12:05:20,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73020 conditions, 12551 events. 8719/12551 cut-off events. For 277197/277199 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 71488 event pairs, 3537 based on Foata normal form. 4/12468 useless extension candidates. Maximal degree in co-relation 72973. Up to 11874 conditions per place. [2024-06-14 12:05:20,618 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 156 selfloop transitions, 21 changer transitions 0/185 dead transitions. [2024-06-14 12:05:20,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 185 transitions, 1909 flow [2024-06-14 12:05:20,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:05:20,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:05:20,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 12:05:20,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-14 12:05:20,619 INFO L175 Difference]: Start difference. First operand has 118 places, 151 transitions, 1275 flow. Second operand 6 states and 160 transitions. [2024-06-14 12:05:20,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 185 transitions, 1909 flow [2024-06-14 12:05:20,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 185 transitions, 1808 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:20,739 INFO L231 Difference]: Finished difference. Result has 119 places, 159 transitions, 1353 flow [2024-06-14 12:05:20,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1353, PETRI_PLACES=119, PETRI_TRANSITIONS=159} [2024-06-14 12:05:20,739 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-14 12:05:20,739 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 159 transitions, 1353 flow [2024-06-14 12:05:20,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:20,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:20,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:20,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:05:20,740 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:20,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:20,740 INFO L85 PathProgramCache]: Analyzing trace with hash 466382308, now seen corresponding path program 2 times [2024-06-14 12:05:20,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:20,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483792158] [2024-06-14 12:05:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:20,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:21,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:21,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483792158] [2024-06-14 12:05:21,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483792158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:21,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:21,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:05:21,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420742239] [2024-06-14 12:05:21,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:21,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:05:21,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:21,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:05:21,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:05:21,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:21,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 159 transitions, 1353 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:21,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:21,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:21,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:23,237 INFO L124 PetriNetUnfolderBase]: 8705/12535 cut-off events. [2024-06-14 12:05:23,237 INFO L125 PetriNetUnfolderBase]: For 300174/300181 co-relation queries the response was YES. [2024-06-14 12:05:23,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75399 conditions, 12535 events. 8705/12535 cut-off events. For 300174/300181 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 71369 event pairs, 3514 based on Foata normal form. 8/12460 useless extension candidates. Maximal degree in co-relation 75351. Up to 11862 conditions per place. [2024-06-14 12:05:23,331 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 150 selfloop transitions, 21 changer transitions 0/179 dead transitions. [2024-06-14 12:05:23,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 179 transitions, 1755 flow [2024-06-14 12:05:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:05:23,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:05:23,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:05:23,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-14 12:05:23,332 INFO L175 Difference]: Start difference. First operand has 119 places, 159 transitions, 1353 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:05:23,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 179 transitions, 1755 flow [2024-06-14 12:05:23,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 179 transitions, 1649 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-14 12:05:23,517 INFO L231 Difference]: Finished difference. Result has 123 places, 159 transitions, 1298 flow [2024-06-14 12:05:23,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1298, PETRI_PLACES=123, PETRI_TRANSITIONS=159} [2024-06-14 12:05:23,517 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-14 12:05:23,517 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 159 transitions, 1298 flow [2024-06-14 12:05:23,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:23,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:23,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:23,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:05:23,518 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:23,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:23,518 INFO L85 PathProgramCache]: Analyzing trace with hash 949322142, now seen corresponding path program 1 times [2024-06-14 12:05:23,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:23,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588381172] [2024-06-14 12:05:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:23,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:24,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:24,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588381172] [2024-06-14 12:05:24,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588381172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:24,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:24,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:24,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89869340] [2024-06-14 12:05:24,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:24,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:24,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:24,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 159 transitions, 1298 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:24,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:24,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:24,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:26,691 INFO L124 PetriNetUnfolderBase]: 10131/14238 cut-off events. [2024-06-14 12:05:26,691 INFO L125 PetriNetUnfolderBase]: For 379436/379438 co-relation queries the response was YES. [2024-06-14 12:05:26,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86853 conditions, 14238 events. 10131/14238 cut-off events. For 379436/379438 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 78957 event pairs, 4061 based on Foata normal form. 18/14252 useless extension candidates. Maximal degree in co-relation 86803. Up to 13077 conditions per place. [2024-06-14 12:05:26,797 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 144 selfloop transitions, 79 changer transitions 0/230 dead transitions. [2024-06-14 12:05:26,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 230 transitions, 2141 flow [2024-06-14 12:05:26,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-14 12:05:26,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989517819706499 [2024-06-14 12:05:26,799 INFO L175 Difference]: Start difference. First operand has 123 places, 159 transitions, 1298 flow. Second operand 9 states and 238 transitions. [2024-06-14 12:05:26,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 230 transitions, 2141 flow [2024-06-14 12:05:26,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 230 transitions, 2079 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:26,998 INFO L231 Difference]: Finished difference. Result has 128 places, 175 transitions, 1652 flow [2024-06-14 12:05:26,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1652, PETRI_PLACES=128, PETRI_TRANSITIONS=175} [2024-06-14 12:05:26,999 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-14 12:05:26,999 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 175 transitions, 1652 flow [2024-06-14 12:05:26,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:26,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:26,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:26,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:05:26,999 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:27,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:27,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1635842786, now seen corresponding path program 2 times [2024-06-14 12:05:27,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:27,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660879461] [2024-06-14 12:05:27,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:27,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:28,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:28,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660879461] [2024-06-14 12:05:28,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660879461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:28,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:28,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603498817] [2024-06-14 12:05:28,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:28,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:28,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:28,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:28,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:28,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:28,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 175 transitions, 1652 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:28,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:28,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:28,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:30,392 INFO L124 PetriNetUnfolderBase]: 10373/14631 cut-off events. [2024-06-14 12:05:30,392 INFO L125 PetriNetUnfolderBase]: For 422005/422007 co-relation queries the response was YES. [2024-06-14 12:05:30,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92199 conditions, 14631 events. 10373/14631 cut-off events. For 422005/422007 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 81865 event pairs, 4115 based on Foata normal form. 18/14642 useless extension candidates. Maximal degree in co-relation 92147. Up to 13600 conditions per place. [2024-06-14 12:05:30,527 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 146 selfloop transitions, 86 changer transitions 0/239 dead transitions. [2024-06-14 12:05:30,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 239 transitions, 2465 flow [2024-06-14 12:05:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-14 12:05:30,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266247379454925 [2024-06-14 12:05:30,528 INFO L175 Difference]: Start difference. First operand has 128 places, 175 transitions, 1652 flow. Second operand 9 states and 235 transitions. [2024-06-14 12:05:30,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 239 transitions, 2465 flow [2024-06-14 12:05:30,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 239 transitions, 2285 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 12:05:30,811 INFO L231 Difference]: Finished difference. Result has 135 places, 187 transitions, 1869 flow [2024-06-14 12:05:30,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1869, PETRI_PLACES=135, PETRI_TRANSITIONS=187} [2024-06-14 12:05:30,812 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-14 12:05:30,812 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 187 transitions, 1869 flow [2024-06-14 12:05:30,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:30,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:30,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:30,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:05:30,812 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:30,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1990516720, now seen corresponding path program 3 times [2024-06-14 12:05:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:30,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029382400] [2024-06-14 12:05:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:30,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:31,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:31,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029382400] [2024-06-14 12:05:31,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029382400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:31,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:31,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:31,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818622719] [2024-06-14 12:05:31,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:31,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:31,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:31,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:32,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:32,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 187 transitions, 1869 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:32,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:32,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:32,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:34,066 INFO L124 PetriNetUnfolderBase]: 10557/14959 cut-off events. [2024-06-14 12:05:34,066 INFO L125 PetriNetUnfolderBase]: For 458428/458430 co-relation queries the response was YES. [2024-06-14 12:05:34,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95656 conditions, 14959 events. 10557/14959 cut-off events. For 458428/458430 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 84750 event pairs, 3801 based on Foata normal form. 18/14970 useless extension candidates. Maximal degree in co-relation 95601. Up to 12899 conditions per place. [2024-06-14 12:05:34,196 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 135 selfloop transitions, 106 changer transitions 0/248 dead transitions. [2024-06-14 12:05:34,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 248 transitions, 2827 flow [2024-06-14 12:05:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:34,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-14 12:05:34,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-14 12:05:34,198 INFO L175 Difference]: Start difference. First operand has 135 places, 187 transitions, 1869 flow. Second operand 9 states and 237 transitions. [2024-06-14 12:05:34,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 248 transitions, 2827 flow [2024-06-14 12:05:34,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 248 transitions, 2676 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 12:05:34,515 INFO L231 Difference]: Finished difference. Result has 142 places, 193 transitions, 2174 flow [2024-06-14 12:05:34,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2174, PETRI_PLACES=142, PETRI_TRANSITIONS=193} [2024-06-14 12:05:34,515 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-06-14 12:05:34,515 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 193 transitions, 2174 flow [2024-06-14 12:05:34,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:34,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:34,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:34,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:05:34,516 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:34,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash 978445964, now seen corresponding path program 4 times [2024-06-14 12:05:34,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:34,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600001232] [2024-06-14 12:05:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:35,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:35,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600001232] [2024-06-14 12:05:35,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600001232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:35,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:35,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:05:35,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987808664] [2024-06-14 12:05:35,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:35,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:05:35,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:35,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:05:35,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:05:35,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:35,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 193 transitions, 2174 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:35,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:35,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:35,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:37,789 INFO L124 PetriNetUnfolderBase]: 10518/14912 cut-off events. [2024-06-14 12:05:37,789 INFO L125 PetriNetUnfolderBase]: For 481392/481394 co-relation queries the response was YES. [2024-06-14 12:05:37,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96266 conditions, 14912 events. 10518/14912 cut-off events. For 481392/481394 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 84418 event pairs, 4142 based on Foata normal form. 18/14923 useless extension candidates. Maximal degree in co-relation 96209. Up to 13823 conditions per place. [2024-06-14 12:05:37,931 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 153 selfloop transitions, 84 changer transitions 0/244 dead transitions. [2024-06-14 12:05:37,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 244 transitions, 2784 flow [2024-06-14 12:05:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:05:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:05:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-14 12:05:37,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266247379454925 [2024-06-14 12:05:37,932 INFO L175 Difference]: Start difference. First operand has 142 places, 193 transitions, 2174 flow. Second operand 9 states and 235 transitions. [2024-06-14 12:05:37,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 244 transitions, 2784 flow [2024-06-14 12:05:38,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 244 transitions, 2610 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:38,396 INFO L231 Difference]: Finished difference. Result has 145 places, 192 transitions, 2131 flow [2024-06-14 12:05:38,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2131, PETRI_PLACES=145, PETRI_TRANSITIONS=192} [2024-06-14 12:05:38,397 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-06-14 12:05:38,397 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 192 transitions, 2131 flow [2024-06-14 12:05:38,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:38,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:38,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:38,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:05:38,398 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:38,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1840773408, now seen corresponding path program 1 times [2024-06-14 12:05:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:38,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019616990] [2024-06-14 12:05:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:38,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:38,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:39,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:39,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019616990] [2024-06-14 12:05:39,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019616990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:39,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:39,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:39,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436047656] [2024-06-14 12:05:39,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:39,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:39,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:39,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:39,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:39,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:39,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 192 transitions, 2131 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:39,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:39,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:39,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:41,327 INFO L124 PetriNetUnfolderBase]: 9400/13648 cut-off events. [2024-06-14 12:05:41,327 INFO L125 PetriNetUnfolderBase]: For 420243/420245 co-relation queries the response was YES. [2024-06-14 12:05:41,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87389 conditions, 13648 events. 9400/13648 cut-off events. For 420243/420245 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 79910 event pairs, 3568 based on Foata normal form. 4/13614 useless extension candidates. Maximal degree in co-relation 87330. Up to 12935 conditions per place. [2024-06-14 12:05:41,459 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 199 selfloop transitions, 18 changer transitions 0/225 dead transitions. [2024-06-14 12:05:41,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 225 transitions, 2729 flow [2024-06-14 12:05:41,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:41,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 12:05:41,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-14 12:05:41,460 INFO L175 Difference]: Start difference. First operand has 145 places, 192 transitions, 2131 flow. Second operand 7 states and 178 transitions. [2024-06-14 12:05:41,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 225 transitions, 2729 flow [2024-06-14 12:05:41,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 225 transitions, 2451 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 12:05:41,772 INFO L231 Difference]: Finished difference. Result has 144 places, 196 transitions, 1980 flow [2024-06-14 12:05:41,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1980, PETRI_PLACES=144, PETRI_TRANSITIONS=196} [2024-06-14 12:05:41,773 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-06-14 12:05:41,773 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 196 transitions, 1980 flow [2024-06-14 12:05:41,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:41,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:41,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:41,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:05:41,774 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:41,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash -740478740, now seen corresponding path program 2 times [2024-06-14 12:05:41,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:41,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415590965] [2024-06-14 12:05:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:41,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:42,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:42,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415590965] [2024-06-14 12:05:42,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415590965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:42,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:42,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:42,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935438334] [2024-06-14 12:05:42,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:42,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:42,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:42,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:42,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:42,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:42,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 196 transitions, 1980 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:42,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:42,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:42,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:44,782 INFO L124 PetriNetUnfolderBase]: 9432/13690 cut-off events. [2024-06-14 12:05:44,782 INFO L125 PetriNetUnfolderBase]: For 441466/441468 co-relation queries the response was YES. [2024-06-14 12:05:44,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89228 conditions, 13690 events. 9432/13690 cut-off events. For 441466/441468 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 80047 event pairs, 3546 based on Foata normal form. 4/13651 useless extension candidates. Maximal degree in co-relation 89170. Up to 12866 conditions per place. [2024-06-14 12:05:44,908 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 192 selfloop transitions, 35 changer transitions 0/235 dead transitions. [2024-06-14 12:05:44,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 235 transitions, 2800 flow [2024-06-14 12:05:44,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:05:44,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-14 12:05:44,911 INFO L175 Difference]: Start difference. First operand has 144 places, 196 transitions, 1980 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:05:44,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 235 transitions, 2800 flow [2024-06-14 12:05:45,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 235 transitions, 2703 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 12:05:45,208 INFO L231 Difference]: Finished difference. Result has 146 places, 204 transitions, 2134 flow [2024-06-14 12:05:45,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2134, PETRI_PLACES=146, PETRI_TRANSITIONS=204} [2024-06-14 12:05:45,209 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-14 12:05:45,209 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 204 transitions, 2134 flow [2024-06-14 12:05:45,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:45,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:45,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:45,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:05:45,210 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:45,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1572950880, now seen corresponding path program 3 times [2024-06-14 12:05:45,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:45,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259925320] [2024-06-14 12:05:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:45,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:46,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:46,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259925320] [2024-06-14 12:05:46,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259925320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:46,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:46,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:46,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209298618] [2024-06-14 12:05:46,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:46,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:46,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:46,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:46,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:46,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:05:46,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 204 transitions, 2134 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:46,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:46,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:05:46,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:48,229 INFO L124 PetriNetUnfolderBase]: 9418/13671 cut-off events. [2024-06-14 12:05:48,229 INFO L125 PetriNetUnfolderBase]: For 471836/471838 co-relation queries the response was YES. [2024-06-14 12:05:48,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91643 conditions, 13671 events. 9418/13671 cut-off events. For 471836/471838 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 79903 event pairs, 3513 based on Foata normal form. 4/13636 useless extension candidates. Maximal degree in co-relation 91584. Up to 12854 conditions per place. [2024-06-14 12:05:48,356 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 186 selfloop transitions, 35 changer transitions 0/229 dead transitions. [2024-06-14 12:05:48,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 229 transitions, 2650 flow [2024-06-14 12:05:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 12:05:48,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-14 12:05:48,357 INFO L175 Difference]: Start difference. First operand has 146 places, 204 transitions, 2134 flow. Second operand 7 states and 178 transitions. [2024-06-14 12:05:48,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 229 transitions, 2650 flow [2024-06-14 12:05:48,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 229 transitions, 2504 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-14 12:05:48,734 INFO L231 Difference]: Finished difference. Result has 150 places, 204 transitions, 2067 flow [2024-06-14 12:05:48,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2067, PETRI_PLACES=150, PETRI_TRANSITIONS=204} [2024-06-14 12:05:48,734 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-06-14 12:05:48,734 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 204 transitions, 2067 flow [2024-06-14 12:05:48,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:48,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:48,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:48,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:05:48,735 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:48,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:48,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2018271162, now seen corresponding path program 1 times [2024-06-14 12:05:48,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:48,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534919385] [2024-06-14 12:05:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:48,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:48,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:50,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:50,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534919385] [2024-06-14 12:05:50,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534919385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:50,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:50,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:05:50,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779349982] [2024-06-14 12:05:50,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:50,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:05:50,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:50,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:05:50,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:05:50,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-14 12:05:50,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 204 transitions, 2067 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:50,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:50,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-14 12:05:50,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:52,070 INFO L124 PetriNetUnfolderBase]: 8882/13073 cut-off events. [2024-06-14 12:05:52,070 INFO L125 PetriNetUnfolderBase]: For 492031/492048 co-relation queries the response was YES. [2024-06-14 12:05:52,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88669 conditions, 13073 events. 8882/13073 cut-off events. For 492031/492048 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 78296 event pairs, 3472 based on Foata normal form. 19/13006 useless extension candidates. Maximal degree in co-relation 88608. Up to 12151 conditions per place. [2024-06-14 12:05:52,196 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 197 selfloop transitions, 17 changer transitions 0/234 dead transitions. [2024-06-14 12:05:52,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 234 transitions, 2672 flow [2024-06-14 12:05:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:05:52,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:05:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 12:05:52,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-14 12:05:52,198 INFO L175 Difference]: Start difference. First operand has 150 places, 204 transitions, 2067 flow. Second operand 7 states and 177 transitions. [2024-06-14 12:05:52,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 234 transitions, 2672 flow [2024-06-14 12:05:52,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 234 transitions, 2562 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 12:05:52,517 INFO L231 Difference]: Finished difference. Result has 152 places, 211 transitions, 2119 flow [2024-06-14 12:05:52,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2119, PETRI_PLACES=152, PETRI_TRANSITIONS=211} [2024-06-14 12:05:52,518 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-14 12:05:52,518 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 211 transitions, 2119 flow [2024-06-14 12:05:52,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:52,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:52,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:52,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:05:52,519 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:52,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:52,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1199349309, now seen corresponding path program 1 times [2024-06-14 12:05:52,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:52,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103938691] [2024-06-14 12:05:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:52,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:53,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:53,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103938691] [2024-06-14 12:05:53,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103938691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:53,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:53,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:05:53,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461099711] [2024-06-14 12:05:53,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:53,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:05:53,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:53,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:05:53,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:05:53,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-14 12:05:53,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 211 transitions, 2119 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:53,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:53,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-14 12:05:53,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:55,084 INFO L124 PetriNetUnfolderBase]: 8467/12641 cut-off events. [2024-06-14 12:05:55,084 INFO L125 PetriNetUnfolderBase]: For 524512/524589 co-relation queries the response was YES. [2024-06-14 12:05:55,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89683 conditions, 12641 events. 8467/12641 cut-off events. For 524512/524589 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 78220 event pairs, 3263 based on Foata normal form. 16/12460 useless extension candidates. Maximal degree in co-relation 89620. Up to 11541 conditions per place. [2024-06-14 12:05:55,218 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 188 selfloop transitions, 10 changer transitions 0/226 dead transitions. [2024-06-14 12:05:55,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 226 transitions, 2621 flow [2024-06-14 12:05:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:05:55,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:05:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 12:05:55,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433962264150944 [2024-06-14 12:05:55,219 INFO L175 Difference]: Start difference. First operand has 152 places, 211 transitions, 2119 flow. Second operand 5 states and 131 transitions. [2024-06-14 12:05:55,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 226 transitions, 2621 flow [2024-06-14 12:05:55,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 226 transitions, 2523 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:05:55,564 INFO L231 Difference]: Finished difference. Result has 153 places, 215 transitions, 2128 flow [2024-06-14 12:05:55,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2128, PETRI_PLACES=153, PETRI_TRANSITIONS=215} [2024-06-14 12:05:55,564 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-14 12:05:55,565 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 215 transitions, 2128 flow [2024-06-14 12:05:55,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:55,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:55,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:55,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:05:55,565 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:55,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:55,565 INFO L85 PathProgramCache]: Analyzing trace with hash 25575521, now seen corresponding path program 1 times [2024-06-14 12:05:55,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:55,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981579963] [2024-06-14 12:05:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:55,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:55,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:05:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:05:56,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:05:56,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981579963] [2024-06-14 12:05:56,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981579963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:05:56,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:05:56,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:05:56,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105669659] [2024-06-14 12:05:56,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:05:56,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:05:56,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:05:56,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:05:56,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:05:56,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:05:56,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 215 transitions, 2128 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:56,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:05:56,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:05:56,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:05:59,016 INFO L124 PetriNetUnfolderBase]: 10748/15275 cut-off events. [2024-06-14 12:05:59,016 INFO L125 PetriNetUnfolderBase]: For 674542/674569 co-relation queries the response was YES. [2024-06-14 12:05:59,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109751 conditions, 15275 events. 10748/15275 cut-off events. For 674542/674569 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 87680 event pairs, 4952 based on Foata normal form. 21/15285 useless extension candidates. Maximal degree in co-relation 109687. Up to 14411 conditions per place. [2024-06-14 12:05:59,176 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 220 selfloop transitions, 65 changer transitions 0/292 dead transitions. [2024-06-14 12:05:59,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 292 transitions, 3707 flow [2024-06-14 12:05:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:05:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:05:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 12:05:59,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-14 12:05:59,177 INFO L175 Difference]: Start difference. First operand has 153 places, 215 transitions, 2128 flow. Second operand 8 states and 203 transitions. [2024-06-14 12:05:59,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 292 transitions, 3707 flow [2024-06-14 12:05:59,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 292 transitions, 3626 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-14 12:05:59,696 INFO L231 Difference]: Finished difference. Result has 162 places, 250 transitions, 2774 flow [2024-06-14 12:05:59,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2774, PETRI_PLACES=162, PETRI_TRANSITIONS=250} [2024-06-14 12:05:59,696 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-14 12:05:59,696 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 250 transitions, 2774 flow [2024-06-14 12:05:59,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:05:59,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:05:59,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:05:59,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:05:59,697 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:05:59,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:05:59,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1478695205, now seen corresponding path program 2 times [2024-06-14 12:05:59,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:05:59,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765480391] [2024-06-14 12:05:59,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:05:59,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:05:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:00,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:00,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765480391] [2024-06-14 12:06:00,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765480391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:00,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:00,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:00,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146865384] [2024-06-14 12:06:00,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:00,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:00,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:00,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:00,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 250 transitions, 2774 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:00,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:00,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:00,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:03,059 INFO L124 PetriNetUnfolderBase]: 11070/15719 cut-off events. [2024-06-14 12:06:03,059 INFO L125 PetriNetUnfolderBase]: For 735195/735208 co-relation queries the response was YES. [2024-06-14 12:06:03,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117297 conditions, 15719 events. 11070/15719 cut-off events. For 735195/735208 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 90317 event pairs, 4987 based on Foata normal form. 16/15728 useless extension candidates. Maximal degree in co-relation 117228. Up to 14680 conditions per place. [2024-06-14 12:06:03,227 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 228 selfloop transitions, 109 changer transitions 0/344 dead transitions. [2024-06-14 12:06:03,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 344 transitions, 4806 flow [2024-06-14 12:06:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:03,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-14 12:06:03,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117924528301887 [2024-06-14 12:06:03,228 INFO L175 Difference]: Start difference. First operand has 162 places, 250 transitions, 2774 flow. Second operand 8 states and 217 transitions. [2024-06-14 12:06:03,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 344 transitions, 4806 flow [2024-06-14 12:06:03,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 344 transitions, 4502 flow, removed 151 selfloop flow, removed 1 redundant places. [2024-06-14 12:06:03,994 INFO L231 Difference]: Finished difference. Result has 172 places, 296 transitions, 3615 flow [2024-06-14 12:06:03,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3615, PETRI_PLACES=172, PETRI_TRANSITIONS=296} [2024-06-14 12:06:03,995 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-14 12:06:03,995 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 296 transitions, 3615 flow [2024-06-14 12:06:03,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:03,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:03,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:03,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:06:03,996 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:03,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1724892951, now seen corresponding path program 3 times [2024-06-14 12:06:03,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:03,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617740717] [2024-06-14 12:06:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:03,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:04,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:04,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617740717] [2024-06-14 12:06:04,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617740717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:04,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:04,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:04,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797351620] [2024-06-14 12:06:04,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:04,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:04,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:04,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:04,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:04,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:04,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 296 transitions, 3615 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:04,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:04,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:04,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:07,483 INFO L124 PetriNetUnfolderBase]: 11138/15813 cut-off events. [2024-06-14 12:06:07,483 INFO L125 PetriNetUnfolderBase]: For 765056/765078 co-relation queries the response was YES. [2024-06-14 12:06:07,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119739 conditions, 15813 events. 11138/15813 cut-off events. For 765056/765078 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 90824 event pairs, 4951 based on Foata normal form. 25/15831 useless extension candidates. Maximal degree in co-relation 119664. Up to 14740 conditions per place. [2024-06-14 12:06:07,656 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 225 selfloop transitions, 123 changer transitions 0/355 dead transitions. [2024-06-14 12:06:07,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 355 transitions, 5072 flow [2024-06-14 12:06:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-14 12:06:07,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-14 12:06:07,657 INFO L175 Difference]: Start difference. First operand has 172 places, 296 transitions, 3615 flow. Second operand 8 states and 213 transitions. [2024-06-14 12:06:07,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 355 transitions, 5072 flow [2024-06-14 12:06:08,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 355 transitions, 4811 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:08,345 INFO L231 Difference]: Finished difference. Result has 179 places, 313 transitions, 3979 flow [2024-06-14 12:06:08,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3979, PETRI_PLACES=179, PETRI_TRANSITIONS=313} [2024-06-14 12:06:08,346 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2024-06-14 12:06:08,346 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 313 transitions, 3979 flow [2024-06-14 12:06:08,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:08,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:08,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:08,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:06:08,347 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:08,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:08,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1435215829, now seen corresponding path program 4 times [2024-06-14 12:06:08,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:08,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056108690] [2024-06-14 12:06:08,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:08,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:09,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:09,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056108690] [2024-06-14 12:06:09,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056108690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:09,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:09,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:09,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404698431] [2024-06-14 12:06:09,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:09,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:09,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:09,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:09,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:09,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:09,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 313 transitions, 3979 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:09,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:09,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:09,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:12,377 INFO L124 PetriNetUnfolderBase]: 11284/16014 cut-off events. [2024-06-14 12:06:12,378 INFO L125 PetriNetUnfolderBase]: For 809535/809562 co-relation queries the response was YES. [2024-06-14 12:06:12,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123009 conditions, 16014 events. 11284/16014 cut-off events. For 809535/809562 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 91883 event pairs, 5002 based on Foata normal form. 25/16028 useless extension candidates. Maximal degree in co-relation 122931. Up to 14874 conditions per place. [2024-06-14 12:06:12,563 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 219 selfloop transitions, 142 changer transitions 0/368 dead transitions. [2024-06-14 12:06:12,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 368 transitions, 5611 flow [2024-06-14 12:06:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 12:06:12,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2024-06-14 12:06:12,564 INFO L175 Difference]: Start difference. First operand has 179 places, 313 transitions, 3979 flow. Second operand 8 states and 198 transitions. [2024-06-14 12:06:12,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 368 transitions, 5611 flow [2024-06-14 12:06:13,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 368 transitions, 5352 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:13,542 INFO L231 Difference]: Finished difference. Result has 184 places, 334 transitions, 4589 flow [2024-06-14 12:06:13,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4589, PETRI_PLACES=184, PETRI_TRANSITIONS=334} [2024-06-14 12:06:13,543 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 128 predicate places. [2024-06-14 12:06:13,543 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 334 transitions, 4589 flow [2024-06-14 12:06:13,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:13,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:13,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:13,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:06:13,544 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:13,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:13,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2986463, now seen corresponding path program 5 times [2024-06-14 12:06:13,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:13,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469375293] [2024-06-14 12:06:13,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:13,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:14,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:14,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469375293] [2024-06-14 12:06:14,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469375293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:14,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:14,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:14,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756858762] [2024-06-14 12:06:14,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:14,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:14,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:14,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:14,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:14,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:14,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 334 transitions, 4589 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:14,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:14,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:14,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:17,761 INFO L124 PetriNetUnfolderBase]: 11248/15958 cut-off events. [2024-06-14 12:06:17,761 INFO L125 PetriNetUnfolderBase]: For 838788/838803 co-relation queries the response was YES. [2024-06-14 12:06:17,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123323 conditions, 15958 events. 11248/15958 cut-off events. For 838788/838803 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 91431 event pairs, 4950 based on Foata normal form. 22/15967 useless extension candidates. Maximal degree in co-relation 123244. Up to 14843 conditions per place. [2024-06-14 12:06:17,930 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 224 selfloop transitions, 146 changer transitions 0/377 dead transitions. [2024-06-14 12:06:17,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 377 transitions, 5876 flow [2024-06-14 12:06:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:06:17,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-14 12:06:17,932 INFO L175 Difference]: Start difference. First operand has 184 places, 334 transitions, 4589 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:06:17,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 377 transitions, 5876 flow [2024-06-14 12:06:19,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 377 transitions, 5334 flow, removed 186 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:19,347 INFO L231 Difference]: Finished difference. Result has 187 places, 339 transitions, 4460 flow [2024-06-14 12:06:19,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4460, PETRI_PLACES=187, PETRI_TRANSITIONS=339} [2024-06-14 12:06:19,347 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 131 predicate places. [2024-06-14 12:06:19,348 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 339 transitions, 4460 flow [2024-06-14 12:06:19,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:19,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:19,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:19,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:06:19,348 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:19,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:19,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1233113185, now seen corresponding path program 6 times [2024-06-14 12:06:19,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:19,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303238055] [2024-06-14 12:06:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:19,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:20,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:20,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:20,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303238055] [2024-06-14 12:06:20,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303238055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:20,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:20,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:20,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737023837] [2024-06-14 12:06:20,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:20,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:20,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:20,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:20,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:20,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:20,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 339 transitions, 4460 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:20,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:20,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:20,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:23,429 INFO L124 PetriNetUnfolderBase]: 11300/16029 cut-off events. [2024-06-14 12:06:23,429 INFO L125 PetriNetUnfolderBase]: For 866955/866970 co-relation queries the response was YES. [2024-06-14 12:06:23,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124250 conditions, 16029 events. 11300/16029 cut-off events. For 866955/866970 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 91885 event pairs, 4947 based on Foata normal form. 18/16034 useless extension candidates. Maximal degree in co-relation 124170. Up to 14891 conditions per place. [2024-06-14 12:06:23,613 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 213 selfloop transitions, 159 changer transitions 0/379 dead transitions. [2024-06-14 12:06:23,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 379 transitions, 5711 flow [2024-06-14 12:06:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 12:06:23,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2024-06-14 12:06:23,615 INFO L175 Difference]: Start difference. First operand has 187 places, 339 transitions, 4460 flow. Second operand 8 states and 194 transitions. [2024-06-14 12:06:23,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 379 transitions, 5711 flow [2024-06-14 12:06:24,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 379 transitions, 5426 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 12:06:24,514 INFO L231 Difference]: Finished difference. Result has 192 places, 347 transitions, 4734 flow [2024-06-14 12:06:24,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4734, PETRI_PLACES=192, PETRI_TRANSITIONS=347} [2024-06-14 12:06:24,515 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 136 predicate places. [2024-06-14 12:06:24,515 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 347 transitions, 4734 flow [2024-06-14 12:06:24,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:24,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:24,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:24,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:06:24,516 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:24,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:24,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1414389489, now seen corresponding path program 7 times [2024-06-14 12:06:24,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:24,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58530091] [2024-06-14 12:06:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:24,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:25,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:25,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58530091] [2024-06-14 12:06:25,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58530091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:25,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:25,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:06:25,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355135523] [2024-06-14 12:06:25,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:25,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:06:25,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:25,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:06:25,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:06:25,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:25,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 347 transitions, 4734 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:25,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:25,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:25,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:28,356 INFO L124 PetriNetUnfolderBase]: 11270/15997 cut-off events. [2024-06-14 12:06:28,356 INFO L125 PetriNetUnfolderBase]: For 900170/900214 co-relation queries the response was YES. [2024-06-14 12:06:28,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124422 conditions, 15997 events. 11270/15997 cut-off events. For 900170/900214 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 91762 event pairs, 4966 based on Foata normal form. 34/16020 useless extension candidates. Maximal degree in co-relation 124340. Up to 14865 conditions per place. [2024-06-14 12:06:28,697 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 213 selfloop transitions, 154 changer transitions 0/374 dead transitions. [2024-06-14 12:06:28,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 374 transitions, 5729 flow [2024-06-14 12:06:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:06:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:06:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 12:06:28,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-14 12:06:28,713 INFO L175 Difference]: Start difference. First operand has 192 places, 347 transitions, 4734 flow. Second operand 7 states and 175 transitions. [2024-06-14 12:06:28,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 374 transitions, 5729 flow [2024-06-14 12:06:29,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 374 transitions, 5246 flow, removed 128 selfloop flow, removed 5 redundant places. [2024-06-14 12:06:29,667 INFO L231 Difference]: Finished difference. Result has 194 places, 347 transitions, 4577 flow [2024-06-14 12:06:29,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4251, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4577, PETRI_PLACES=194, PETRI_TRANSITIONS=347} [2024-06-14 12:06:29,668 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 138 predicate places. [2024-06-14 12:06:29,668 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 347 transitions, 4577 flow [2024-06-14 12:06:29,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:29,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:29,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:29,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:06:29,669 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:29,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:29,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1865744287, now seen corresponding path program 8 times [2024-06-14 12:06:29,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:29,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883655447] [2024-06-14 12:06:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:29,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:30,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:30,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883655447] [2024-06-14 12:06:30,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883655447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:30,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:30,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:30,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464822696] [2024-06-14 12:06:30,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:30,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:30,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:30,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:30,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:30,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:30,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 347 transitions, 4577 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:30,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:30,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:30,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:33,565 INFO L124 PetriNetUnfolderBase]: 11248/15974 cut-off events. [2024-06-14 12:06:33,565 INFO L125 PetriNetUnfolderBase]: For 924304/924348 co-relation queries the response was YES. [2024-06-14 12:06:33,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124360 conditions, 15974 events. 11248/15974 cut-off events. For 924304/924348 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 91865 event pairs, 4949 based on Foata normal form. 32/15995 useless extension candidates. Maximal degree in co-relation 124278. Up to 14846 conditions per place. [2024-06-14 12:06:33,754 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 207 selfloop transitions, 159 changer transitions 0/373 dead transitions. [2024-06-14 12:06:33,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 373 transitions, 5422 flow [2024-06-14 12:06:33,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:06:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:06:33,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 12:06:33,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-06-14 12:06:33,755 INFO L175 Difference]: Start difference. First operand has 194 places, 347 transitions, 4577 flow. Second operand 8 states and 188 transitions. [2024-06-14 12:06:33,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 373 transitions, 5422 flow [2024-06-14 12:06:34,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 373 transitions, 5002 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:34,762 INFO L231 Difference]: Finished difference. Result has 198 places, 347 transitions, 4488 flow [2024-06-14 12:06:34,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4157, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4488, PETRI_PLACES=198, PETRI_TRANSITIONS=347} [2024-06-14 12:06:34,762 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2024-06-14 12:06:34,763 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 347 transitions, 4488 flow [2024-06-14 12:06:34,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:34,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:34,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:34,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:06:34,763 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:34,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:34,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1450743883, now seen corresponding path program 1 times [2024-06-14 12:06:34,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:34,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852238792] [2024-06-14 12:06:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:34,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:36,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:36,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852238792] [2024-06-14 12:06:36,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852238792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:36,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:36,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:06:36,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581782669] [2024-06-14 12:06:36,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:36,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:06:36,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:36,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:06:36,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:06:36,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-14 12:06:36,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 347 transitions, 4488 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:36,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:36,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-14 12:06:36,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:38,624 INFO L124 PetriNetUnfolderBase]: 8975/13423 cut-off events. [2024-06-14 12:06:38,625 INFO L125 PetriNetUnfolderBase]: For 806314/806559 co-relation queries the response was YES. [2024-06-14 12:06:38,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104736 conditions, 13423 events. 8975/13423 cut-off events. For 806314/806559 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 84425 event pairs, 4443 based on Foata normal form. 48/13280 useless extension candidates. Maximal degree in co-relation 104653. Up to 12063 conditions per place. [2024-06-14 12:06:38,793 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 263 selfloop transitions, 15 changer transitions 0/362 dead transitions. [2024-06-14 12:06:38,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 362 transitions, 5158 flow [2024-06-14 12:06:38,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:06:38,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:06:38,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 12:06:38,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-14 12:06:38,794 INFO L175 Difference]: Start difference. First operand has 198 places, 347 transitions, 4488 flow. Second operand 6 states and 152 transitions. [2024-06-14 12:06:38,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 362 transitions, 5158 flow [2024-06-14 12:06:39,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 362 transitions, 4837 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 12:06:39,595 INFO L231 Difference]: Finished difference. Result has 198 places, 351 transitions, 4290 flow [2024-06-14 12:06:39,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4167, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4290, PETRI_PLACES=198, PETRI_TRANSITIONS=351} [2024-06-14 12:06:39,597 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2024-06-14 12:06:39,597 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 351 transitions, 4290 flow [2024-06-14 12:06:39,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:39,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:39,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:39,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:06:39,598 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:39,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:39,598 INFO L85 PathProgramCache]: Analyzing trace with hash -5892387, now seen corresponding path program 1 times [2024-06-14 12:06:39,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:39,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408516772] [2024-06-14 12:06:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:39,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:39,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:40,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:40,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408516772] [2024-06-14 12:06:40,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408516772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:40,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:40,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:06:40,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897175282] [2024-06-14 12:06:40,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:40,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:06:40,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:40,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:06:40,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:06:40,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:40,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 351 transitions, 4290 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:40,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:40,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:40,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:06:43,764 INFO L124 PetriNetUnfolderBase]: 11626/16500 cut-off events. [2024-06-14 12:06:43,765 INFO L125 PetriNetUnfolderBase]: For 1023146/1023154 co-relation queries the response was YES. [2024-06-14 12:06:43,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131148 conditions, 16500 events. 11626/16500 cut-off events. For 1023146/1023154 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 94769 event pairs, 4955 based on Foata normal form. 24/16520 useless extension candidates. Maximal degree in co-relation 131064. Up to 15326 conditions per place. [2024-06-14 12:06:43,949 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 338 selfloop transitions, 87 changer transitions 0/432 dead transitions. [2024-06-14 12:06:43,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 432 transitions, 5802 flow [2024-06-14 12:06:43,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:06:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:06:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-14 12:06:43,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-14 12:06:43,950 INFO L175 Difference]: Start difference. First operand has 198 places, 351 transitions, 4290 flow. Second operand 9 states and 243 transitions. [2024-06-14 12:06:43,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 432 transitions, 5802 flow [2024-06-14 12:06:44,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 432 transitions, 5707 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 12:06:44,925 INFO L231 Difference]: Finished difference. Result has 205 places, 371 transitions, 4684 flow [2024-06-14 12:06:44,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4684, PETRI_PLACES=205, PETRI_TRANSITIONS=371} [2024-06-14 12:06:44,925 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 149 predicate places. [2024-06-14 12:06:44,926 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 371 transitions, 4684 flow [2024-06-14 12:06:44,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:44,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:06:44,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:06:44,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:06:44,926 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:06:44,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:06:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash -647458057, now seen corresponding path program 2 times [2024-06-14 12:06:44,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:06:44,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062982933] [2024-06-14 12:06:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:06:44,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:06:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:06:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:06:46,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:06:46,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062982933] [2024-06-14 12:06:46,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062982933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:06:46,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:06:46,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:06:46,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190221660] [2024-06-14 12:06:46,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:06:46,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:06:46,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:06:46,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:06:46,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:06:46,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:06:46,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 371 transitions, 4684 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:06:46,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:06:46,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:06:46,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand