./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix043.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/mix043.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix043.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix043.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-76401ed-m [2024-06-20 16:24:02,612 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:24:02,682 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:24:02,694 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:24:02,700 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:24:02,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:24:02,722 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:24:02,722 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:24:02,723 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:24:02,726 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:24:02,726 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:24:02,726 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:24:02,726 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:24:02,727 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:24:02,727 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:24:02,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:24:02,728 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:24:02,728 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:24:02,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:24:02,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:24:02,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:24:02,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:24:02,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:24:02,729 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:24:02,730 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:24:02,730 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:24:02,730 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:24:02,730 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:24:02,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:24:02,731 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:24:02,732 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:24:02,732 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:24:02,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:24:02,732 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:24:02,732 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:24:02,732 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:24:02,733 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:24:02,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:24:02,733 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:24:02,733 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:24:02,733 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:24:02,734 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:24:02,734 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:24:02,734 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:24:02,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:24:02,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:24:02,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:24:02,959 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:24:02,959 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:24:02,960 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix043.opt.yml/witness.yml [2024-06-20 16:24:03,208 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:24:03,209 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:24:03,210 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix043.opt.i [2024-06-20 16:24:04,196 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:24:04,421 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:24:04,430 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix043.opt.i [2024-06-20 16:24:04,456 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c9d0891/beeb3ea35a30449083245b8872e02c04/FLAG0c2eb787e [2024-06-20 16:24:04,465 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3c9d0891/beeb3ea35a30449083245b8872e02c04 [2024-06-20 16:24:04,466 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:24:04,467 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:24:04,469 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:24:04,469 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:24:04,473 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:24:04,473 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:24:03" (1/2) ... [2024-06-20 16:24:04,474 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f11d935 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:04, skipping insertion in model container [2024-06-20 16:24:04,475 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:24:03" (1/2) ... [2024-06-20 16:24:04,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@24965970 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:24:04, skipping insertion in model container [2024-06-20 16:24:04,477 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:24:04" (2/2) ... [2024-06-20 16:24:04,477 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f11d935 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:04, skipping insertion in model container [2024-06-20 16:24:04,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:24:04" (2/2) ... [2024-06-20 16:24:04,478 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:24:04,566 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:24:04,567 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] (((((((((((((((((((((((! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! 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 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 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 || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:24:04,567 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((((! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:24:04,567 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((((! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! 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 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 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 || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:24:04,568 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((((! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-20 16:24:04,568 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:24:04,568 INFO L106 edCorrectnessWitness]: ghost_update [L849-L849] multithreaded = 1; [2024-06-20 16:24:04,600 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:24:04,942 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:24:04,952 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:24:05,061 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:24:05,087 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:24:05,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05 WrapperNode [2024-06-20 16:24:05,088 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:24:05,088 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:24:05,089 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:24:05,089 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:24:05,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,145 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,182 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 165 [2024-06-20 16:24:05,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:24:05,183 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:24:05,183 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:24:05,183 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:24:05,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,196 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,217 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:24:05,217 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,218 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,233 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,245 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,247 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,252 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:24:05,252 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:24:05,252 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:24:05,252 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:24:05,253 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (1/1) ... [2024-06-20 16:24:05,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:24:05,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:24:05,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:24:05,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:24:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:24:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:24:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:24:05,332 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:24:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:24:05,332 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:24:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:24:05,333 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:24:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:24:05,333 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:24:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:24:05,333 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:24:05,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:24:05,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:24:05,335 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:24:05,474 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:24:05,477 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:24:05,855 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:24:05,856 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:24:06,025 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:24:06,025 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:24:06,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:24:06 BoogieIcfgContainer [2024-06-20 16:24:06,026 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:24:06,027 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:24:06,028 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:24:06,030 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:24:06,030 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:24:03" (1/4) ... [2024-06-20 16:24:06,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4db0a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:24:06, skipping insertion in model container [2024-06-20 16:24:06,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:24:04" (2/4) ... [2024-06-20 16:24:06,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4db0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:24:06, skipping insertion in model container [2024-06-20 16:24:06,031 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:24:05" (3/4) ... [2024-06-20 16:24:06,031 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4db0a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:24:06, skipping insertion in model container [2024-06-20 16:24:06,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:24:06" (4/4) ... [2024-06-20 16:24:06,033 INFO L112 eAbstractionObserver]: Analyzing ICFG mix043.opt.i [2024-06-20 16:24:06,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:24:06,046 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:24:06,046 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:24:06,088 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:24:06,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 16:24:06,149 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-20 16:24:06,149 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:24:06,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 87 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:24:06,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-20 16:24:06,155 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-20 16:24:06,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:24:06,187 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;@337a78f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:24:06,197 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:24:06,201 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:24:06,201 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:24:06,201 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:24:06,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:06,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:24:06,202 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)] === [2024-06-20 16:24:06,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash 392448364, now seen corresponding path program 1 times [2024-06-20 16:24:06,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:06,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355179557] [2024-06-20 16:24:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:06,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:07,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:07,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355179557] [2024-06-20 16:24:07,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355179557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:07,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:07,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:24:07,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841952993] [2024-06-20 16:24:07,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:07,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:24:07,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:07,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:24:07,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:24:07,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-20 16:24:07,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:07,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:07,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-20 16:24:07,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:08,571 INFO L124 PetriNetUnfolderBase]: 5891/8475 cut-off events. [2024-06-20 16:24:08,571 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-06-20 16:24:08,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16795 conditions, 8475 events. 5891/8475 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 48970 event pairs, 4304 based on Foata normal form. 1/8210 useless extension candidates. Maximal degree in co-relation 16782. Up to 8069 conditions per place. [2024-06-20 16:24:08,616 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-20 16:24:08,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 227 flow [2024-06-20 16:24:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:24:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:24:08,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-20 16:24:08,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6352201257861635 [2024-06-20 16:24:08,626 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 101 transitions. [2024-06-20 16:24:08,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 227 flow [2024-06-20 16:24:08,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:08,631 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-20 16:24:08,632 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} [2024-06-20 16:24:08,635 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-20 16:24:08,635 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-20 16:24:08,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:08,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:08,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:08,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:24:08,636 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)] === [2024-06-20 16:24:08,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:08,637 INFO L85 PathProgramCache]: Analyzing trace with hash -813815215, now seen corresponding path program 1 times [2024-06-20 16:24:08,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:08,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724171770] [2024-06-20 16:24:08,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:08,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:09,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:09,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724171770] [2024-06-20 16:24:09,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724171770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:09,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:09,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:24:09,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291407091] [2024-06-20 16:24:09,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:09,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:24:09,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:24:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:24:09,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-20 16:24:09,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:09,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:09,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-20 16:24:09,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:10,598 INFO L124 PetriNetUnfolderBase]: 6745/9473 cut-off events. [2024-06-20 16:24:10,599 INFO L125 PetriNetUnfolderBase]: For 1966/1966 co-relation queries the response was YES. [2024-06-20 16:24:10,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21644 conditions, 9473 events. 6745/9473 cut-off events. For 1966/1966 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 53659 event pairs, 4203 based on Foata normal form. 4/9354 useless extension candidates. Maximal degree in co-relation 21632. Up to 9186 conditions per place. [2024-06-20 16:24:10,642 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-20 16:24:10,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-20 16:24:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:24:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:24:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-20 16:24:10,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084905660377359 [2024-06-20 16:24:10,645 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 129 transitions. [2024-06-20 16:24:10,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-20 16:24:10,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:24:10,650 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-20 16:24:10,650 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} [2024-06-20 16:24:10,651 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-20 16:24:10,651 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-20 16:24:10,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:10,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:10,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:10,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:24:10,652 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)] === [2024-06-20 16:24:10,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:10,652 INFO L85 PathProgramCache]: Analyzing trace with hash 723060586, now seen corresponding path program 1 times [2024-06-20 16:24:10,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:10,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031822966] [2024-06-20 16:24:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:10,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:11,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:11,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031822966] [2024-06-20 16:24:11,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031822966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:11,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:11,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:24:11,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617473762] [2024-06-20 16:24:11,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:11,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:24:11,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:11,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:24:11,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:24:11,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-20 16:24:11,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:11,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:11,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-20 16:24:11,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:13,129 INFO L124 PetriNetUnfolderBase]: 8565/11942 cut-off events. [2024-06-20 16:24:13,130 INFO L125 PetriNetUnfolderBase]: For 6727/6727 co-relation queries the response was YES. [2024-06-20 16:24:13,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30301 conditions, 11942 events. 8565/11942 cut-off events. For 6727/6727 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 66579 event pairs, 4084 based on Foata normal form. 8/11794 useless extension candidates. Maximal degree in co-relation 30287. Up to 11551 conditions per place. [2024-06-20 16:24:13,182 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-20 16:24:13,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 486 flow [2024-06-20 16:24:13,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:24:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:24:13,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-20 16:24:13,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-20 16:24:13,188 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 180 transitions. [2024-06-20 16:24:13,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 486 flow [2024-06-20 16:24:13,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 458 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 16:24:13,193 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-20 16:24:13,193 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} [2024-06-20 16:24:13,194 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-20 16:24:13,194 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-20 16:24:13,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:13,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:13,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:13,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:24:13,196 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)] === [2024-06-20 16:24:13,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1268950351, now seen corresponding path program 1 times [2024-06-20 16:24:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:13,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594094207] [2024-06-20 16:24:13,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:13,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:14,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594094207] [2024-06-20 16:24:14,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594094207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:14,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:14,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:24:14,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643588080] [2024-06-20 16:24:14,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:14,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:24:14,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:14,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:24:14,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:24:14,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:24:14,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:14,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:14,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:24:14,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:15,370 INFO L124 PetriNetUnfolderBase]: 7458/10672 cut-off events. [2024-06-20 16:24:15,371 INFO L125 PetriNetUnfolderBase]: For 11172/11172 co-relation queries the response was YES. [2024-06-20 16:24:15,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29690 conditions, 10672 events. 7458/10672 cut-off events. For 11172/11172 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 61316 event pairs, 3877 based on Foata normal form. 3/10502 useless extension candidates. Maximal degree in co-relation 29673. Up to 10150 conditions per place. [2024-06-20 16:24:15,423 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-20 16:24:15,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 447 flow [2024-06-20 16:24:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:24:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:24:15,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 16:24:15,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433962264150944 [2024-06-20 16:24:15,424 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 131 transitions. [2024-06-20 16:24:15,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 447 flow [2024-06-20 16:24:15,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:15,428 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-20 16:24:15,428 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} [2024-06-20 16:24:15,429 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-20 16:24:15,429 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-20 16:24:15,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:15,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:15,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:15,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:24:15,430 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)] === [2024-06-20 16:24:15,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash 431108034, now seen corresponding path program 1 times [2024-06-20 16:24:15,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:15,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792188280] [2024-06-20 16:24:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:15,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:16,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:16,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792188280] [2024-06-20 16:24:16,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792188280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:16,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:16,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:24:16,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915467284] [2024-06-20 16:24:16,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:16,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:24:16,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:16,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:24:16,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:24:16,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:16,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:16,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:16,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:16,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:17,960 INFO L124 PetriNetUnfolderBase]: 8578/11948 cut-off events. [2024-06-20 16:24:17,960 INFO L125 PetriNetUnfolderBase]: For 19663/19685 co-relation queries the response was YES. [2024-06-20 16:24:17,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36571 conditions, 11948 events. 8578/11948 cut-off events. For 19663/19685 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 66386 event pairs, 4353 based on Foata normal form. 5/11800 useless extension candidates. Maximal degree in co-relation 36552. Up to 11584 conditions per place. [2024-06-20 16:24:18,034 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-20 16:24:18,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 604 flow [2024-06-20 16:24:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:24:18,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:24:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-20 16:24:18,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:24:18,036 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 159 transitions. [2024-06-20 16:24:18,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 604 flow [2024-06-20 16:24:18,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 575 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:18,041 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 354 flow [2024-06-20 16:24:18,042 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} [2024-06-20 16:24:18,042 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-20 16:24:18,042 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 354 flow [2024-06-20 16:24:18,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:18,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:18,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:18,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:24:18,043 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)] === [2024-06-20 16:24:18,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:18,044 INFO L85 PathProgramCache]: Analyzing trace with hash 550170016, now seen corresponding path program 2 times [2024-06-20 16:24:18,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:18,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782850513] [2024-06-20 16:24:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:18,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:18,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:18,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:18,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782850513] [2024-06-20 16:24:18,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782850513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:18,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:18,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:24:18,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217657018] [2024-06-20 16:24:18,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:18,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:24:18,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:18,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:24:18,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:24:19,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:19,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 354 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:19,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:19,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:19,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:20,372 INFO L124 PetriNetUnfolderBase]: 8569/11951 cut-off events. [2024-06-20 16:24:20,373 INFO L125 PetriNetUnfolderBase]: For 28915/28956 co-relation queries the response was YES. [2024-06-20 16:24:20,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39690 conditions, 11951 events. 8569/11951 cut-off events. For 28915/28956 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 66595 event pairs, 4356 based on Foata normal form. 25/11825 useless extension candidates. Maximal degree in co-relation 39670. Up to 11575 conditions per place. [2024-06-20 16:24:20,451 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 64 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-20 16:24:20,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 586 flow [2024-06-20 16:24:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:24:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:24:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 16:24:20,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-20 16:24:20,453 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 354 flow. Second operand 6 states and 153 transitions. [2024-06-20 16:24:20,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 586 flow [2024-06-20 16:24:20,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 540 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-20 16:24:20,468 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 361 flow [2024-06-20 16:24:20,468 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} [2024-06-20 16:24:20,468 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-20 16:24:20,469 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 361 flow [2024-06-20 16:24:20,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:20,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:20,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:20,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:24:20,470 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)] === [2024-06-20 16:24:20,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:20,470 INFO L85 PathProgramCache]: Analyzing trace with hash -582831454, now seen corresponding path program 1 times [2024-06-20 16:24:20,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:20,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061787261] [2024-06-20 16:24:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:20,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:21,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:21,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061787261] [2024-06-20 16:24:21,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061787261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:21,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:21,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:21,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163162808] [2024-06-20 16:24:21,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:21,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:21,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:21,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:21,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:21,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:21,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:21,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:21,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:21,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:23,293 INFO L124 PetriNetUnfolderBase]: 8660/12105 cut-off events. [2024-06-20 16:24:23,293 INFO L125 PetriNetUnfolderBase]: For 33335/33373 co-relation queries the response was YES. [2024-06-20 16:24:23,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40640 conditions, 12105 events. 8660/12105 cut-off events. For 33335/33373 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 67503 event pairs, 4346 based on Foata normal form. 7/11962 useless extension candidates. Maximal degree in co-relation 40618. Up to 11677 conditions per place. [2024-06-20 16:24:23,350 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 88 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2024-06-20 16:24:23,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 822 flow [2024-06-20 16:24:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 16:24:23,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-20 16:24:23,352 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 361 flow. Second operand 8 states and 206 transitions. [2024-06-20 16:24:23,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 822 flow [2024-06-20 16:24:23,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 128 transitions, 748 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:23,364 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 513 flow [2024-06-20 16:24:23,365 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} [2024-06-20 16:24:23,365 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-20 16:24:23,365 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 513 flow [2024-06-20 16:24:23,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:23,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:23,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:23,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:24:23,366 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)] === [2024-06-20 16:24:23,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:23,367 INFO L85 PathProgramCache]: Analyzing trace with hash 479328142, now seen corresponding path program 2 times [2024-06-20 16:24:23,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:23,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567897270] [2024-06-20 16:24:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:23,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:24,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:24,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567897270] [2024-06-20 16:24:24,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567897270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:24,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:24,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:24,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946734094] [2024-06-20 16:24:24,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:24,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:24,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:24,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:24,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:24,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 513 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:24,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:24,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:24,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:26,015 INFO L124 PetriNetUnfolderBase]: 8682/12143 cut-off events. [2024-06-20 16:24:26,015 INFO L125 PetriNetUnfolderBase]: For 45247/45311 co-relation queries the response was YES. [2024-06-20 16:24:26,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44136 conditions, 12143 events. 8682/12143 cut-off events. For 45247/45311 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 67808 event pairs, 4266 based on Foata normal form. 11/12007 useless extension candidates. Maximal degree in co-relation 44112. Up to 11684 conditions per place. [2024-06-20 16:24:26,093 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 88 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2024-06-20 16:24:26,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 927 flow [2024-06-20 16:24:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:26,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:26,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 16:24:26,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-20 16:24:26,095 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 513 flow. Second operand 7 states and 181 transitions. [2024-06-20 16:24:26,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 927 flow [2024-06-20 16:24:26,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 130 transitions, 869 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:26,111 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 590 flow [2024-06-20 16:24:26,112 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} [2024-06-20 16:24:26,112 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-20 16:24:26,112 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 590 flow [2024-06-20 16:24:26,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:26,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:26,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:26,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:24:26,113 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)] === [2024-06-20 16:24:26,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:26,113 INFO L85 PathProgramCache]: Analyzing trace with hash -200681706, now seen corresponding path program 3 times [2024-06-20 16:24:26,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:26,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950655264] [2024-06-20 16:24:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:26,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:27,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:27,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950655264] [2024-06-20 16:24:27,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950655264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:27,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:27,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:27,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451350216] [2024-06-20 16:24:27,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:27,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:27,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:27,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:27,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:27,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:27,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:27,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:27,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:27,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:28,683 INFO L124 PetriNetUnfolderBase]: 8704/12166 cut-off events. [2024-06-20 16:24:28,683 INFO L125 PetriNetUnfolderBase]: For 59292/59350 co-relation queries the response was YES. [2024-06-20 16:24:28,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47452 conditions, 12166 events. 8704/12166 cut-off events. For 59292/59350 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 67835 event pairs, 4192 based on Foata normal form. 21/12037 useless extension candidates. Maximal degree in co-relation 47427. Up to 11628 conditions per place. [2024-06-20 16:24:28,765 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 78 selfloop transitions, 50 changer transitions 0/136 dead transitions. [2024-06-20 16:24:28,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 1104 flow [2024-06-20 16:24:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-20 16:24:28,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49865229110512127 [2024-06-20 16:24:28,766 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 590 flow. Second operand 7 states and 185 transitions. [2024-06-20 16:24:28,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 1104 flow [2024-06-20 16:24:28,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 985 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:28,797 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 696 flow [2024-06-20 16:24:28,797 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} [2024-06-20 16:24:28,798 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-20 16:24:28,798 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 696 flow [2024-06-20 16:24:28,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:28,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:28,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:28,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:24:28,799 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)] === [2024-06-20 16:24:28,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:28,799 INFO L85 PathProgramCache]: Analyzing trace with hash -146047262, now seen corresponding path program 4 times [2024-06-20 16:24:28,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:28,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150562996] [2024-06-20 16:24:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:28,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:29,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:29,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150562996] [2024-06-20 16:24:29,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150562996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:29,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:29,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:29,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477941871] [2024-06-20 16:24:29,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:29,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:29,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:29,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:29,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:30,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:30,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 696 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:30,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:30,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:30,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:31,794 INFO L124 PetriNetUnfolderBase]: 8695/12167 cut-off events. [2024-06-20 16:24:31,794 INFO L125 PetriNetUnfolderBase]: For 60413/60471 co-relation queries the response was YES. [2024-06-20 16:24:31,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47397 conditions, 12167 events. 8695/12167 cut-off events. For 60413/60471 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 67925 event pairs, 4199 based on Foata normal form. 19/12033 useless extension candidates. Maximal degree in co-relation 47371. Up to 11619 conditions per place. [2024-06-20 16:24:31,889 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 50 changer transitions 0/131 dead transitions. [2024-06-20 16:24:31,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 1040 flow [2024-06-20 16:24:31,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:31,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 16:24:31,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48247978436657685 [2024-06-20 16:24:31,891 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 696 flow. Second operand 7 states and 179 transitions. [2024-06-20 16:24:31,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 1040 flow [2024-06-20 16:24:31,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 957 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:31,928 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 724 flow [2024-06-20 16:24:31,928 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} [2024-06-20 16:24:31,929 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-20 16:24:31,929 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 724 flow [2024-06-20 16:24:31,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:31,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:31,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:31,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:24:31,930 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)] === [2024-06-20 16:24:31,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:31,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1001107652, now seen corresponding path program 1 times [2024-06-20 16:24:31,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:31,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948650092] [2024-06-20 16:24:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:31,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:33,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:33,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948650092] [2024-06-20 16:24:33,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948650092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:33,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:33,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:33,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923143668] [2024-06-20 16:24:33,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:33,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:33,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:33,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:33,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:33,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 724 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:33,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:33,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:33,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:34,791 INFO L124 PetriNetUnfolderBase]: 9687/13763 cut-off events. [2024-06-20 16:24:34,791 INFO L125 PetriNetUnfolderBase]: For 73341/73343 co-relation queries the response was YES. [2024-06-20 16:24:34,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53050 conditions, 13763 events. 9687/13763 cut-off events. For 73341/73343 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 77740 event pairs, 4608 based on Foata normal form. 6/13568 useless extension candidates. Maximal degree in co-relation 53022. Up to 13084 conditions per place. [2024-06-20 16:24:34,883 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 114 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-20 16:24:34,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1151 flow [2024-06-20 16:24:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:24:34,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:24:34,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 16:24:34,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-20 16:24:34,885 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 724 flow. Second operand 7 states and 175 transitions. [2024-06-20 16:24:34,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1151 flow [2024-06-20 16:24:34,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1010 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:34,921 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 705 flow [2024-06-20 16:24:34,921 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} [2024-06-20 16:24:34,921 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-20 16:24:34,921 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 705 flow [2024-06-20 16:24:34,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:34,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:34,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:34,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:24:34,922 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)] === [2024-06-20 16:24:34,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:34,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1581016307, now seen corresponding path program 1 times [2024-06-20 16:24:34,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:34,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796969554] [2024-06-20 16:24:34,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:34,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:35,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:35,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796969554] [2024-06-20 16:24:35,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796969554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:35,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:35,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:24:35,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73874270] [2024-06-20 16:24:35,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:35,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:24:35,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:24:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:24:35,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:24:35,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 705 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:35,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:35,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:24:35,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:37,477 INFO L124 PetriNetUnfolderBase]: 9069/13218 cut-off events. [2024-06-20 16:24:37,477 INFO L125 PetriNetUnfolderBase]: For 83790/83807 co-relation queries the response was YES. [2024-06-20 16:24:37,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53995 conditions, 13218 events. 9069/13218 cut-off events. For 83790/83807 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 77943 event pairs, 4701 based on Foata normal form. 17/13066 useless extension candidates. Maximal degree in co-relation 53965. Up to 12368 conditions per place. [2024-06-20 16:24:37,562 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 102 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-20 16:24:37,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 1009 flow [2024-06-20 16:24:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:24:37,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:24:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 16:24:37,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-20 16:24:37,563 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 705 flow. Second operand 5 states and 127 transitions. [2024-06-20 16:24:37,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 1009 flow [2024-06-20 16:24:37,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 949 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:37,602 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 718 flow [2024-06-20 16:24:37,602 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} [2024-06-20 16:24:37,604 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-20 16:24:37,605 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 718 flow [2024-06-20 16:24:37,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:37,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:37,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:37,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:24:37,605 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:37,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:37,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1766863193, now seen corresponding path program 1 times [2024-06-20 16:24:37,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:37,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826959464] [2024-06-20 16:24:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:37,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:37,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:38,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:38,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826959464] [2024-06-20 16:24:38,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826959464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:38,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:38,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682484064] [2024-06-20 16:24:38,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:38,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:38,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-20 16:24:38,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 718 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:38,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:38,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-20 16:24:38,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:40,575 INFO L124 PetriNetUnfolderBase]: 9082/13495 cut-off events. [2024-06-20 16:24:40,575 INFO L125 PetriNetUnfolderBase]: For 100325/100342 co-relation queries the response was YES. [2024-06-20 16:24:40,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57241 conditions, 13495 events. 9082/13495 cut-off events. For 100325/100342 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 82327 event pairs, 4665 based on Foata normal form. 19/13479 useless extension candidates. Maximal degree in co-relation 57210. Up to 12332 conditions per place. [2024-06-20 16:24:40,655 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 107 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2024-06-20 16:24:40,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 134 transitions, 1060 flow [2024-06-20 16:24:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:24:40,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:24:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 16:24:40,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-20 16:24:40,662 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 718 flow. Second operand 6 states and 150 transitions. [2024-06-20 16:24:40,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 134 transitions, 1060 flow [2024-06-20 16:24:40,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 1017 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-20 16:24:40,706 INFO L231 Difference]: Finished difference. Result has 91 places, 115 transitions, 762 flow [2024-06-20 16:24:40,706 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=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=762, PETRI_PLACES=91, PETRI_TRANSITIONS=115} [2024-06-20 16:24:40,707 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-20 16:24:40,707 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 115 transitions, 762 flow [2024-06-20 16:24:40,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:40,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:40,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:40,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:24:40,708 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)] === [2024-06-20 16:24:40,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1228745313, now seen corresponding path program 1 times [2024-06-20 16:24:40,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:40,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434659485] [2024-06-20 16:24:40,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:40,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:40,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:41,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:41,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434659485] [2024-06-20 16:24:41,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434659485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:41,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:41,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:41,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115795486] [2024-06-20 16:24:41,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:41,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:41,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:41,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:41,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 115 transitions, 762 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 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) [2024-06-20 16:24:41,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:41,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:41,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:44,086 INFO L124 PetriNetUnfolderBase]: 11096/15609 cut-off events. [2024-06-20 16:24:44,087 INFO L125 PetriNetUnfolderBase]: For 148656/148712 co-relation queries the response was YES. [2024-06-20 16:24:44,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73223 conditions, 15609 events. 11096/15609 cut-off events. For 148656/148712 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 89507 event pairs, 4133 based on Foata normal form. 42/15586 useless extension candidates. Maximal degree in co-relation 73191. Up to 14569 conditions per place. [2024-06-20 16:24:44,184 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 131 selfloop transitions, 41 changer transitions 0/181 dead transitions. [2024-06-20 16:24:44,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 181 transitions, 1468 flow [2024-06-20 16:24:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:24:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:24:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-20 16:24:44,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947589098532495 [2024-06-20 16:24:44,186 INFO L175 Difference]: Start difference. First operand has 91 places, 115 transitions, 762 flow. Second operand 9 states and 236 transitions. [2024-06-20 16:24:44,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 181 transitions, 1468 flow [2024-06-20 16:24:44,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 181 transitions, 1411 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 16:24:44,228 INFO L231 Difference]: Finished difference. Result has 96 places, 119 transitions, 880 flow [2024-06-20 16:24:44,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=705, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=880, PETRI_PLACES=96, PETRI_TRANSITIONS=119} [2024-06-20 16:24:44,229 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 40 predicate places. [2024-06-20 16:24:44,229 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 119 transitions, 880 flow [2024-06-20 16:24:44,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 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) [2024-06-20 16:24:44,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:44,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:44,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:24:44,230 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)] === [2024-06-20 16:24:44,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:44,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2097464451, now seen corresponding path program 2 times [2024-06-20 16:24:44,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:44,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637633945] [2024-06-20 16:24:44,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:44,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:45,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:45,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637633945] [2024-06-20 16:24:45,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637633945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:45,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:45,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:45,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778220189] [2024-06-20 16:24:45,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:45,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:45,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:45,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:45,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:45,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 119 transitions, 880 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 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) [2024-06-20 16:24:45,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:45,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:45,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:47,574 INFO L124 PetriNetUnfolderBase]: 11042/15531 cut-off events. [2024-06-20 16:24:47,575 INFO L125 PetriNetUnfolderBase]: For 168227/168275 co-relation queries the response was YES. [2024-06-20 16:24:47,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74845 conditions, 15531 events. 11042/15531 cut-off events. For 168227/168275 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 88960 event pairs, 4733 based on Foata normal form. 48/15514 useless extension candidates. Maximal degree in co-relation 74812. Up to 14719 conditions per place. [2024-06-20 16:24:47,673 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 123 selfloop transitions, 36 changer transitions 0/168 dead transitions. [2024-06-20 16:24:47,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 168 transitions, 1370 flow [2024-06-20 16:24:47,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 16:24:47,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-20 16:24:47,675 INFO L175 Difference]: Start difference. First operand has 96 places, 119 transitions, 880 flow. Second operand 8 states and 207 transitions. [2024-06-20 16:24:47,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 168 transitions, 1370 flow [2024-06-20 16:24:47,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 168 transitions, 1297 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:47,738 INFO L231 Difference]: Finished difference. Result has 99 places, 119 transitions, 891 flow [2024-06-20 16:24:47,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=891, PETRI_PLACES=99, PETRI_TRANSITIONS=119} [2024-06-20 16:24:47,738 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 43 predicate places. [2024-06-20 16:24:47,739 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 119 transitions, 891 flow [2024-06-20 16:24:47,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 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) [2024-06-20 16:24:47,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:47,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:47,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:24:47,739 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)] === [2024-06-20 16:24:47,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:47,740 INFO L85 PathProgramCache]: Analyzing trace with hash 418440149, now seen corresponding path program 3 times [2024-06-20 16:24:47,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:47,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102340974] [2024-06-20 16:24:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:47,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:48,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102340974] [2024-06-20 16:24:48,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102340974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:48,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:48,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:48,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441509052] [2024-06-20 16:24:48,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:48,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:48,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:48,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:48,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 119 transitions, 891 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 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) [2024-06-20 16:24:48,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:48,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:48,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:51,139 INFO L124 PetriNetUnfolderBase]: 11148/15702 cut-off events. [2024-06-20 16:24:51,140 INFO L125 PetriNetUnfolderBase]: For 185301/185343 co-relation queries the response was YES. [2024-06-20 16:24:51,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76879 conditions, 15702 events. 11148/15702 cut-off events. For 185301/185343 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 90421 event pairs, 4783 based on Foata normal form. 56/15688 useless extension candidates. Maximal degree in co-relation 76844. Up to 14792 conditions per place. [2024-06-20 16:24:51,260 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 101 selfloop transitions, 55 changer transitions 0/165 dead transitions. [2024-06-20 16:24:51,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 165 transitions, 1395 flow [2024-06-20 16:24:51,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 16:24:51,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-20 16:24:51,262 INFO L175 Difference]: Start difference. First operand has 99 places, 119 transitions, 891 flow. Second operand 8 states and 208 transitions. [2024-06-20 16:24:51,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 165 transitions, 1395 flow [2024-06-20 16:24:51,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 165 transitions, 1313 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:24:51,338 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 977 flow [2024-06-20 16:24:51,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-20 16:24:51,339 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-20 16:24:51,339 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 977 flow [2024-06-20 16:24:51,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 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) [2024-06-20 16:24:51,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:51,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:51,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:24:51,340 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:51,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1188350953, now seen corresponding path program 1 times [2024-06-20 16:24:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:51,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495395770] [2024-06-20 16:24:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:51,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:52,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:52,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495395770] [2024-06-20 16:24:52,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495395770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:52,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:52,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:52,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818150789] [2024-06-20 16:24:52,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:52,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:52,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:52,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:52,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:52,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:24:52,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 977 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:52,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:52,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:24:52,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:54,641 INFO L124 PetriNetUnfolderBase]: 11553/16065 cut-off events. [2024-06-20 16:24:54,641 INFO L125 PetriNetUnfolderBase]: For 204558/204566 co-relation queries the response was YES. [2024-06-20 16:24:54,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79315 conditions, 16065 events. 11553/16065 cut-off events. For 204558/204566 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 88510 event pairs, 5144 based on Foata normal form. 14/16047 useless extension candidates. Maximal degree in co-relation 79279. Up to 15529 conditions per place. [2024-06-20 16:24:54,769 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 131 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-20 16:24:54,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 173 transitions, 1540 flow [2024-06-20 16:24:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:24:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:24:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 16:24:54,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2024-06-20 16:24:54,777 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 977 flow. Second operand 8 states and 199 transitions. [2024-06-20 16:24:54,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 173 transitions, 1540 flow [2024-06-20 16:24:54,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 173 transitions, 1408 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 16:24:54,921 INFO L231 Difference]: Finished difference. Result has 103 places, 128 transitions, 1020 flow [2024-06-20 16:24:54,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1020, PETRI_PLACES=103, PETRI_TRANSITIONS=128} [2024-06-20 16:24:54,921 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-20 16:24:54,922 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 128 transitions, 1020 flow [2024-06-20 16:24:54,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:54,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:54,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:54,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:24:54,922 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:24:54,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:54,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1050376236, now seen corresponding path program 1 times [2024-06-20 16:24:54,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:54,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557372074] [2024-06-20 16:24:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:54,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:54,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:55,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:55,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:55,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557372074] [2024-06-20 16:24:55,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557372074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:55,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:55,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:24:55,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839798264] [2024-06-20 16:24:55,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:55,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:24:55,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:55,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:24:55,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:24:56,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:56,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 128 transitions, 1020 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:56,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:56,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:56,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:24:57,873 INFO L124 PetriNetUnfolderBase]: 10946/15533 cut-off events. [2024-06-20 16:24:57,873 INFO L125 PetriNetUnfolderBase]: For 230579/230600 co-relation queries the response was YES. [2024-06-20 16:24:57,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79997 conditions, 15533 events. 10946/15533 cut-off events. For 230579/230600 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 89052 event pairs, 5123 based on Foata normal form. 23/15429 useless extension candidates. Maximal degree in co-relation 79959. Up to 14744 conditions per place. [2024-06-20 16:24:58,040 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 112 selfloop transitions, 35 changer transitions 0/161 dead transitions. [2024-06-20 16:24:58,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 161 transitions, 1558 flow [2024-06-20 16:24:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:24:58,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:24:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 16:24:58,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-20 16:24:58,042 INFO L175 Difference]: Start difference. First operand has 103 places, 128 transitions, 1020 flow. Second operand 6 states and 154 transitions. [2024-06-20 16:24:58,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 161 transitions, 1558 flow [2024-06-20 16:24:58,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 161 transitions, 1446 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 16:24:58,175 INFO L231 Difference]: Finished difference. Result has 104 places, 136 transitions, 1103 flow [2024-06-20 16:24:58,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1103, PETRI_PLACES=104, PETRI_TRANSITIONS=136} [2024-06-20 16:24:58,176 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-20 16:24:58,176 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 136 transitions, 1103 flow [2024-06-20 16:24:58,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:24:58,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:24:58,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:24:58,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:24:58,177 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)] === [2024-06-20 16:24:58,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:24:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1243201233, now seen corresponding path program 4 times [2024-06-20 16:24:58,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:24:58,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523952780] [2024-06-20 16:24:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:24:58,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:24:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:24:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:24:59,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:24:59,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523952780] [2024-06-20 16:24:59,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523952780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:24:59,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:24:59,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:24:59,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393828751] [2024-06-20 16:24:59,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:24:59,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:24:59,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:24:59,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:24:59,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:24:59,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:24:59,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 136 transitions, 1103 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 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) [2024-06-20 16:24:59,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:24:59,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:24:59,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:01,585 INFO L124 PetriNetUnfolderBase]: 11163/15796 cut-off events. [2024-06-20 16:25:01,585 INFO L125 PetriNetUnfolderBase]: For 265399/265441 co-relation queries the response was YES. [2024-06-20 16:25:01,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85364 conditions, 15796 events. 11163/15796 cut-off events. For 265399/265441 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 91185 event pairs, 4941 based on Foata normal form. 62/15771 useless extension candidates. Maximal degree in co-relation 85325. Up to 14824 conditions per place. [2024-06-20 16:25:01,747 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 113 selfloop transitions, 57 changer transitions 0/180 dead transitions. [2024-06-20 16:25:01,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 180 transitions, 1641 flow [2024-06-20 16:25:01,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 16:25:01,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834905660377358 [2024-06-20 16:25:01,749 INFO L175 Difference]: Start difference. First operand has 104 places, 136 transitions, 1103 flow. Second operand 8 states and 205 transitions. [2024-06-20 16:25:01,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 180 transitions, 1641 flow [2024-06-20 16:25:01,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 180 transitions, 1591 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-20 16:25:01,904 INFO L231 Difference]: Finished difference. Result has 110 places, 138 transitions, 1235 flow [2024-06-20 16:25:01,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1235, PETRI_PLACES=110, PETRI_TRANSITIONS=138} [2024-06-20 16:25:01,905 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 54 predicate places. [2024-06-20 16:25:01,905 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 138 transitions, 1235 flow [2024-06-20 16:25:01,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 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) [2024-06-20 16:25:01,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:01,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:01,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:25:01,906 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)] === [2024-06-20 16:25:01,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:01,906 INFO L85 PathProgramCache]: Analyzing trace with hash 865916631, now seen corresponding path program 2 times [2024-06-20 16:25:01,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:01,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436450212] [2024-06-20 16:25:01,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:01,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:03,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:03,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:03,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436450212] [2024-06-20 16:25:03,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436450212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:03,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:03,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:03,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681752349] [2024-06-20 16:25:03,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:03,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:03,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:03,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:03,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:03,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:03,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 138 transitions, 1235 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:03,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:03,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:03,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:05,426 INFO L124 PetriNetUnfolderBase]: 11705/16414 cut-off events. [2024-06-20 16:25:05,426 INFO L125 PetriNetUnfolderBase]: For 292676/292693 co-relation queries the response was YES. [2024-06-20 16:25:05,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89718 conditions, 16414 events. 11705/16414 cut-off events. For 292676/292693 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 91698 event pairs, 5146 based on Foata normal form. 20/16341 useless extension candidates. Maximal degree in co-relation 89677. Up to 15744 conditions per place. [2024-06-20 16:25:05,587 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 141 selfloop transitions, 43 changer transitions 0/191 dead transitions. [2024-06-20 16:25:05,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 191 transitions, 1871 flow [2024-06-20 16:25:05,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 16:25:05,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45990566037735847 [2024-06-20 16:25:05,589 INFO L175 Difference]: Start difference. First operand has 110 places, 138 transitions, 1235 flow. Second operand 8 states and 195 transitions. [2024-06-20 16:25:05,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 191 transitions, 1871 flow [2024-06-20 16:25:05,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 191 transitions, 1719 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:25:05,757 INFO L231 Difference]: Finished difference. Result has 113 places, 149 transitions, 1329 flow [2024-06-20 16:25:05,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1329, PETRI_PLACES=113, PETRI_TRANSITIONS=149} [2024-06-20 16:25:05,758 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-20 16:25:05,758 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 149 transitions, 1329 flow [2024-06-20 16:25:05,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:05,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:05,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:05,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:25:05,759 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)] === [2024-06-20 16:25:05,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:05,759 INFO L85 PathProgramCache]: Analyzing trace with hash 8249051, now seen corresponding path program 3 times [2024-06-20 16:25:05,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:05,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741912619] [2024-06-20 16:25:05,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:05,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:06,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:06,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741912619] [2024-06-20 16:25:06,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741912619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:06,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:06,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:06,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665673522] [2024-06-20 16:25:06,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:06,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:06,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:06,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:06,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:07,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:07,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 149 transitions, 1329 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:07,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:07,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:07,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:09,320 INFO L124 PetriNetUnfolderBase]: 11741/16450 cut-off events. [2024-06-20 16:25:09,320 INFO L125 PetriNetUnfolderBase]: For 323047/323064 co-relation queries the response was YES. [2024-06-20 16:25:09,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93114 conditions, 16450 events. 11741/16450 cut-off events. For 323047/323064 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 91808 event pairs, 4803 based on Foata normal form. 20/16377 useless extension candidates. Maximal degree in co-relation 93071. Up to 15659 conditions per place. [2024-06-20 16:25:09,469 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 140 selfloop transitions, 54 changer transitions 0/201 dead transitions. [2024-06-20 16:25:09,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 201 transitions, 2113 flow [2024-06-20 16:25:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:09,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:09,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 16:25:09,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2024-06-20 16:25:09,471 INFO L175 Difference]: Start difference. First operand has 113 places, 149 transitions, 1329 flow. Second operand 8 states and 199 transitions. [2024-06-20 16:25:09,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 201 transitions, 2113 flow [2024-06-20 16:25:09,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 201 transitions, 2003 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 16:25:09,640 INFO L231 Difference]: Finished difference. Result has 118 places, 155 transitions, 1483 flow [2024-06-20 16:25:09,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1483, PETRI_PLACES=118, PETRI_TRANSITIONS=155} [2024-06-20 16:25:09,641 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-20 16:25:09,641 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 155 transitions, 1483 flow [2024-06-20 16:25:09,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:09,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:09,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:09,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:25:09,642 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:09,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:09,642 INFO L85 PathProgramCache]: Analyzing trace with hash -228222979, now seen corresponding path program 4 times [2024-06-20 16:25:09,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:09,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397790660] [2024-06-20 16:25:09,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:09,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:10,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:10,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397790660] [2024-06-20 16:25:10,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397790660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:10,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:10,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:10,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130820757] [2024-06-20 16:25:10,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:10,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:10,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:10,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:10,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:10,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:10,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 155 transitions, 1483 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:10,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:10,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:10,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:13,257 INFO L124 PetriNetUnfolderBase]: 11726/16341 cut-off events. [2024-06-20 16:25:13,258 INFO L125 PetriNetUnfolderBase]: For 346905/346922 co-relation queries the response was YES. [2024-06-20 16:25:13,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93899 conditions, 16341 events. 11726/16341 cut-off events. For 346905/346922 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 90233 event pairs, 5127 based on Foata normal form. 20/16328 useless extension candidates. Maximal degree in co-relation 93855. Up to 15775 conditions per place. [2024-06-20 16:25:13,385 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 148 selfloop transitions, 42 changer transitions 0/197 dead transitions. [2024-06-20 16:25:13,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2003 flow [2024-06-20 16:25:13,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:25:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:25:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 16:25:13,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-20 16:25:13,386 INFO L175 Difference]: Start difference. First operand has 118 places, 155 transitions, 1483 flow. Second operand 8 states and 196 transitions. [2024-06-20 16:25:13,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2003 flow [2024-06-20 16:25:13,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 197 transitions, 1845 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:13,646 INFO L231 Difference]: Finished difference. Result has 122 places, 155 transitions, 1419 flow [2024-06-20 16:25:13,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1325, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1419, PETRI_PLACES=122, PETRI_TRANSITIONS=155} [2024-06-20 16:25:13,646 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-20 16:25:13,647 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 155 transitions, 1419 flow [2024-06-20 16:25:13,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:13,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:13,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:13,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:25:13,647 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)] === [2024-06-20 16:25:13,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1976089866, now seen corresponding path program 2 times [2024-06-20 16:25:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:13,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659184745] [2024-06-20 16:25:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:13,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:14,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:14,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659184745] [2024-06-20 16:25:14,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659184745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:14,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:14,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:25:14,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800258851] [2024-06-20 16:25:14,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:14,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:25:14,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:25:14,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:25:14,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:25:14,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 155 transitions, 1419 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:14,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:14,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:25:14,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:16,829 INFO L124 PetriNetUnfolderBase]: 11091/15676 cut-off events. [2024-06-20 16:25:16,829 INFO L125 PetriNetUnfolderBase]: For 363440/363455 co-relation queries the response was YES. [2024-06-20 16:25:16,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90945 conditions, 15676 events. 11091/15676 cut-off events. For 363440/363455 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 89196 event pairs, 5117 based on Foata normal form. 17/15629 useless extension candidates. Maximal degree in co-relation 90899. Up to 14935 conditions per place. [2024-06-20 16:25:16,958 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 119 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-20 16:25:16,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 173 transitions, 1783 flow [2024-06-20 16:25:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:25:16,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:25:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 16:25:16,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2024-06-20 16:25:16,960 INFO L175 Difference]: Start difference. First operand has 122 places, 155 transitions, 1419 flow. Second operand 6 states and 146 transitions. [2024-06-20 16:25:16,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 173 transitions, 1783 flow [2024-06-20 16:25:17,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 173 transitions, 1615 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-20 16:25:17,141 INFO L231 Difference]: Finished difference. Result has 119 places, 155 transitions, 1330 flow [2024-06-20 16:25:17,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1330, PETRI_PLACES=119, PETRI_TRANSITIONS=155} [2024-06-20 16:25:17,141 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-20 16:25:17,141 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 155 transitions, 1330 flow [2024-06-20 16:25:17,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:17,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:17,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:17,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:25:17,142 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)] === [2024-06-20 16:25:17,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:17,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1056096108, now seen corresponding path program 1 times [2024-06-20 16:25:17,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:17,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233721541] [2024-06-20 16:25:17,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:17,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:18,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:18,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233721541] [2024-06-20 16:25:18,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233721541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:18,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:18,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:25:18,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473927963] [2024-06-20 16:25:18,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:18,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:25:18,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:18,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:25:18,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:25:18,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:25:18,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 155 transitions, 1330 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:18,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:18,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:25:18,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:20,072 INFO L124 PetriNetUnfolderBase]: 10333/14732 cut-off events. [2024-06-20 16:25:20,072 INFO L125 PetriNetUnfolderBase]: For 337167/337173 co-relation queries the response was YES. [2024-06-20 16:25:20,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85477 conditions, 14732 events. 10333/14732 cut-off events. For 337167/337173 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 84252 event pairs, 4376 based on Foata normal form. 6/14682 useless extension candidates. Maximal degree in co-relation 85432. Up to 14061 conditions per place. [2024-06-20 16:25:20,206 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 157 selfloop transitions, 21 changer transitions 0/186 dead transitions. [2024-06-20 16:25:20,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 186 transitions, 1960 flow [2024-06-20 16:25:20,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:25:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:25:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 16:25:20,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748427672955975 [2024-06-20 16:25:20,207 INFO L175 Difference]: Start difference. First operand has 119 places, 155 transitions, 1330 flow. Second operand 6 states and 151 transitions. [2024-06-20 16:25:20,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 186 transitions, 1960 flow [2024-06-20 16:25:20,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 186 transitions, 1859 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:20,529 INFO L231 Difference]: Finished difference. Result has 120 places, 163 transitions, 1404 flow [2024-06-20 16:25:20,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1229, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1404, PETRI_PLACES=120, PETRI_TRANSITIONS=163} [2024-06-20 16:25:20,529 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-20 16:25:20,529 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 163 transitions, 1404 flow [2024-06-20 16:25:20,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:20,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:20,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:20,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:25:20,530 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:20,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:20,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2006482638, now seen corresponding path program 2 times [2024-06-20 16:25:20,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:20,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191520840] [2024-06-20 16:25:20,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:20,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:21,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:21,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191520840] [2024-06-20 16:25:21,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191520840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:21,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:21,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:25:21,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222245409] [2024-06-20 16:25:21,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:21,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:25:21,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:25:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:25:21,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:25:21,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 163 transitions, 1404 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:21,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:21,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:25:21,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:23,658 INFO L124 PetriNetUnfolderBase]: 10326/14756 cut-off events. [2024-06-20 16:25:23,658 INFO L125 PetriNetUnfolderBase]: For 366966/366973 co-relation queries the response was YES. [2024-06-20 16:25:23,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88499 conditions, 14756 events. 10326/14756 cut-off events. For 366966/366973 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 84730 event pairs, 4395 based on Foata normal form. 6/14705 useless extension candidates. Maximal degree in co-relation 88453. Up to 14054 conditions per place. [2024-06-20 16:25:23,827 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 152 selfloop transitions, 21 changer transitions 0/181 dead transitions. [2024-06-20 16:25:23,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 181 transitions, 1806 flow [2024-06-20 16:25:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:25:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:25:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 16:25:23,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2024-06-20 16:25:23,829 INFO L175 Difference]: Start difference. First operand has 120 places, 163 transitions, 1404 flow. Second operand 6 states and 146 transitions. [2024-06-20 16:25:23,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 181 transitions, 1806 flow [2024-06-20 16:25:24,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 1708 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-06-20 16:25:24,206 INFO L231 Difference]: Finished difference. Result has 124 places, 163 transitions, 1357 flow [2024-06-20 16:25:24,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1357, PETRI_PLACES=124, PETRI_TRANSITIONS=163} [2024-06-20 16:25:24,206 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-20 16:25:24,207 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 163 transitions, 1357 flow [2024-06-20 16:25:24,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:24,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:24,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:24,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:25:24,207 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)] === [2024-06-20 16:25:24,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1190249643, now seen corresponding path program 1 times [2024-06-20 16:25:24,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:24,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280431308] [2024-06-20 16:25:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:25,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:25,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280431308] [2024-06-20 16:25:25,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280431308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:25,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:25,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:25,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837554705] [2024-06-20 16:25:25,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:25,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:25,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:25,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:25,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:25,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:25,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 163 transitions, 1357 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-20 16:25:25,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:25,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:25,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:27,911 INFO L124 PetriNetUnfolderBase]: 11997/16780 cut-off events. [2024-06-20 16:25:27,911 INFO L125 PetriNetUnfolderBase]: For 460258/460260 co-relation queries the response was YES. [2024-06-20 16:25:28,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102541 conditions, 16780 events. 11997/16780 cut-off events. For 460258/460260 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 93625 event pairs, 4995 based on Foata normal form. 18/16763 useless extension candidates. Maximal degree in co-relation 102493. Up to 15557 conditions per place. [2024-06-20 16:25:28,089 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 148 selfloop transitions, 79 changer transitions 0/234 dead transitions. [2024-06-20 16:25:28,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 234 transitions, 2202 flow [2024-06-20 16:25:28,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-20 16:25:28,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480083857442348 [2024-06-20 16:25:28,091 INFO L175 Difference]: Start difference. First operand has 124 places, 163 transitions, 1357 flow. Second operand 9 states and 229 transitions. [2024-06-20 16:25:28,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 234 transitions, 2202 flow [2024-06-20 16:25:28,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 234 transitions, 2143 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 16:25:28,447 INFO L231 Difference]: Finished difference. Result has 130 places, 179 transitions, 1710 flow [2024-06-20 16:25:28,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1710, PETRI_PLACES=130, PETRI_TRANSITIONS=179} [2024-06-20 16:25:28,447 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-20 16:25:28,447 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 179 transitions, 1710 flow [2024-06-20 16:25:28,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-20 16:25:28,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:28,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:28,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:25:28,448 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:28,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:28,449 INFO L85 PathProgramCache]: Analyzing trace with hash 268747810, now seen corresponding path program 1 times [2024-06-20 16:25:28,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:28,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049843204] [2024-06-20 16:25:28,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:28,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:29,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:29,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049843204] [2024-06-20 16:25:29,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049843204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:29,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:29,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:29,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347562544] [2024-06-20 16:25:29,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:29,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:29,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:29,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:29,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:29,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:25:29,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 1710 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:29,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:29,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:25:29,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:32,091 INFO L124 PetriNetUnfolderBase]: 11403/16283 cut-off events. [2024-06-20 16:25:32,092 INFO L125 PetriNetUnfolderBase]: For 505665/505686 co-relation queries the response was YES. [2024-06-20 16:25:32,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103019 conditions, 16283 events. 11403/16283 cut-off events. For 505665/505686 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 94654 event pairs, 4927 based on Foata normal form. 24/16170 useless extension candidates. Maximal degree in co-relation 102968. Up to 15304 conditions per place. [2024-06-20 16:25:32,261 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 155 selfloop transitions, 45 changer transitions 0/219 dead transitions. [2024-06-20 16:25:32,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 219 transitions, 2440 flow [2024-06-20 16:25:32,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:25:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:25:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 16:25:32,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-20 16:25:32,266 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 1710 flow. Second operand 7 states and 180 transitions. [2024-06-20 16:25:32,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 219 transitions, 2440 flow [2024-06-20 16:25:32,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 219 transitions, 2282 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:32,598 INFO L231 Difference]: Finished difference. Result has 133 places, 187 transitions, 1795 flow [2024-06-20 16:25:32,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1795, PETRI_PLACES=133, PETRI_TRANSITIONS=187} [2024-06-20 16:25:32,603 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 77 predicate places. [2024-06-20 16:25:32,603 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 187 transitions, 1795 flow [2024-06-20 16:25:32,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:32,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:32,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:32,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:25:32,604 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)] === [2024-06-20 16:25:32,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:32,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1696355623, now seen corresponding path program 2 times [2024-06-20 16:25:32,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:32,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962617358] [2024-06-20 16:25:32,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:32,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:32,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:33,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:33,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962617358] [2024-06-20 16:25:33,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962617358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:33,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:33,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:33,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227381076] [2024-06-20 16:25:33,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:33,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:33,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:33,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:33,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:33,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 187 transitions, 1795 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-20 16:25:33,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:33,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:33,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:36,663 INFO L124 PetriNetUnfolderBase]: 12303/17336 cut-off events. [2024-06-20 16:25:36,663 INFO L125 PetriNetUnfolderBase]: For 552516/552518 co-relation queries the response was YES. [2024-06-20 16:25:36,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111953 conditions, 17336 events. 12303/17336 cut-off events. For 552516/552518 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 98121 event pairs, 5019 based on Foata normal form. 18/17247 useless extension candidates. Maximal degree in co-relation 111901. Up to 16164 conditions per place. [2024-06-20 16:25:36,868 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 160 selfloop transitions, 81 changer transitions 0/248 dead transitions. [2024-06-20 16:25:36,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 248 transitions, 2597 flow [2024-06-20 16:25:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-20 16:25:36,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758909853249476 [2024-06-20 16:25:36,870 INFO L175 Difference]: Start difference. First operand has 133 places, 187 transitions, 1795 flow. Second operand 9 states and 227 transitions. [2024-06-20 16:25:36,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 248 transitions, 2597 flow [2024-06-20 16:25:37,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 248 transitions, 2521 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 16:25:37,316 INFO L231 Difference]: Finished difference. Result has 141 places, 196 transitions, 2057 flow [2024-06-20 16:25:37,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2057, PETRI_PLACES=141, PETRI_TRANSITIONS=196} [2024-06-20 16:25:37,317 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-20 16:25:37,317 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 196 transitions, 2057 flow [2024-06-20 16:25:37,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-20 16:25:37,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:37,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:37,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:25:37,317 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:37,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:37,318 INFO L85 PathProgramCache]: Analyzing trace with hash -782039907, now seen corresponding path program 3 times [2024-06-20 16:25:37,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:37,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539855019] [2024-06-20 16:25:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:37,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:38,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:38,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:38,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539855019] [2024-06-20 16:25:38,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539855019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:38,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:38,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:38,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793489736] [2024-06-20 16:25:38,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:38,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:38,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:38,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:38,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:39,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:39,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 196 transitions, 2057 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-20 16:25:39,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:39,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:39,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:41,866 INFO L124 PetriNetUnfolderBase]: 12487/17648 cut-off events. [2024-06-20 16:25:41,866 INFO L125 PetriNetUnfolderBase]: For 604565/604567 co-relation queries the response was YES. [2024-06-20 16:25:41,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117068 conditions, 17648 events. 12487/17648 cut-off events. For 604565/604567 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 100506 event pairs, 5067 based on Foata normal form. 18/17559 useless extension candidates. Maximal degree in co-relation 117012. Up to 16444 conditions per place. [2024-06-20 16:25:42,054 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 162 selfloop transitions, 86 changer transitions 0/255 dead transitions. [2024-06-20 16:25:42,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 255 transitions, 2875 flow [2024-06-20 16:25:42,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-20 16:25:42,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47379454926624737 [2024-06-20 16:25:42,056 INFO L175 Difference]: Start difference. First operand has 141 places, 196 transitions, 2057 flow. Second operand 9 states and 226 transitions. [2024-06-20 16:25:42,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 255 transitions, 2875 flow [2024-06-20 16:25:42,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 255 transitions, 2685 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:42,489 INFO L231 Difference]: Finished difference. Result has 147 places, 203 transitions, 2202 flow [2024-06-20 16:25:42,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1870, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2202, PETRI_PLACES=147, PETRI_TRANSITIONS=203} [2024-06-20 16:25:42,490 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-20 16:25:42,490 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 203 transitions, 2202 flow [2024-06-20 16:25:42,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-20 16:25:42,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:42,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:42,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:25:42,491 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:42,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:42,491 INFO L85 PathProgramCache]: Analyzing trace with hash 255721527, now seen corresponding path program 4 times [2024-06-20 16:25:42,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:42,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714210600] [2024-06-20 16:25:42,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:42,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:42,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:43,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:43,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714210600] [2024-06-20 16:25:43,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714210600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:43,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:43,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:25:43,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199774052] [2024-06-20 16:25:43,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:43,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:25:43,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:43,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:25:43,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:25:43,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-20 16:25:43,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 203 transitions, 2202 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-20 16:25:43,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:43,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-20 16:25:43,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:46,668 INFO L124 PetriNetUnfolderBase]: 12448/17591 cut-off events. [2024-06-20 16:25:46,668 INFO L125 PetriNetUnfolderBase]: For 640515/640517 co-relation queries the response was YES. [2024-06-20 16:25:46,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117871 conditions, 17591 events. 12448/17591 cut-off events. For 640515/640517 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 100056 event pairs, 4609 based on Foata normal form. 18/17502 useless extension candidates. Maximal degree in co-relation 117813. Up to 15445 conditions per place. [2024-06-20 16:25:46,873 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 144 selfloop transitions, 106 changer transitions 0/257 dead transitions. [2024-06-20 16:25:46,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 257 transitions, 2926 flow [2024-06-20 16:25:46,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:25:46,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:25:46,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-20 16:25:46,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-20 16:25:46,875 INFO L175 Difference]: Start difference. First operand has 147 places, 203 transitions, 2202 flow. Second operand 9 states and 225 transitions. [2024-06-20 16:25:46,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 257 transitions, 2926 flow [2024-06-20 16:25:47,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 257 transitions, 2740 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:47,561 INFO L231 Difference]: Finished difference. Result has 151 places, 204 transitions, 2277 flow [2024-06-20 16:25:47,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1972, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2277, PETRI_PLACES=151, PETRI_TRANSITIONS=204} [2024-06-20 16:25:47,570 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-20 16:25:47,571 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 204 transitions, 2277 flow [2024-06-20 16:25:47,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 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) [2024-06-20 16:25:47,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:47,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:47,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:25:47,571 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)] === [2024-06-20 16:25:47,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:47,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1129661480, now seen corresponding path program 2 times [2024-06-20 16:25:47,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:47,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855165913] [2024-06-20 16:25:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:47,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:48,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:48,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855165913] [2024-06-20 16:25:48,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855165913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:48,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:48,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:48,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626833222] [2024-06-20 16:25:48,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:48,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:48,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:48,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:49,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:25:49,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 204 transitions, 2277 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:49,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:49,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:25:49,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:51,932 INFO L124 PetriNetUnfolderBase]: 11772/16844 cut-off events. [2024-06-20 16:25:51,932 INFO L125 PetriNetUnfolderBase]: For 671142/671199 co-relation queries the response was YES. [2024-06-20 16:25:52,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115668 conditions, 16844 events. 11772/16844 cut-off events. For 671142/671199 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 98578 event pairs, 4959 based on Foata normal form. 31/16691 useless extension candidates. Maximal degree in co-relation 115609. Up to 15854 conditions per place. [2024-06-20 16:25:52,103 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 165 selfloop transitions, 50 changer transitions 0/234 dead transitions. [2024-06-20 16:25:52,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 234 transitions, 2973 flow [2024-06-20 16:25:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:25:52,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:25:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 16:25:52,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-20 16:25:52,105 INFO L175 Difference]: Start difference. First operand has 151 places, 204 transitions, 2277 flow. Second operand 7 states and 171 transitions. [2024-06-20 16:25:52,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 234 transitions, 2973 flow [2024-06-20 16:25:52,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 234 transitions, 2702 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 16:25:52,550 INFO L231 Difference]: Finished difference. Result has 151 places, 208 transitions, 2189 flow [2024-06-20 16:25:52,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2189, PETRI_PLACES=151, PETRI_TRANSITIONS=208} [2024-06-20 16:25:52,551 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-20 16:25:52,551 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 208 transitions, 2189 flow [2024-06-20 16:25:52,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:52,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:52,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:52,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:25:52,552 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)] === [2024-06-20 16:25:52,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:52,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1443809944, now seen corresponding path program 3 times [2024-06-20 16:25:52,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:52,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886376231] [2024-06-20 16:25:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:52,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:52,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:53,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:53,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886376231] [2024-06-20 16:25:53,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886376231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:53,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:53,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:53,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810596400] [2024-06-20 16:25:53,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:53,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:53,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:53,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:53,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:53,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:25:53,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 208 transitions, 2189 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:53,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:53,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:25:53,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:25:57,151 INFO L124 PetriNetUnfolderBase]: 11745/16821 cut-off events. [2024-06-20 16:25:57,151 INFO L125 PetriNetUnfolderBase]: For 691018/691075 co-relation queries the response was YES. [2024-06-20 16:25:57,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115209 conditions, 16821 events. 11745/16821 cut-off events. For 691018/691075 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 98478 event pairs, 4953 based on Foata normal form. 27/16683 useless extension candidates. Maximal degree in co-relation 115149. Up to 15833 conditions per place. [2024-06-20 16:25:57,324 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 165 selfloop transitions, 49 changer transitions 0/233 dead transitions. [2024-06-20 16:25:57,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 233 transitions, 2691 flow [2024-06-20 16:25:57,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:25:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:25:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 16:25:57,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-06-20 16:25:57,335 INFO L175 Difference]: Start difference. First operand has 151 places, 208 transitions, 2189 flow. Second operand 7 states and 171 transitions. [2024-06-20 16:25:57,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 233 transitions, 2691 flow [2024-06-20 16:25:57,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 233 transitions, 2511 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-20 16:25:57,881 INFO L231 Difference]: Finished difference. Result has 154 places, 208 transitions, 2116 flow [2024-06-20 16:25:57,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2116, PETRI_PLACES=154, PETRI_TRANSITIONS=208} [2024-06-20 16:25:57,882 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-20 16:25:57,883 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 208 transitions, 2116 flow [2024-06-20 16:25:57,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:57,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:25:57,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:25:57,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:25:57,883 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:25:57,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:25:57,884 INFO L85 PathProgramCache]: Analyzing trace with hash -271459390, now seen corresponding path program 1 times [2024-06-20 16:25:57,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:25:57,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404221995] [2024-06-20 16:25:57,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:25:57,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:25:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:25:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:25:59,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:25:59,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404221995] [2024-06-20 16:25:59,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404221995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:25:59,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:25:59,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:25:59,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930260301] [2024-06-20 16:25:59,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:25:59,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:25:59,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:25:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:25:59,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:25:59,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:25:59,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 208 transitions, 2116 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:25:59,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:25:59,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:25:59,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:01,989 INFO L124 PetriNetUnfolderBase]: 11105/16115 cut-off events. [2024-06-20 16:26:01,989 INFO L125 PetriNetUnfolderBase]: For 628261/628263 co-relation queries the response was YES. [2024-06-20 16:26:02,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108104 conditions, 16115 events. 11105/16115 cut-off events. For 628261/628263 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 95413 event pairs, 4330 based on Foata normal form. 2/15976 useless extension candidates. Maximal degree in co-relation 108043. Up to 15215 conditions per place. [2024-06-20 16:26:02,145 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 214 selfloop transitions, 18 changer transitions 0/240 dead transitions. [2024-06-20 16:26:02,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 240 transitions, 2748 flow [2024-06-20 16:26:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:26:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:26:02,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 16:26:02,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-20 16:26:02,147 INFO L175 Difference]: Start difference. First operand has 154 places, 208 transitions, 2116 flow. Second operand 7 states and 170 transitions. [2024-06-20 16:26:02,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 240 transitions, 2748 flow [2024-06-20 16:26:02,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 240 transitions, 2608 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:26:02,613 INFO L231 Difference]: Finished difference. Result has 154 places, 212 transitions, 2109 flow [2024-06-20 16:26:02,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1976, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2109, PETRI_PLACES=154, PETRI_TRANSITIONS=212} [2024-06-20 16:26:02,614 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-20 16:26:02,614 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 212 transitions, 2109 flow [2024-06-20 16:26:02,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:02,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:02,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:02,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:26:02,615 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)] === [2024-06-20 16:26:02,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:02,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1871053202, now seen corresponding path program 1 times [2024-06-20 16:26:02,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:02,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555831079] [2024-06-20 16:26:02,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:02,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:03,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:03,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555831079] [2024-06-20 16:26:03,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555831079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:03,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:03,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:03,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720294707] [2024-06-20 16:26:03,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:03,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:03,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:03,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:03,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:03,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:26:03,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 212 transitions, 2109 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:03,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:03,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:26:03,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:06,921 INFO L124 PetriNetUnfolderBase]: 11137/16142 cut-off events. [2024-06-20 16:26:06,921 INFO L125 PetriNetUnfolderBase]: For 680824/680828 co-relation queries the response was YES. [2024-06-20 16:26:06,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111306 conditions, 16142 events. 11137/16142 cut-off events. For 680824/680828 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 95457 event pairs, 4303 based on Foata normal form. 4/15998 useless extension candidates. Maximal degree in co-relation 111244. Up to 15184 conditions per place. [2024-06-20 16:26:07,075 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 211 selfloop transitions, 31 changer transitions 0/250 dead transitions. [2024-06-20 16:26:07,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 250 transitions, 2973 flow [2024-06-20 16:26:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:26:07,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:26:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 16:26:07,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-20 16:26:07,077 INFO L175 Difference]: Start difference. First operand has 154 places, 212 transitions, 2109 flow. Second operand 7 states and 176 transitions. [2024-06-20 16:26:07,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 250 transitions, 2973 flow [2024-06-20 16:26:07,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 250 transitions, 2870 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 16:26:07,575 INFO L231 Difference]: Finished difference. Result has 156 places, 220 transitions, 2249 flow [2024-06-20 16:26:07,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2249, PETRI_PLACES=156, PETRI_TRANSITIONS=220} [2024-06-20 16:26:07,575 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2024-06-20 16:26:07,575 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 220 transitions, 2249 flow [2024-06-20 16:26:07,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:07,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:07,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:07,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:26:07,576 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)] === [2024-06-20 16:26:07,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:07,576 INFO L85 PathProgramCache]: Analyzing trace with hash -271339420, now seen corresponding path program 2 times [2024-06-20 16:26:07,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:07,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103638326] [2024-06-20 16:26:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:07,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:08,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:08,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:08,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103638326] [2024-06-20 16:26:08,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103638326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:08,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:08,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:08,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340375207] [2024-06-20 16:26:08,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:08,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:08,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:08,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:08,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:08,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:26:08,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 220 transitions, 2249 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:08,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:08,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:26:08,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:26:11,533 INFO L124 PetriNetUnfolderBase]: 11153/16076 cut-off events. [2024-06-20 16:26:11,534 INFO L125 PetriNetUnfolderBase]: For 721229/721233 co-relation queries the response was YES. [2024-06-20 16:26:11,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114510 conditions, 16076 events. 11153/16076 cut-off events. For 721229/721233 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 94397 event pairs, 4320 based on Foata normal form. 4/15963 useless extension candidates. Maximal degree in co-relation 114447. Up to 15231 conditions per place. [2024-06-20 16:26:11,866 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 212 selfloop transitions, 35 changer transitions 0/255 dead transitions. [2024-06-20 16:26:11,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 255 transitions, 3141 flow [2024-06-20 16:26:11,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:26:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:26:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 16:26:11,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-20 16:26:11,868 INFO L175 Difference]: Start difference. First operand has 156 places, 220 transitions, 2249 flow. Second operand 7 states and 173 transitions. [2024-06-20 16:26:11,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 255 transitions, 3141 flow [2024-06-20 16:26:12,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 255 transitions, 3037 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-20 16:26:12,366 INFO L231 Difference]: Finished difference. Result has 160 places, 228 transitions, 2416 flow [2024-06-20 16:26:12,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2416, PETRI_PLACES=160, PETRI_TRANSITIONS=228} [2024-06-20 16:26:12,366 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 104 predicate places. [2024-06-20 16:26:12,366 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 228 transitions, 2416 flow [2024-06-20 16:26:12,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:12,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:26:12,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:26:12,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:26:12,367 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)] === [2024-06-20 16:26:12,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:26:12,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2071658852, now seen corresponding path program 2 times [2024-06-20 16:26:12,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:26:12,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902522070] [2024-06-20 16:26:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:26:12,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:26:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:26:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:26:13,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:26:13,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902522070] [2024-06-20 16:26:13,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902522070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:26:13,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:26:13,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:26:13,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714275284] [2024-06-20 16:26:13,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:26:13,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:26:13,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:26:13,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:26:13,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:26:13,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-20 16:26:13,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 228 transitions, 2416 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:26:13,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:26:13,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-20 16:26:13,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand