./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix021_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix021_tso.oepc.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/mix021_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix021_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:01:55,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:01:55,917 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:01:55,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:01:55,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:01:55,954 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:01:55,954 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:01:55,955 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:01:55,955 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:01:55,957 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:01:55,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:01:55,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:01:55,959 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:01:55,963 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:01:55,964 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:01:55,964 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:01:55,964 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:01:55,964 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:01:55,965 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:01:55,965 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:01:55,965 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:01:55,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:01:55,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:01:55,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:01:55,966 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:01:55,967 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:01:55,967 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:01:55,967 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:01:55,968 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:01:55,968 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:01:55,969 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:01:55,969 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:01:55,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:01:55,970 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:01:55,970 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:01:55,971 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:01:55,971 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:01:55,971 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:01:55,971 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:01:55,971 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:01:55,972 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:01:55,972 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:01:55,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:01:55,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:01:56,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:01:56,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:01:56,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:01:56,204 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:01:56,205 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:01:56,206 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix021_tso.oepc.yml/witness.yml [2024-06-20 16:01:56,400 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:01:56,401 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:01:56,402 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix021_tso.oepc.i [2024-06-20 16:01:57,383 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:01:57,577 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:01:57,577 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix021_tso.oepc.i [2024-06-20 16:01:57,594 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c125afd9/72251baec98d4e37a37c513421f0a4c9/FLAG3b3218bd1 [2024-06-20 16:01:57,606 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c125afd9/72251baec98d4e37a37c513421f0a4c9 [2024-06-20 16:01:57,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:01:57,607 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:01:57,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:01:57,608 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:01:57,612 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:01:57,613 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:01:56" (1/2) ... [2024-06-20 16:01:57,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab61a32 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:01:57, skipping insertion in model container [2024-06-20 16:01:57,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:01:56" (1/2) ... [2024-06-20 16:01:57,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6a026dfd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:01:57, skipping insertion in model container [2024-06-20 16:01:57,615 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:01:57" (2/2) ... [2024-06-20 16:01:57,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ab61a32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:57, skipping insertion in model container [2024-06-20 16:01:57,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:01:57" (2/2) ... [2024-06-20 16:01:57,615 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:01:57,722 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:01:57,723 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:01:57,723 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:01:57,723 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:01:57,723 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:01:57,723 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:01:57,724 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-20 16:01:57,755 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:01:58,033 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:01:58,043 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 16:01:58,161 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:01:58,187 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:01:58,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58 WrapperNode [2024-06-20 16:01:58,187 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:01:58,188 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:01:58,188 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:01:58,188 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:01:58,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,206 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,234 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-20 16:01:58,235 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:01:58,248 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:01:58,248 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:01:58,249 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:01:58,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,267 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,291 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 16:01:58,299 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,299 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,307 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,315 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,317 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,322 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,325 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:01:58,326 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:01:58,326 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:01:58,326 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:01:58,326 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (1/1) ... [2024-06-20 16:01:58,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:01:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:01:58,361 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 16:01:58,365 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 16:01:58,391 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:01:58,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:01:58,391 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:01:58,391 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:01:58,391 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:01:58,392 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:01:58,392 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:01:58,392 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:01:58,392 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:01:58,392 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:01:58,393 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:01:58,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:01:58,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:01:58,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:01:58,394 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 16:01:58,534 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:01:58,536 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:01:58,936 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:01:58,936 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:01:59,103 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:01:59,103 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:01:59,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:01:59 BoogieIcfgContainer [2024-06-20 16:01:59,104 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:01:59,107 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:01:59,107 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:01:59,109 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:01:59,109 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:01:56" (1/4) ... [2024-06-20 16:01:59,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d02deeb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:01:59, skipping insertion in model container [2024-06-20 16:01:59,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:01:57" (2/4) ... [2024-06-20 16:01:59,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d02deeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:01:59, skipping insertion in model container [2024-06-20 16:01:59,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:01:58" (3/4) ... [2024-06-20 16:01:59,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d02deeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:01:59, skipping insertion in model container [2024-06-20 16:01:59,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:01:59" (4/4) ... [2024-06-20 16:01:59,111 INFO L112 eAbstractionObserver]: Analyzing ICFG mix021_tso.oepc.i [2024-06-20 16:01:59,123 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:01:59,124 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:01:59,124 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:01:59,167 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:01:59,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 16:01:59,220 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-20 16:01:59,221 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:01:59,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:01:59,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 16:01:59,224 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-20 16:01:59,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:01:59,234 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;@332158ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:01:59,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:01:59,237 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:01:59,237 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:01:59,237 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:01:59,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:01:59,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:01:59,238 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 16:01:59,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:01:59,242 INFO L85 PathProgramCache]: Analyzing trace with hash 389440905, now seen corresponding path program 1 times [2024-06-20 16:01:59,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:01:59,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930792486] [2024-06-20 16:01:59,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:01:59,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:01:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:00,332 INFO 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 16:02:00,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:00,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930792486] [2024-06-20 16:02:00,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930792486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:00,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:00,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:02:00,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605210035] [2024-06-20 16:02:00,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:00,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:02:00,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:00,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:02:00,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:02:00,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-20 16:02:00,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 16:02:00,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:00,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-20 16:02:00,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:01,768 INFO L124 PetriNetUnfolderBase]: 8188/11796 cut-off events. [2024-06-20 16:02:01,768 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-20 16:02:01,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23349 conditions, 11796 events. 8188/11796 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 67309 event pairs, 6210 based on Foata normal form. 1/11430 useless extension candidates. Maximal degree in co-relation 23336. Up to 11164 conditions per place. [2024-06-20 16:02:01,823 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-20 16:02:01,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-20 16:02:01,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:02:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:02:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-20 16:02:01,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-20 16:02:01,833 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 96 transitions. [2024-06-20 16:02:01,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-20 16:02:01,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:01,838 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-20 16:02:01,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-20 16:02:01,841 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-20 16:02:01,841 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-20 16:02:01,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states 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 16:02:01,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:01,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:01,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:02:01,842 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 16:02:01,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:01,843 INFO L85 PathProgramCache]: Analyzing trace with hash 590575656, now seen corresponding path program 1 times [2024-06-20 16:02:01,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:01,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690959108] [2024-06-20 16:02:01,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:01,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:02,528 INFO 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 16:02:02,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:02,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690959108] [2024-06-20 16:02:02,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690959108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:02,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:02,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:02:02,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001228618] [2024-06-20 16:02:02,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:02,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:02:02,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:02,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:02:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:02:02,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:02:02,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 16:02:02,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:02,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:02:02,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:03,889 INFO L124 PetriNetUnfolderBase]: 9573/13387 cut-off events. [2024-06-20 16:02:03,889 INFO L125 PetriNetUnfolderBase]: For 2477/2477 co-relation queries the response was YES. [2024-06-20 16:02:03,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30225 conditions, 13387 events. 9573/13387 cut-off events. For 2477/2477 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 73607 event pairs, 6546 based on Foata normal form. 4/13387 useless extension candidates. Maximal degree in co-relation 30213. Up to 12974 conditions per place. [2024-06-20 16:02:03,980 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 53 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-20 16:02:03,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 321 flow [2024-06-20 16:02:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:02:03,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:02:03,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-20 16:02:03,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-20 16:02:03,984 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 122 transitions. [2024-06-20 16:02:03,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 321 flow [2024-06-20 16:02:03,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:02:03,987 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-20 16:02:03,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-20 16:02:03,989 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-20 16:02:03,989 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-20 16:02:03,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states 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 16:02:03,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:03,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:03,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:02:03,993 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 16:02:04,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:04,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1127976860, now seen corresponding path program 1 times [2024-06-20 16:02:04,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:04,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885572295] [2024-06-20 16:02:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:04,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:04,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:04,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:04,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885572295] [2024-06-20 16:02:04,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885572295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:04,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:04,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 16:02:04,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041295007] [2024-06-20 16:02:04,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:04,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 16:02:04,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:04,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 16:02:04,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 16:02:04,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:02:04,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 16:02:04,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:04,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:02:04,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:06,403 INFO L124 PetriNetUnfolderBase]: 9591/13433 cut-off events. [2024-06-20 16:02:06,404 INFO L125 PetriNetUnfolderBase]: For 7218/7218 co-relation queries the response was YES. [2024-06-20 16:02:06,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33742 conditions, 13433 events. 9591/13433 cut-off events. For 7218/7218 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 74020 event pairs, 5218 based on Foata normal form. 7/13434 useless extension candidates. Maximal degree in co-relation 33728. Up to 12895 conditions per place. [2024-06-20 16:02:06,468 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 71 selfloop transitions, 21 changer transitions 0/100 dead transitions. [2024-06-20 16:02:06,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 100 transitions, 537 flow [2024-06-20 16:02:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:02:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:02:06,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-06-20 16:02:06,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-20 16:02:06,470 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 5 states and 160 transitions. [2024-06-20 16:02:06,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 100 transitions, 537 flow [2024-06-20 16:02:06,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 100 transitions, 518 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 16:02:06,473 INFO L231 Difference]: Finished difference. Result has 62 places, 64 transitions, 310 flow [2024-06-20 16:02:06,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=64} [2024-06-20 16:02:06,474 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2024-06-20 16:02:06,474 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 64 transitions, 310 flow [2024-06-20 16:02:06,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states 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 16:02:06,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:06,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:06,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:02:06,475 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:06,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:06,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1782065219, now seen corresponding path program 1 times [2024-06-20 16:02:06,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:06,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706951152] [2024-06-20 16:02:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:06,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:07,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:07,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706951152] [2024-06-20 16:02:07,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706951152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:07,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:07,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:02:07,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417657387] [2024-06-20 16:02:07,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:07,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:02:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:02:07,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:02:07,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:02:07,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 64 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:07,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:07,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:02:07,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:08,783 INFO L124 PetriNetUnfolderBase]: 9620/13472 cut-off events. [2024-06-20 16:02:08,783 INFO L125 PetriNetUnfolderBase]: For 17177/17183 co-relation queries the response was YES. [2024-06-20 16:02:08,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39364 conditions, 13472 events. 9620/13472 cut-off events. For 17177/17183 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74341 event pairs, 4299 based on Foata normal form. 18/13484 useless extension candidates. Maximal degree in co-relation 39347. Up to 12860 conditions per place. [2024-06-20 16:02:08,848 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 78 selfloop transitions, 25 changer transitions 0/111 dead transitions. [2024-06-20 16:02:08,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 111 transitions, 682 flow [2024-06-20 16:02:08,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:02:08,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:02:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-20 16:02:08,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-20 16:02:08,852 INFO L175 Difference]: Start difference. First operand has 62 places, 64 transitions, 310 flow. Second operand 6 states and 185 transitions. [2024-06-20 16:02:08,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 111 transitions, 682 flow [2024-06-20 16:02:08,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 111 transitions, 670 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-20 16:02:08,860 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 387 flow [2024-06-20 16:02:08,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-20 16:02:08,862 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 12 predicate places. [2024-06-20 16:02:08,862 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 387 flow [2024-06-20 16:02:08,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:08,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:08,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:08,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:02:08,863 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 16:02:08,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:08,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1482374873, now seen corresponding path program 1 times [2024-06-20 16:02:08,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:08,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324535689] [2024-06-20 16:02:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:08,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:09,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324535689] [2024-06-20 16:02:09,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324535689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:09,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:09,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:02:09,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276255962] [2024-06-20 16:02:09,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:09,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:02:09,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:09,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:02:09,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:02:09,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:09,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 387 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:09,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:09,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:09,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:11,258 INFO L124 PetriNetUnfolderBase]: 8216/11812 cut-off events. [2024-06-20 16:02:11,258 INFO L125 PetriNetUnfolderBase]: For 21841/21841 co-relation queries the response was YES. [2024-06-20 16:02:11,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37374 conditions, 11812 events. 8216/11812 cut-off events. For 21841/21841 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 67358 event pairs, 4302 based on Foata normal form. 3/11643 useless extension candidates. Maximal degree in co-relation 37353. Up to 11191 conditions per place. [2024-06-20 16:02:11,336 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 66 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-06-20 16:02:11,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 583 flow [2024-06-20 16:02:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:02:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:02:11,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-20 16:02:11,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4846153846153846 [2024-06-20 16:02:11,338 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 387 flow. Second operand 5 states and 126 transitions. [2024-06-20 16:02:11,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 583 flow [2024-06-20 16:02:11,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 514 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:11,346 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 349 flow [2024-06-20 16:02:11,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=349, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-06-20 16:02:11,346 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-20 16:02:11,347 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 349 flow [2024-06-20 16:02:11,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:11,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:11,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:11,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:02:11,347 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 16:02:11,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:11,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1315032729, now seen corresponding path program 1 times [2024-06-20 16:02:11,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:11,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503974767] [2024-06-20 16:02:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:11,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:12,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:12,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503974767] [2024-06-20 16:02:12,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503974767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:12,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:12,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:02:12,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67227427] [2024-06-20 16:02:12,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:12,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:02:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:02:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:02:12,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:12,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 349 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 16:02:12,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:12,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:12,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:13,761 INFO L124 PetriNetUnfolderBase]: 8198/11876 cut-off events. [2024-06-20 16:02:13,761 INFO L125 PetriNetUnfolderBase]: For 25269/25269 co-relation queries the response was YES. [2024-06-20 16:02:13,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37924 conditions, 11876 events. 8198/11876 cut-off events. For 25269/25269 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 68279 event pairs, 4090 based on Foata normal form. 6/11700 useless extension candidates. Maximal degree in co-relation 37901. Up to 11137 conditions per place. [2024-06-20 16:02:13,839 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 74 selfloop transitions, 14 changer transitions 0/96 dead transitions. [2024-06-20 16:02:13,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 617 flow [2024-06-20 16:02:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:02:13,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:02:13,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 16:02:13,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483974358974359 [2024-06-20 16:02:13,841 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 349 flow. Second operand 6 states and 151 transitions. [2024-06-20 16:02:13,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 617 flow [2024-06-20 16:02:13,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 588 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:13,853 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 395 flow [2024-06-20 16:02:13,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=320, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=395, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-20 16:02:13,854 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-20 16:02:13,854 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 395 flow [2024-06-20 16:02:13,854 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 16:02:13,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:13,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:13,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:02:13,855 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 16:02:13,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:13,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2117028906, now seen corresponding path program 1 times [2024-06-20 16:02:13,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:13,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982926676] [2024-06-20 16:02:13,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:13,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:14,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:14,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982926676] [2024-06-20 16:02:14,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982926676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:14,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:14,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:02:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515435102] [2024-06-20 16:02:14,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:14,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:02:14,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:02:14,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:02:14,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:14,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 395 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:14,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:14,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:14,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:16,289 INFO L124 PetriNetUnfolderBase]: 9606/13495 cut-off events. [2024-06-20 16:02:16,290 INFO L125 PetriNetUnfolderBase]: For 40327/40339 co-relation queries the response was YES. [2024-06-20 16:02:16,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46780 conditions, 13495 events. 9606/13495 cut-off events. For 40327/40339 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 74567 event pairs, 4983 based on Foata normal form. 14/13503 useless extension candidates. Maximal degree in co-relation 46757. Up to 12914 conditions per place. [2024-06-20 16:02:16,371 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 73 selfloop transitions, 25 changer transitions 0/105 dead transitions. [2024-06-20 16:02:16,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 105 transitions, 734 flow [2024-06-20 16:02:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:02:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:02:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 16:02:16,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967948717948718 [2024-06-20 16:02:16,372 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 395 flow. Second operand 6 states and 155 transitions. [2024-06-20 16:02:16,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 105 transitions, 734 flow [2024-06-20 16:02:16,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 691 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:16,386 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 448 flow [2024-06-20 16:02:16,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=448, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-06-20 16:02:16,386 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 17 predicate places. [2024-06-20 16:02:16,387 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 448 flow [2024-06-20 16:02:16,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:16,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:16,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:16,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:02:16,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:16,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:16,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1366837896, now seen corresponding path program 2 times [2024-06-20 16:02:16,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:16,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567768869] [2024-06-20 16:02:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:16,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:17,233 INFO 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 16:02:17,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:17,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567768869] [2024-06-20 16:02:17,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567768869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:17,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:17,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:02:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624404584] [2024-06-20 16:02:17,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:17,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:02:17,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:17,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:02:17,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:02:17,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:17,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 448 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:17,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:17,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:17,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:18,736 INFO L124 PetriNetUnfolderBase]: 9582/13447 cut-off events. [2024-06-20 16:02:18,737 INFO L125 PetriNetUnfolderBase]: For 47036/47042 co-relation queries the response was YES. [2024-06-20 16:02:18,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47722 conditions, 13447 events. 9582/13447 cut-off events. For 47036/47042 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 74196 event pairs, 5003 based on Foata normal form. 4/13438 useless extension candidates. Maximal degree in co-relation 47698. Up to 12884 conditions per place. [2024-06-20 16:02:18,817 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 66 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-20 16:02:18,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 99 transitions, 694 flow [2024-06-20 16:02:18,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:02:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:02:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 16:02:18,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 16:02:18,819 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 448 flow. Second operand 6 states and 150 transitions. [2024-06-20 16:02:18,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 99 transitions, 694 flow [2024-06-20 16:02:18,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 651 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:18,835 INFO L231 Difference]: Finished difference. Result has 75 places, 75 transitions, 468 flow [2024-06-20 16:02:18,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=468, PETRI_PLACES=75, PETRI_TRANSITIONS=75} [2024-06-20 16:02:18,836 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-20 16:02:18,836 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 75 transitions, 468 flow [2024-06-20 16:02:18,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:18,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:18,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:18,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:02:18,837 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 16:02:18,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:18,837 INFO L85 PathProgramCache]: Analyzing trace with hash -808446168, now seen corresponding path program 1 times [2024-06-20 16:02:18,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:18,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392282833] [2024-06-20 16:02:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:18,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:19,716 INFO 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 16:02:19,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:19,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392282833] [2024-06-20 16:02:19,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392282833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:19,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:19,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:19,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752807122] [2024-06-20 16:02:19,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:19,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:19,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:19,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:19,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:19,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:19,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 75 transitions, 468 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:19,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:19,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:19,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:21,305 INFO L124 PetriNetUnfolderBase]: 9948/13917 cut-off events. [2024-06-20 16:02:21,306 INFO L125 PetriNetUnfolderBase]: For 57919/57928 co-relation queries the response was YES. [2024-06-20 16:02:21,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51082 conditions, 13917 events. 9948/13917 cut-off events. For 57919/57928 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 76278 event pairs, 4406 based on Foata normal form. 15/13924 useless extension candidates. Maximal degree in co-relation 51057. Up to 12950 conditions per place. [2024-06-20 16:02:21,391 INFO L140 encePairwiseOnDemand]: 36/52 looper letters, 103 selfloop transitions, 55 changer transitions 0/165 dead transitions. [2024-06-20 16:02:21,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 165 transitions, 1344 flow [2024-06-20 16:02:21,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:21,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-20 16:02:21,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168269230769231 [2024-06-20 16:02:21,393 INFO L175 Difference]: Start difference. First operand has 75 places, 75 transitions, 468 flow. Second operand 8 states and 215 transitions. [2024-06-20 16:02:21,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 165 transitions, 1344 flow [2024-06-20 16:02:21,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 165 transitions, 1181 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:21,419 INFO L231 Difference]: Finished difference. Result has 80 places, 108 transitions, 789 flow [2024-06-20 16:02:21,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=789, PETRI_PLACES=80, PETRI_TRANSITIONS=108} [2024-06-20 16:02:21,420 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-20 16:02:21,420 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 108 transitions, 789 flow [2024-06-20 16:02:21,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:21,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:21,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:21,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:02:21,421 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 16:02:21,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:21,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1203384792, now seen corresponding path program 2 times [2024-06-20 16:02:21,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:21,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934601456] [2024-06-20 16:02:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:21,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:22,349 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 16:02:22,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:22,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934601456] [2024-06-20 16:02:22,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934601456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:22,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:22,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:22,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537816375] [2024-06-20 16:02:22,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:22,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:22,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:22,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:22,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:22,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:22,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 108 transitions, 789 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:22,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:22,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:22,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:24,132 INFO L124 PetriNetUnfolderBase]: 10108/14131 cut-off events. [2024-06-20 16:02:24,133 INFO L125 PetriNetUnfolderBase]: For 76363/76375 co-relation queries the response was YES. [2024-06-20 16:02:24,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56896 conditions, 14131 events. 10108/14131 cut-off events. For 76363/76375 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 77247 event pairs, 4444 based on Foata normal form. 26/14149 useless extension candidates. Maximal degree in co-relation 56867. Up to 13062 conditions per place. [2024-06-20 16:02:24,224 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 89 selfloop transitions, 65 changer transitions 0/161 dead transitions. [2024-06-20 16:02:24,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 161 transitions, 1395 flow [2024-06-20 16:02:24,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 16:02:24,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2024-06-20 16:02:24,226 INFO L175 Difference]: Start difference. First operand has 80 places, 108 transitions, 789 flow. Second operand 7 states and 184 transitions. [2024-06-20 16:02:24,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 161 transitions, 1395 flow [2024-06-20 16:02:24,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 161 transitions, 1354 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 16:02:24,266 INFO L231 Difference]: Finished difference. Result has 85 places, 117 transitions, 998 flow [2024-06-20 16:02:24,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=998, PETRI_PLACES=85, PETRI_TRANSITIONS=117} [2024-06-20 16:02:24,267 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-20 16:02:24,267 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 117 transitions, 998 flow [2024-06-20 16:02:24,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:24,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:24,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:24,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:02:24,267 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 16:02:24,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash 577700038, now seen corresponding path program 3 times [2024-06-20 16:02:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:24,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169049800] [2024-06-20 16:02:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:24,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:25,207 INFO 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 16:02:25,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:25,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169049800] [2024-06-20 16:02:25,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169049800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:25,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:25,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:25,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382541819] [2024-06-20 16:02:25,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:25,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:25,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:25,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:25,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:25,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:25,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 117 transitions, 998 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:25,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:25,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:25,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:27,017 INFO L124 PetriNetUnfolderBase]: 10188/14253 cut-off events. [2024-06-20 16:02:27,017 INFO L125 PetriNetUnfolderBase]: For 90123/90133 co-relation queries the response was YES. [2024-06-20 16:02:27,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60002 conditions, 14253 events. 10188/14253 cut-off events. For 90123/90133 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 77974 event pairs, 4442 based on Foata normal form. 13/14236 useless extension candidates. Maximal degree in co-relation 59971. Up to 13104 conditions per place. [2024-06-20 16:02:27,120 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 90 selfloop transitions, 79 changer transitions 0/176 dead transitions. [2024-06-20 16:02:27,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 176 transitions, 1794 flow [2024-06-20 16:02:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 16:02:27,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-20 16:02:27,123 INFO L175 Difference]: Start difference. First operand has 85 places, 117 transitions, 998 flow. Second operand 7 states and 186 transitions. [2024-06-20 16:02:27,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 176 transitions, 1794 flow [2024-06-20 16:02:27,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 176 transitions, 1625 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:27,187 INFO L231 Difference]: Finished difference. Result has 88 places, 131 transitions, 1207 flow [2024-06-20 16:02:27,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1207, PETRI_PLACES=88, PETRI_TRANSITIONS=131} [2024-06-20 16:02:27,188 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 33 predicate places. [2024-06-20 16:02:27,188 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 131 transitions, 1207 flow [2024-06-20 16:02:27,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:27,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:27,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:27,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:02:27,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:27,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:27,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1026016122, now seen corresponding path program 4 times [2024-06-20 16:02:27,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:27,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808257827] [2024-06-20 16:02:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:27,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:28,118 INFO 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 16:02:28,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:28,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808257827] [2024-06-20 16:02:28,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808257827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:28,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:28,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:28,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647070731] [2024-06-20 16:02:28,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:28,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:28,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:28,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:28,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:28,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:28,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 131 transitions, 1207 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:28,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:28,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:28,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:29,959 INFO L124 PetriNetUnfolderBase]: 10156/14199 cut-off events. [2024-06-20 16:02:29,959 INFO L125 PetriNetUnfolderBase]: For 90547/90563 co-relation queries the response was YES. [2024-06-20 16:02:30,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59455 conditions, 14199 events. 10156/14199 cut-off events. For 90547/90563 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 77650 event pairs, 4424 based on Foata normal form. 19/14189 useless extension candidates. Maximal degree in co-relation 59423. Up to 13087 conditions per place. [2024-06-20 16:02:30,092 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 85 selfloop transitions, 81 changer transitions 0/173 dead transitions. [2024-06-20 16:02:30,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 173 transitions, 1741 flow [2024-06-20 16:02:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:30,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 16:02:30,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:02:30,095 INFO L175 Difference]: Start difference. First operand has 88 places, 131 transitions, 1207 flow. Second operand 7 states and 182 transitions. [2024-06-20 16:02:30,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 173 transitions, 1741 flow [2024-06-20 16:02:30,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 173 transitions, 1610 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-20 16:02:30,180 INFO L231 Difference]: Finished difference. Result has 93 places, 131 transitions, 1252 flow [2024-06-20 16:02:30,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1252, PETRI_PLACES=93, PETRI_TRANSITIONS=131} [2024-06-20 16:02:30,181 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-20 16:02:30,181 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 131 transitions, 1252 flow [2024-06-20 16:02:30,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:30,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:30,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:30,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:02:30,182 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:30,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:30,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1026007194, now seen corresponding path program 1 times [2024-06-20 16:02:30,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:30,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904719384] [2024-06-20 16:02:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:30,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:31,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:31,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904719384] [2024-06-20 16:02:31,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904719384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:31,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:31,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:02:31,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391796927] [2024-06-20 16:02:31,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:31,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:02:31,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:31,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:02:31,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:02:31,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:31,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 131 transitions, 1252 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 16:02:31,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:31,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:31,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:33,290 INFO L124 PetriNetUnfolderBase]: 8746/12483 cut-off events. [2024-06-20 16:02:33,290 INFO L125 PetriNetUnfolderBase]: For 85064/85066 co-relation queries the response was YES. [2024-06-20 16:02:33,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53078 conditions, 12483 events. 8746/12483 cut-off events. For 85064/85066 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 70383 event pairs, 3827 based on Foata normal form. 6/12351 useless extension candidates. Maximal degree in co-relation 53043. Up to 11846 conditions per place. [2024-06-20 16:02:33,381 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 142 selfloop transitions, 17 changer transitions 0/167 dead transitions. [2024-06-20 16:02:33,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 167 transitions, 1708 flow [2024-06-20 16:02:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:33,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 16:02:33,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 16:02:33,384 INFO L175 Difference]: Start difference. First operand has 93 places, 131 transitions, 1252 flow. Second operand 7 states and 175 transitions. [2024-06-20 16:02:33,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 167 transitions, 1708 flow [2024-06-20 16:02:33,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 167 transitions, 1501 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:33,466 INFO L231 Difference]: Finished difference. Result has 93 places, 134 transitions, 1131 flow [2024-06-20 16:02:33,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1131, PETRI_PLACES=93, PETRI_TRANSITIONS=134} [2024-06-20 16:02:33,467 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-20 16:02:33,468 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 134 transitions, 1131 flow [2024-06-20 16:02:33,468 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 16:02:33,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:33,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:33,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:02:33,468 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:33,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:33,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2001970125, now seen corresponding path program 1 times [2024-06-20 16:02:33,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:33,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842573722] [2024-06-20 16:02:33,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:33,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:34,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:34,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:34,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842573722] [2024-06-20 16:02:34,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842573722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:34,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:34,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:02:34,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801093267] [2024-06-20 16:02:34,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:34,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:02:34,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:34,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:02:34,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:02:34,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:02:34,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 134 transitions, 1131 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:34,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:34,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:02:34,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:35,724 INFO L124 PetriNetUnfolderBase]: 8739/12993 cut-off events. [2024-06-20 16:02:35,724 INFO L125 PetriNetUnfolderBase]: For 94858/94860 co-relation queries the response was YES. [2024-06-20 16:02:35,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54879 conditions, 12993 events. 8739/12993 cut-off events. For 94858/94860 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 77366 event pairs, 3988 based on Foata normal form. 2/12974 useless extension candidates. Maximal degree in co-relation 54844. Up to 11903 conditions per place. [2024-06-20 16:02:35,829 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 134 selfloop transitions, 10 changer transitions 0/152 dead transitions. [2024-06-20 16:02:35,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 152 transitions, 1501 flow [2024-06-20 16:02:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:02:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:02:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-20 16:02:35,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-20 16:02:35,831 INFO L175 Difference]: Start difference. First operand has 93 places, 134 transitions, 1131 flow. Second operand 5 states and 122 transitions. [2024-06-20 16:02:35,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 152 transitions, 1501 flow [2024-06-20 16:02:35,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 152 transitions, 1441 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:02:35,936 INFO L231 Difference]: Finished difference. Result has 93 places, 138 transitions, 1146 flow [2024-06-20 16:02:35,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1146, PETRI_PLACES=93, PETRI_TRANSITIONS=138} [2024-06-20 16:02:35,936 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-20 16:02:35,936 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 138 transitions, 1146 flow [2024-06-20 16:02:35,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:35,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:35,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:35,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:02:35,937 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 16:02:35,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash 6607900, now seen corresponding path program 1 times [2024-06-20 16:02:35,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:35,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918661030] [2024-06-20 16:02:35,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:35,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:36,863 INFO 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 16:02:36,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:36,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918661030] [2024-06-20 16:02:36,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918661030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:36,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:36,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:36,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300053385] [2024-06-20 16:02:36,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:36,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:36,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:36,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:36,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:36,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:36,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 138 transitions, 1146 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:36,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:36,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:36,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:38,790 INFO L124 PetriNetUnfolderBase]: 10222/14565 cut-off events. [2024-06-20 16:02:38,791 INFO L125 PetriNetUnfolderBase]: For 130598/130621 co-relation queries the response was YES. [2024-06-20 16:02:38,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65715 conditions, 14565 events. 10222/14565 cut-off events. For 130598/130621 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 81565 event pairs, 4407 based on Foata normal form. 30/14587 useless extension candidates. Maximal degree in co-relation 65679. Up to 13133 conditions per place. [2024-06-20 16:02:38,942 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 100 selfloop transitions, 86 changer transitions 0/193 dead transitions. [2024-06-20 16:02:38,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 193 transitions, 1860 flow [2024-06-20 16:02:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:38,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:38,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-20 16:02:38,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-20 16:02:38,944 INFO L175 Difference]: Start difference. First operand has 93 places, 138 transitions, 1146 flow. Second operand 7 states and 188 transitions. [2024-06-20 16:02:38,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 193 transitions, 1860 flow [2024-06-20 16:02:39,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 193 transitions, 1815 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:39,051 INFO L231 Difference]: Finished difference. Result has 97 places, 146 transitions, 1400 flow [2024-06-20 16:02:39,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=97, PETRI_TRANSITIONS=146} [2024-06-20 16:02:39,052 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-20 16:02:39,052 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 146 transitions, 1400 flow [2024-06-20 16:02:39,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:39,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:39,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:39,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:02:39,053 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 16:02:39,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:39,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1349778780, now seen corresponding path program 2 times [2024-06-20 16:02:39,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:39,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245558894] [2024-06-20 16:02:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:39,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:39,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:39,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245558894] [2024-06-20 16:02:39,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245558894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:39,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:39,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:39,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609026586] [2024-06-20 16:02:39,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:39,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:39,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:39,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:39,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:40,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:40,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 146 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:40,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:40,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:40,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:41,902 INFO L124 PetriNetUnfolderBase]: 10298/14671 cut-off events. [2024-06-20 16:02:41,902 INFO L125 PetriNetUnfolderBase]: For 147603/147628 co-relation queries the response was YES. [2024-06-20 16:02:41,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68250 conditions, 14671 events. 10298/14671 cut-off events. For 147603/147628 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 82283 event pairs, 4379 based on Foata normal form. 30/14693 useless extension candidates. Maximal degree in co-relation 68213. Up to 13200 conditions per place. [2024-06-20 16:02:42,009 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 101 selfloop transitions, 90 changer transitions 0/198 dead transitions. [2024-06-20 16:02:42,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 198 transitions, 2134 flow [2024-06-20 16:02:42,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:42,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 16:02:42,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054945054945055 [2024-06-20 16:02:42,011 INFO L175 Difference]: Start difference. First operand has 97 places, 146 transitions, 1400 flow. Second operand 7 states and 184 transitions. [2024-06-20 16:02:42,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 198 transitions, 2134 flow [2024-06-20 16:02:42,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 198 transitions, 1830 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:42,111 INFO L231 Difference]: Finished difference. Result has 98 places, 154 transitions, 1421 flow [2024-06-20 16:02:42,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1421, PETRI_PLACES=98, PETRI_TRANSITIONS=154} [2024-06-20 16:02:42,111 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 43 predicate places. [2024-06-20 16:02:42,111 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 154 transitions, 1421 flow [2024-06-20 16:02:42,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:42,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:42,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:42,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:02:42,112 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 16:02:42,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash 736185312, now seen corresponding path program 3 times [2024-06-20 16:02:42,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:42,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151944994] [2024-06-20 16:02:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:43,028 INFO 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 16:02:43,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:43,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151944994] [2024-06-20 16:02:43,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151944994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:43,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:43,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:43,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373572417] [2024-06-20 16:02:43,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:43,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:43,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:43,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:43,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:43,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:43,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 154 transitions, 1421 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:43,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:43,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:43,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:44,906 INFO L124 PetriNetUnfolderBase]: 10266/14633 cut-off events. [2024-06-20 16:02:44,906 INFO L125 PetriNetUnfolderBase]: For 158481/158535 co-relation queries the response was YES. [2024-06-20 16:02:44,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68660 conditions, 14633 events. 10266/14633 cut-off events. For 158481/158535 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 82057 event pairs, 4403 based on Foata normal form. 43/14645 useless extension candidates. Maximal degree in co-relation 68623. Up to 13173 conditions per place. [2024-06-20 16:02:45,025 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 98 selfloop transitions, 87 changer transitions 0/192 dead transitions. [2024-06-20 16:02:45,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 192 transitions, 1923 flow [2024-06-20 16:02:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:45,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 16:02:45,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-20 16:02:45,028 INFO L175 Difference]: Start difference. First operand has 98 places, 154 transitions, 1421 flow. Second operand 7 states and 176 transitions. [2024-06-20 16:02:45,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 192 transitions, 1923 flow [2024-06-20 16:02:45,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 192 transitions, 1714 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-20 16:02:45,152 INFO L231 Difference]: Finished difference. Result has 101 places, 154 transitions, 1401 flow [2024-06-20 16:02:45,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1401, PETRI_PLACES=101, PETRI_TRANSITIONS=154} [2024-06-20 16:02:45,152 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-20 16:02:45,152 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 154 transitions, 1401 flow [2024-06-20 16:02:45,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:45,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:45,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:45,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:02:45,153 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:45,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1659790071, now seen corresponding path program 1 times [2024-06-20 16:02:45,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:45,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292210901] [2024-06-20 16:02:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:45,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:46,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:46,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292210901] [2024-06-20 16:02:46,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292210901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:46,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:46,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:46,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605314957] [2024-06-20 16:02:46,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:46,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:46,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:46,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:46,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:46,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 154 transitions, 1401 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:46,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:46,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:46,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:47,941 INFO L124 PetriNetUnfolderBase]: 10302/14655 cut-off events. [2024-06-20 16:02:47,941 INFO L125 PetriNetUnfolderBase]: For 173916/173936 co-relation queries the response was YES. [2024-06-20 16:02:48,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69719 conditions, 14655 events. 10302/14655 cut-off events. For 173916/173936 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 82036 event pairs, 3806 based on Foata normal form. 22/14671 useless extension candidates. Maximal degree in co-relation 69681. Up to 13587 conditions per place. [2024-06-20 16:02:48,087 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 147 selfloop transitions, 46 changer transitions 0/200 dead transitions. [2024-06-20 16:02:48,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 200 transitions, 2087 flow [2024-06-20 16:02:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:48,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:48,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 16:02:48,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-20 16:02:48,096 INFO L175 Difference]: Start difference. First operand has 101 places, 154 transitions, 1401 flow. Second operand 7 states and 178 transitions. [2024-06-20 16:02:48,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 200 transitions, 2087 flow [2024-06-20 16:02:48,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 200 transitions, 1833 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 16:02:48,250 INFO L231 Difference]: Finished difference. Result has 101 places, 160 transitions, 1335 flow [2024-06-20 16:02:48,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1147, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1335, PETRI_PLACES=101, PETRI_TRANSITIONS=160} [2024-06-20 16:02:48,251 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-20 16:02:48,251 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 160 transitions, 1335 flow [2024-06-20 16:02:48,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:48,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:48,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:48,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:02:48,252 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 16:02:48,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1224794515, now seen corresponding path program 2 times [2024-06-20 16:02:48,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:48,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120141731] [2024-06-20 16:02:48,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:48,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:48,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:49,168 INFO 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 16:02:49,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:49,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120141731] [2024-06-20 16:02:49,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120141731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:49,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:49,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:02:49,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962758404] [2024-06-20 16:02:49,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:49,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:02:49,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:49,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:02:49,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:02:49,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:49,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 160 transitions, 1335 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:49,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:49,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:49,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:51,088 INFO L124 PetriNetUnfolderBase]: 10287/14633 cut-off events. [2024-06-20 16:02:51,089 INFO L125 PetriNetUnfolderBase]: For 193582/193594 co-relation queries the response was YES. [2024-06-20 16:02:51,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71399 conditions, 14633 events. 10287/14633 cut-off events. For 193582/193594 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 81895 event pairs, 4473 based on Foata normal form. 14/14641 useless extension candidates. Maximal degree in co-relation 71360. Up to 13702 conditions per place. [2024-06-20 16:02:51,276 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 146 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2024-06-20 16:02:51,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 198 transitions, 1847 flow [2024-06-20 16:02:51,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:02:51,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:02:51,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 16:02:51,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 16:02:51,278 INFO L175 Difference]: Start difference. First operand has 101 places, 160 transitions, 1335 flow. Second operand 7 states and 175 transitions. [2024-06-20 16:02:51,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 198 transitions, 1847 flow [2024-06-20 16:02:51,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 198 transitions, 1746 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-20 16:02:51,475 INFO L231 Difference]: Finished difference. Result has 105 places, 160 transitions, 1336 flow [2024-06-20 16:02:51,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1336, PETRI_PLACES=105, PETRI_TRANSITIONS=160} [2024-06-20 16:02:51,476 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-20 16:02:51,476 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 160 transitions, 1336 flow [2024-06-20 16:02:51,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:02:51,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:51,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:51,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:02:51,477 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 16:02:51,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:51,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1106522137, now seen corresponding path program 1 times [2024-06-20 16:02:51,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:51,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072149224] [2024-06-20 16:02:51,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:51,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:51,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:02:52,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:52,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072149224] [2024-06-20 16:02:52,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072149224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:52,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:52,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:52,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967328624] [2024-06-20 16:02:52,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:52,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:52,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:52,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:02:53,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:53,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 160 transitions, 1336 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 16:02:53,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:53,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:53,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:55,082 INFO L124 PetriNetUnfolderBase]: 10487/14871 cut-off events. [2024-06-20 16:02:55,082 INFO L125 PetriNetUnfolderBase]: For 220742/220757 co-relation queries the response was YES. [2024-06-20 16:02:55,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73967 conditions, 14871 events. 10487/14871 cut-off events. For 220742/220757 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 83037 event pairs, 4088 based on Foata normal form. 44/14903 useless extension candidates. Maximal degree in co-relation 73926. Up to 13216 conditions per place. [2024-06-20 16:02:55,179 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 112 selfloop transitions, 96 changer transitions 0/215 dead transitions. [2024-06-20 16:02:55,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 215 transitions, 1972 flow [2024-06-20 16:02:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:02:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:02:55,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 16:02:55,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:02:55,181 INFO L175 Difference]: Start difference. First operand has 105 places, 160 transitions, 1336 flow. Second operand 8 states and 208 transitions. [2024-06-20 16:02:55,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 215 transitions, 1972 flow [2024-06-20 16:02:55,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 215 transitions, 1870 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:55,308 INFO L231 Difference]: Finished difference. Result has 107 places, 163 transitions, 1493 flow [2024-06-20 16:02:55,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1493, PETRI_PLACES=107, PETRI_TRANSITIONS=163} [2024-06-20 16:02:55,309 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-20 16:02:55,309 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 163 transitions, 1493 flow [2024-06-20 16:02:55,309 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 16:02:55,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:55,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:55,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:02:55,310 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:02:55,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1454794270, now seen corresponding path program 1 times [2024-06-20 16:02:55,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:55,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965689946] [2024-06-20 16:02:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:55,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:56,158 INFO 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 16:02:56,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:56,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965689946] [2024-06-20 16:02:56,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965689946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:56,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:56,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:02:56,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313593427] [2024-06-20 16:02:56,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:56,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:02:56,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:56,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:02:56,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:02:56,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:02:56,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 163 transitions, 1493 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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 16:02:56,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:02:56,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:02:56,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:02:58,187 INFO L124 PetriNetUnfolderBase]: 10503/14912 cut-off events. [2024-06-20 16:02:58,187 INFO L125 PetriNetUnfolderBase]: For 241519/241527 co-relation queries the response was YES. [2024-06-20 16:02:58,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77320 conditions, 14912 events. 10503/14912 cut-off events. For 241519/241527 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 83483 event pairs, 4466 based on Foata normal form. 10/14918 useless extension candidates. Maximal degree in co-relation 77278. Up to 14242 conditions per place. [2024-06-20 16:02:58,294 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 169 selfloop transitions, 17 changer transitions 0/193 dead transitions. [2024-06-20 16:02:58,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 193 transitions, 2003 flow [2024-06-20 16:02:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:02:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:02:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 16:02:58,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 16:02:58,296 INFO L175 Difference]: Start difference. First operand has 107 places, 163 transitions, 1493 flow. Second operand 6 states and 144 transitions. [2024-06-20 16:02:58,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 193 transitions, 2003 flow [2024-06-20 16:02:58,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 193 transitions, 1792 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 16:02:58,468 INFO L231 Difference]: Finished difference. Result has 107 places, 167 transitions, 1382 flow [2024-06-20 16:02:58,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1382, PETRI_PLACES=107, PETRI_TRANSITIONS=167} [2024-06-20 16:02:58,469 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-20 16:02:58,469 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 167 transitions, 1382 flow [2024-06-20 16:02:58,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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 16:02:58,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:02:58,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:02:58,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:02:58,470 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 16:02:58,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:02:58,471 INFO L85 PathProgramCache]: Analyzing trace with hash -499427493, now seen corresponding path program 2 times [2024-06-20 16:02:58,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:02:58,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183767089] [2024-06-20 16:02:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:02:58,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:02:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:02:59,873 INFO 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 16:02:59,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:02:59,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183767089] [2024-06-20 16:02:59,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183767089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:02:59,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:02:59,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:02:59,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161848247] [2024-06-20 16:02:59,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:02:59,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:02:59,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:02:59,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:02:59,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:00,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:00,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 167 transitions, 1382 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 16:03:00,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:00,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:00,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:02,158 INFO L124 PetriNetUnfolderBase]: 10539/14931 cut-off events. [2024-06-20 16:03:02,158 INFO L125 PetriNetUnfolderBase]: For 264408/264418 co-relation queries the response was YES. [2024-06-20 16:03:02,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79583 conditions, 14931 events. 10539/14931 cut-off events. For 264408/264418 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 83150 event pairs, 4118 based on Foata normal form. 9/14895 useless extension candidates. Maximal degree in co-relation 79540. Up to 13537 conditions per place. [2024-06-20 16:03:02,303 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 112 selfloop transitions, 98 changer transitions 0/217 dead transitions. [2024-06-20 16:03:02,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 217 transitions, 2016 flow [2024-06-20 16:03:02,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 16:03:02,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-20 16:03:02,304 INFO L175 Difference]: Start difference. First operand has 107 places, 167 transitions, 1382 flow. Second operand 8 states and 203 transitions. [2024-06-20 16:03:02,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 217 transitions, 2016 flow [2024-06-20 16:03:02,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 217 transitions, 1948 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 16:03:02,520 INFO L231 Difference]: Finished difference. Result has 111 places, 170 transitions, 1583 flow [2024-06-20 16:03:02,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1583, PETRI_PLACES=111, PETRI_TRANSITIONS=170} [2024-06-20 16:03:02,521 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 56 predicate places. [2024-06-20 16:03:02,521 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 170 transitions, 1583 flow [2024-06-20 16:03:02,521 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 16:03:02,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:02,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:02,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:03:02,522 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:03:02,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:02,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1849319399, now seen corresponding path program 3 times [2024-06-20 16:03:02,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:02,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636592123] [2024-06-20 16:03:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:02,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:03,830 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 16:03:03,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:03,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636592123] [2024-06-20 16:03:03,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636592123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:03,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:03,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:03,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753845648] [2024-06-20 16:03:03,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:03,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:03,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:03,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:03,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:04,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:04,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 170 transitions, 1583 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 16:03:04,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:04,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:04,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:05,904 INFO L124 PetriNetUnfolderBase]: 10575/14975 cut-off events. [2024-06-20 16:03:05,904 INFO L125 PetriNetUnfolderBase]: For 296521/296535 co-relation queries the response was YES. [2024-06-20 16:03:05,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83318 conditions, 14975 events. 10575/14975 cut-off events. For 296521/296535 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 83497 event pairs, 4102 based on Foata normal form. 13/14943 useless extension candidates. Maximal degree in co-relation 83274. Up to 13589 conditions per place. [2024-06-20 16:03:06,043 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 113 selfloop transitions, 100 changer transitions 0/220 dead transitions. [2024-06-20 16:03:06,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 220 transitions, 2231 flow [2024-06-20 16:03:06,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:06,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 16:03:06,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-20 16:03:06,045 INFO L175 Difference]: Start difference. First operand has 111 places, 170 transitions, 1583 flow. Second operand 8 states and 202 transitions. [2024-06-20 16:03:06,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 220 transitions, 2231 flow [2024-06-20 16:03:06,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 220 transitions, 1990 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:06,308 INFO L231 Difference]: Finished difference. Result has 113 places, 173 transitions, 1621 flow [2024-06-20 16:03:06,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1621, PETRI_PLACES=113, PETRI_TRANSITIONS=173} [2024-06-20 16:03:06,308 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-20 16:03:06,308 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 173 transitions, 1621 flow [2024-06-20 16:03:06,309 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 16:03:06,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:06,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:06,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:03:06,309 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:03:06,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:06,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1849616069, now seen corresponding path program 4 times [2024-06-20 16:03:06,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:06,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504198866] [2024-06-20 16:03:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:06,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:07,677 INFO 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 16:03:07,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:07,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504198866] [2024-06-20 16:03:07,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504198866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:07,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:07,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:07,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068719592] [2024-06-20 16:03:07,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:07,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:07,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:07,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:07,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:07,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:07,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 173 transitions, 1621 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 16:03:07,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:07,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:07,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:09,994 INFO L124 PetriNetUnfolderBase]: 10560/14954 cut-off events. [2024-06-20 16:03:09,995 INFO L125 PetriNetUnfolderBase]: For 325181/325195 co-relation queries the response was YES. [2024-06-20 16:03:10,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85502 conditions, 14954 events. 10560/14954 cut-off events. For 325181/325195 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 83068 event pairs, 3796 based on Foata normal form. 13/14922 useless extension candidates. Maximal degree in co-relation 85457. Up to 13180 conditions per place. [2024-06-20 16:03:10,133 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 108 selfloop transitions, 111 changer transitions 0/226 dead transitions. [2024-06-20 16:03:10,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 226 transitions, 2295 flow [2024-06-20 16:03:10,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:10,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:10,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 16:03:10,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-20 16:03:10,136 INFO L175 Difference]: Start difference. First operand has 113 places, 173 transitions, 1621 flow. Second operand 8 states and 206 transitions. [2024-06-20 16:03:10,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 226 transitions, 2295 flow [2024-06-20 16:03:10,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 226 transitions, 2044 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:10,358 INFO L231 Difference]: Finished difference. Result has 115 places, 176 transitions, 1676 flow [2024-06-20 16:03:10,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1676, PETRI_PLACES=115, PETRI_TRANSITIONS=176} [2024-06-20 16:03:10,359 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-20 16:03:10,359 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 176 transitions, 1676 flow [2024-06-20 16:03:10,359 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 16:03:10,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:10,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:10,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:03:10,359 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 16:03:10,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash -252024340, now seen corresponding path program 2 times [2024-06-20 16:03:10,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:10,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250597415] [2024-06-20 16:03:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:11,304 INFO 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 16:03:11,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:11,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250597415] [2024-06-20 16:03:11,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250597415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:11,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:11,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:03:11,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136149500] [2024-06-20 16:03:11,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:11,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:03:11,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:03:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:03:11,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:11,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 176 transitions, 1676 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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 16:03:11,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:11,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:11,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:13,160 INFO L124 PetriNetUnfolderBase]: 10553/15001 cut-off events. [2024-06-20 16:03:13,161 INFO L125 PetriNetUnfolderBase]: For 355217/355241 co-relation queries the response was YES. [2024-06-20 16:03:13,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87966 conditions, 15001 events. 10553/15001 cut-off events. For 355217/355241 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 83943 event pairs, 4457 based on Foata normal form. 18/15009 useless extension candidates. Maximal degree in co-relation 87920. Up to 14298 conditions per place. [2024-06-20 16:03:13,276 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 170 selfloop transitions, 24 changer transitions 0/201 dead transitions. [2024-06-20 16:03:13,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 201 transitions, 2206 flow [2024-06-20 16:03:13,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:03:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:03:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 16:03:13,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44871794871794873 [2024-06-20 16:03:13,277 INFO L175 Difference]: Start difference. First operand has 115 places, 176 transitions, 1676 flow. Second operand 6 states and 140 transitions. [2024-06-20 16:03:13,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 201 transitions, 2206 flow [2024-06-20 16:03:13,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 201 transitions, 1926 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:13,522 INFO L231 Difference]: Finished difference. Result has 115 places, 180 transitions, 1529 flow [2024-06-20 16:03:13,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1396, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1529, PETRI_PLACES=115, PETRI_TRANSITIONS=180} [2024-06-20 16:03:13,523 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-20 16:03:13,523 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 180 transitions, 1529 flow [2024-06-20 16:03:13,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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 16:03:13,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:13,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:13,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:03:13,524 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:03:13,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1840596094, now seen corresponding path program 1 times [2024-06-20 16:03:13,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:13,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930859680] [2024-06-20 16:03:13,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:13,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:14,384 INFO 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 16:03:14,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:14,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930859680] [2024-06-20 16:03:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930859680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:14,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:14,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:03:14,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388504695] [2024-06-20 16:03:14,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:14,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:03:14,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:14,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:03:14,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:03:14,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:03:14,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 180 transitions, 1529 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:14,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:14,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:03:14,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:16,015 INFO L124 PetriNetUnfolderBase]: 9174/13486 cut-off events. [2024-06-20 16:03:16,016 INFO L125 PetriNetUnfolderBase]: For 323392/323394 co-relation queries the response was YES. [2024-06-20 16:03:16,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79317 conditions, 13486 events. 9174/13486 cut-off events. For 323392/323394 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 79077 event pairs, 3774 based on Foata normal form. 2/13443 useless extension candidates. Maximal degree in co-relation 79270. Up to 12511 conditions per place. [2024-06-20 16:03:16,131 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 183 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-20 16:03:16,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 205 transitions, 2049 flow [2024-06-20 16:03:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:03:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:03:16,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 16:03:16,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-20 16:03:16,132 INFO L175 Difference]: Start difference. First operand has 115 places, 180 transitions, 1529 flow. Second operand 6 states and 146 transitions. [2024-06-20 16:03:16,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 205 transitions, 2049 flow [2024-06-20 16:03:16,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 205 transitions, 1946 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 16:03:16,353 INFO L231 Difference]: Finished difference. Result has 117 places, 184 transitions, 1531 flow [2024-06-20 16:03:16,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1531, PETRI_PLACES=117, PETRI_TRANSITIONS=184} [2024-06-20 16:03:16,354 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-06-20 16:03:16,354 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 184 transitions, 1531 flow [2024-06-20 16:03:16,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:16,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:16,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:16,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:03:16,354 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 16:03:16,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:16,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1443360478, now seen corresponding path program 2 times [2024-06-20 16:03:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:16,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015222037] [2024-06-20 16:03:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:17,190 INFO 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 16:03:17,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:17,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015222037] [2024-06-20 16:03:17,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015222037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:17,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:17,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:03:17,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616180850] [2024-06-20 16:03:17,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:17,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:03:17,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:17,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:03:17,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:03:17,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:03:17,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 184 transitions, 1531 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:17,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:17,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:03:17,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:18,947 INFO L124 PetriNetUnfolderBase]: 9167/13515 cut-off events. [2024-06-20 16:03:18,948 INFO L125 PetriNetUnfolderBase]: For 346484/346492 co-relation queries the response was YES. [2024-06-20 16:03:19,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81865 conditions, 13515 events. 9167/13515 cut-off events. For 346484/346492 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 79627 event pairs, 3775 based on Foata normal form. 6/13478 useless extension candidates. Maximal degree in co-relation 81817. Up to 12484 conditions per place. [2024-06-20 16:03:19,078 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 177 selfloop transitions, 21 changer transitions 0/206 dead transitions. [2024-06-20 16:03:19,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 206 transitions, 2051 flow [2024-06-20 16:03:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:03:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:03:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 16:03:19,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46474358974358976 [2024-06-20 16:03:19,080 INFO L175 Difference]: Start difference. First operand has 117 places, 184 transitions, 1531 flow. Second operand 6 states and 145 transitions. [2024-06-20 16:03:19,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 206 transitions, 2051 flow [2024-06-20 16:03:19,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 206 transitions, 1976 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:03:19,445 INFO L231 Difference]: Finished difference. Result has 119 places, 188 transitions, 1583 flow [2024-06-20 16:03:19,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1456, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1583, PETRI_PLACES=119, PETRI_TRANSITIONS=188} [2024-06-20 16:03:19,446 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-20 16:03:19,446 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 188 transitions, 1583 flow [2024-06-20 16:03:19,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:19,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:19,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:19,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:03:19,447 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:03:19,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:19,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1443352542, now seen corresponding path program 1 times [2024-06-20 16:03:19,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:19,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701450112] [2024-06-20 16:03:19,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:19,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:20,485 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 16:03:20,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:20,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701450112] [2024-06-20 16:03:20,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701450112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:20,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:20,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:03:20,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857773896] [2024-06-20 16:03:20,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:20,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:03:20,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:20,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:03:20,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:03:20,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:20,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 188 transitions, 1583 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 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 16:03:20,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:20,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:20,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:22,495 INFO L124 PetriNetUnfolderBase]: 10882/15778 cut-off events. [2024-06-20 16:03:22,496 INFO L125 PetriNetUnfolderBase]: For 446768/446770 co-relation queries the response was YES. [2024-06-20 16:03:22,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98281 conditions, 15778 events. 10882/15778 cut-off events. For 446768/446770 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 91615 event pairs, 4596 based on Foata normal form. 2/15735 useless extension candidates. Maximal degree in co-relation 98232. Up to 14786 conditions per place. [2024-06-20 16:03:22,672 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 193 selfloop transitions, 18 changer transitions 0/218 dead transitions. [2024-06-20 16:03:22,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 218 transitions, 2166 flow [2024-06-20 16:03:22,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:03:22,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:03:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-20 16:03:22,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340659340659341 [2024-06-20 16:03:22,675 INFO L175 Difference]: Start difference. First operand has 119 places, 188 transitions, 1583 flow. Second operand 7 states and 158 transitions. [2024-06-20 16:03:22,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 218 transitions, 2166 flow [2024-06-20 16:03:23,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 218 transitions, 2064 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 16:03:23,057 INFO L231 Difference]: Finished difference. Result has 123 places, 196 transitions, 1634 flow [2024-06-20 16:03:23,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1634, PETRI_PLACES=123, PETRI_TRANSITIONS=196} [2024-06-20 16:03:23,058 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-20 16:03:23,058 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 196 transitions, 1634 flow [2024-06-20 16:03:23,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 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 16:03:23,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:23,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:23,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:03:23,059 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 16:03:23,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:23,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1912941573, now seen corresponding path program 1 times [2024-06-20 16:03:23,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:23,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038625055] [2024-06-20 16:03:23,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:23,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:24,078 INFO 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 16:03:24,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:24,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038625055] [2024-06-20 16:03:24,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038625055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:24,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:24,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:24,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361394194] [2024-06-20 16:03:24,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:24,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:24,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:24,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:24,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:24,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 196 transitions, 1634 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:24,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:24,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:24,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:26,607 INFO L124 PetriNetUnfolderBase]: 12020/16929 cut-off events. [2024-06-20 16:03:26,607 INFO L125 PetriNetUnfolderBase]: For 561654/561665 co-relation queries the response was YES. [2024-06-20 16:03:26,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113149 conditions, 16929 events. 12020/16929 cut-off events. For 561654/561665 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 95345 event pairs, 3657 based on Foata normal form. 28/16921 useless extension candidates. Maximal degree in co-relation 113098. Up to 14445 conditions per place. [2024-06-20 16:03:26,754 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 146 selfloop transitions, 101 changer transitions 0/255 dead transitions. [2024-06-20 16:03:26,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 255 transitions, 2574 flow [2024-06-20 16:03:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-20 16:03:26,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-20 16:03:26,756 INFO L175 Difference]: Start difference. First operand has 123 places, 196 transitions, 1634 flow. Second operand 8 states and 212 transitions. [2024-06-20 16:03:26,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 255 transitions, 2574 flow [2024-06-20 16:03:27,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 255 transitions, 2483 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-20 16:03:27,095 INFO L231 Difference]: Finished difference. Result has 127 places, 200 transitions, 1886 flow [2024-06-20 16:03:27,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1886, PETRI_PLACES=127, PETRI_TRANSITIONS=200} [2024-06-20 16:03:27,098 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-20 16:03:27,098 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 200 transitions, 1886 flow [2024-06-20 16:03:27,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:27,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:27,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:27,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:03:27,098 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 16:03:27,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1605586947, now seen corresponding path program 2 times [2024-06-20 16:03:27,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:27,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327165571] [2024-06-20 16:03:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:27,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:28,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:28,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327165571] [2024-06-20 16:03:28,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327165571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:28,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:28,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:28,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912768841] [2024-06-20 16:03:28,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:28,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:28,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:28,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:28,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:28,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 200 transitions, 1886 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:28,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:28,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:28,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:30,851 INFO L124 PetriNetUnfolderBase]: 12164/17153 cut-off events. [2024-06-20 16:03:30,851 INFO L125 PetriNetUnfolderBase]: For 606996/607007 co-relation queries the response was YES. [2024-06-20 16:03:30,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117467 conditions, 17153 events. 12164/17153 cut-off events. For 606996/607007 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 96931 event pairs, 4612 based on Foata normal form. 28/17159 useless extension candidates. Maximal degree in co-relation 117415. Up to 15313 conditions per place. [2024-06-20 16:03:31,022 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 149 selfloop transitions, 99 changer transitions 0/256 dead transitions. [2024-06-20 16:03:31,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 256 transitions, 2624 flow [2024-06-20 16:03:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 16:03:31,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072115384615384 [2024-06-20 16:03:31,024 INFO L175 Difference]: Start difference. First operand has 127 places, 200 transitions, 1886 flow. Second operand 8 states and 211 transitions. [2024-06-20 16:03:31,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 256 transitions, 2624 flow [2024-06-20 16:03:31,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 256 transitions, 2481 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:03:31,467 INFO L231 Difference]: Finished difference. Result has 131 places, 202 transitions, 2022 flow [2024-06-20 16:03:31,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2022, PETRI_PLACES=131, PETRI_TRANSITIONS=202} [2024-06-20 16:03:31,472 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 76 predicate places. [2024-06-20 16:03:31,472 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 202 transitions, 2022 flow [2024-06-20 16:03:31,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:31,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:31,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:31,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:03:31,473 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 16:03:31,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:31,473 INFO L85 PathProgramCache]: Analyzing trace with hash 2145720484, now seen corresponding path program 1 times [2024-06-20 16:03:31,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:31,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621381823] [2024-06-20 16:03:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:31,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:32,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621381823] [2024-06-20 16:03:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621381823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:32,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:03:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943259853] [2024-06-20 16:03:32,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:32,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:03:32,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:32,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:03:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:03:32,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:32,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 202 transitions, 2022 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 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 16:03:32,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:32,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:32,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:35,034 INFO L124 PetriNetUnfolderBase]: 12196/17207 cut-off events. [2024-06-20 16:03:35,034 INFO L125 PetriNetUnfolderBase]: For 636128/636156 co-relation queries the response was YES. [2024-06-20 16:03:35,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119387 conditions, 17207 events. 12196/17207 cut-off events. For 636128/636156 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 97494 event pairs, 4955 based on Foata normal form. 30/17231 useless extension candidates. Maximal degree in co-relation 119333. Up to 16349 conditions per place. [2024-06-20 16:03:35,178 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 189 selfloop transitions, 47 changer transitions 0/244 dead transitions. [2024-06-20 16:03:35,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 244 transitions, 2712 flow [2024-06-20 16:03:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:03:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:03:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 16:03:35,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 16:03:35,179 INFO L175 Difference]: Start difference. First operand has 131 places, 202 transitions, 2022 flow. Second operand 7 states and 175 transitions. [2024-06-20 16:03:35,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 244 transitions, 2712 flow [2024-06-20 16:03:35,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 244 transitions, 2465 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:35,647 INFO L231 Difference]: Finished difference. Result has 132 places, 207 transitions, 1978 flow [2024-06-20 16:03:35,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1775, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1978, PETRI_PLACES=132, PETRI_TRANSITIONS=207} [2024-06-20 16:03:35,647 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 77 predicate places. [2024-06-20 16:03:35,648 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 207 transitions, 1978 flow [2024-06-20 16:03:35,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 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 16:03:35,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:35,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:35,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:03:35,648 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:03:35,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2055131133, now seen corresponding path program 3 times [2024-06-20 16:03:35,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:35,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393666122] [2024-06-20 16:03:35,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:35,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:37,007 INFO 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 16:03:37,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:37,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393666122] [2024-06-20 16:03:37,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393666122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:37,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:37,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:37,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223205255] [2024-06-20 16:03:37,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:37,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:37,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:37,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:37,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 207 transitions, 1978 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:37,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:37,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:37,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:40,503 INFO L124 PetriNetUnfolderBase]: 12455/17632 cut-off events. [2024-06-20 16:03:40,503 INFO L125 PetriNetUnfolderBase]: For 700761/700788 co-relation queries the response was YES. [2024-06-20 16:03:40,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125916 conditions, 17632 events. 12455/17632 cut-off events. For 700761/700788 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 100551 event pairs, 4009 based on Foata normal form. 46/17670 useless extension candidates. Maximal degree in co-relation 125861. Up to 15602 conditions per place. [2024-06-20 16:03:40,668 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 162 selfloop transitions, 101 changer transitions 0/271 dead transitions. [2024-06-20 16:03:40,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 271 transitions, 3008 flow [2024-06-20 16:03:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-20 16:03:40,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216346153846154 [2024-06-20 16:03:40,670 INFO L175 Difference]: Start difference. First operand has 132 places, 207 transitions, 1978 flow. Second operand 8 states and 217 transitions. [2024-06-20 16:03:40,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 271 transitions, 3008 flow [2024-06-20 16:03:41,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 271 transitions, 2843 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 16:03:41,112 INFO L231 Difference]: Finished difference. Result has 135 places, 211 transitions, 2172 flow [2024-06-20 16:03:41,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1813, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2172, PETRI_PLACES=135, PETRI_TRANSITIONS=211} [2024-06-20 16:03:41,113 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-20 16:03:41,113 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 211 transitions, 2172 flow [2024-06-20 16:03:41,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:41,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:41,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:41,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:03:41,113 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:03:41,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash 57338587, now seen corresponding path program 4 times [2024-06-20 16:03:41,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:41,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864947453] [2024-06-20 16:03:41,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:41,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:42,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:42,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864947453] [2024-06-20 16:03:42,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864947453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:42,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:42,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:42,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403334085] [2024-06-20 16:03:42,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:42,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:42,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:42,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:42,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:42,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 211 transitions, 2172 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:42,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:42,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:42,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:45,243 INFO L124 PetriNetUnfolderBase]: 12619/17852 cut-off events. [2024-06-20 16:03:45,243 INFO L125 PetriNetUnfolderBase]: For 751186/751209 co-relation queries the response was YES. [2024-06-20 16:03:45,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129502 conditions, 17852 events. 12619/17852 cut-off events. For 751186/751209 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 101746 event pairs, 4687 based on Foata normal form. 46/17890 useless extension candidates. Maximal degree in co-relation 129446. Up to 16246 conditions per place. [2024-06-20 16:03:45,393 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 166 selfloop transitions, 92 changer transitions 0/266 dead transitions. [2024-06-20 16:03:45,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 266 transitions, 2942 flow [2024-06-20 16:03:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 16:03:45,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-20 16:03:45,397 INFO L175 Difference]: Start difference. First operand has 135 places, 211 transitions, 2172 flow. Second operand 8 states and 207 transitions. [2024-06-20 16:03:45,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 266 transitions, 2942 flow [2024-06-20 16:03:45,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 266 transitions, 2779 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 16:03:45,934 INFO L231 Difference]: Finished difference. Result has 139 places, 213 transitions, 2285 flow [2024-06-20 16:03:45,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2285, PETRI_PLACES=139, PETRI_TRANSITIONS=213} [2024-06-20 16:03:45,935 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-20 16:03:45,935 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 213 transitions, 2285 flow [2024-06-20 16:03:45,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:45,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:45,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:45,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:03:45,935 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:03:45,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:45,936 INFO L85 PathProgramCache]: Analyzing trace with hash 51976207, now seen corresponding path program 5 times [2024-06-20 16:03:45,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:45,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661149566] [2024-06-20 16:03:45,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:45,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:47,080 INFO 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 16:03:47,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:47,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661149566] [2024-06-20 16:03:47,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661149566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:47,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:47,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:03:47,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99800662] [2024-06-20 16:03:47,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:47,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:03:47,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:47,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:03:47,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:03:47,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:47,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 213 transitions, 2285 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:47,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:47,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:47,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:50,148 INFO L124 PetriNetUnfolderBase]: 12783/18120 cut-off events. [2024-06-20 16:03:50,149 INFO L125 PetriNetUnfolderBase]: For 793126/793153 co-relation queries the response was YES. [2024-06-20 16:03:50,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132738 conditions, 18120 events. 12783/18120 cut-off events. For 793126/793153 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 103778 event pairs, 4731 based on Foata normal form. 52/18164 useless extension candidates. Maximal degree in co-relation 132680. Up to 16490 conditions per place. [2024-06-20 16:03:50,510 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 167 selfloop transitions, 96 changer transitions 0/271 dead transitions. [2024-06-20 16:03:50,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 271 transitions, 3081 flow [2024-06-20 16:03:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 16:03:50,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072115384615384 [2024-06-20 16:03:50,512 INFO L175 Difference]: Start difference. First operand has 139 places, 213 transitions, 2285 flow. Second operand 8 states and 211 transitions. [2024-06-20 16:03:50,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 271 transitions, 3081 flow [2024-06-20 16:03:51,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 271 transitions, 2851 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:51,120 INFO L231 Difference]: Finished difference. Result has 141 places, 215 transitions, 2343 flow [2024-06-20 16:03:51,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2055, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2343, PETRI_PLACES=141, PETRI_TRANSITIONS=215} [2024-06-20 16:03:51,121 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-20 16:03:51,121 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 215 transitions, 2343 flow [2024-06-20 16:03:51,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:03:51,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:51,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:51,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:03:51,122 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:03:51,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:51,122 INFO L85 PathProgramCache]: Analyzing trace with hash 57553789, now seen corresponding path program 1 times [2024-06-20 16:03:51,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:51,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528312287] [2024-06-20 16:03:51,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:51,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:52,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:52,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528312287] [2024-06-20 16:03:52,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528312287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:52,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:52,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:03:52,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397671348] [2024-06-20 16:03:52,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:52,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:03:52,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:03:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:03:52,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:52,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 215 transitions, 2343 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 16:03:52,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:52,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:52,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:03:55,361 INFO L124 PetriNetUnfolderBase]: 12875/18224 cut-off events. [2024-06-20 16:03:55,362 INFO L125 PetriNetUnfolderBase]: For 826021/826044 co-relation queries the response was YES. [2024-06-20 16:03:55,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134369 conditions, 18224 events. 12875/18224 cut-off events. For 826021/826044 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 104404 event pairs, 4705 based on Foata normal form. 34/18236 useless extension candidates. Maximal degree in co-relation 134310. Up to 15958 conditions per place. [2024-06-20 16:03:55,545 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 163 selfloop transitions, 99 changer transitions 0/270 dead transitions. [2024-06-20 16:03:55,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 270 transitions, 3119 flow [2024-06-20 16:03:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:03:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:03:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 16:03:55,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-20 16:03:55,547 INFO L175 Difference]: Start difference. First operand has 141 places, 215 transitions, 2343 flow. Second operand 8 states and 208 transitions. [2024-06-20 16:03:55,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 270 transitions, 3119 flow [2024-06-20 16:03:56,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 270 transitions, 2877 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-20 16:03:56,439 INFO L231 Difference]: Finished difference. Result has 143 places, 217 transitions, 2389 flow [2024-06-20 16:03:56,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2101, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2389, PETRI_PLACES=143, PETRI_TRANSITIONS=217} [2024-06-20 16:03:56,439 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-06-20 16:03:56,439 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 217 transitions, 2389 flow [2024-06-20 16:03:56,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states 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 16:03:56,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:03:56,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:03:56,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:03:56,440 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 16:03:56,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:03:56,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2146019014, now seen corresponding path program 2 times [2024-06-20 16:03:56,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:03:56,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48733563] [2024-06-20 16:03:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:03:56,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:03:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:03:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:03:57,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:03:57,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48733563] [2024-06-20 16:03:57,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48733563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:03:57,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:03:57,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:03:57,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038384323] [2024-06-20 16:03:57,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:03:57,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:03:57,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:03:57,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:03:57,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:03:57,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:03:57,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 217 transitions, 2389 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 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 16:03:57,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:03:57,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:03:57,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:00,439 INFO L124 PetriNetUnfolderBase]: 13076/18545 cut-off events. [2024-06-20 16:04:00,439 INFO L125 PetriNetUnfolderBase]: For 857617/857637 co-relation queries the response was YES. [2024-06-20 16:04:00,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137577 conditions, 18545 events. 13076/18545 cut-off events. For 857617/857637 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 106979 event pairs, 5097 based on Foata normal form. 20/18559 useless extension candidates. Maximal degree in co-relation 137517. Up to 17542 conditions per place. [2024-06-20 16:04:00,602 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 197 selfloop transitions, 53 changer transitions 0/258 dead transitions. [2024-06-20 16:04:00,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 258 transitions, 3321 flow [2024-06-20 16:04:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:00,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:00,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 16:04:00,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-20 16:04:00,603 INFO L175 Difference]: Start difference. First operand has 143 places, 217 transitions, 2389 flow. Second operand 7 states and 172 transitions. [2024-06-20 16:04:00,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 258 transitions, 3321 flow [2024-06-20 16:04:01,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 258 transitions, 3067 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:01,306 INFO L231 Difference]: Finished difference. Result has 145 places, 227 transitions, 2482 flow [2024-06-20 16:04:01,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2482, PETRI_PLACES=145, PETRI_TRANSITIONS=227} [2024-06-20 16:04:01,306 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-20 16:04:01,306 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 227 transitions, 2482 flow [2024-06-20 16:04:01,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 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 16:04:01,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:01,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:01,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:04:01,307 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:04:01,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:01,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1195464609, now seen corresponding path program 6 times [2024-06-20 16:04:01,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:01,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211436370] [2024-06-20 16:04:01,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:01,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:02,440 INFO 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 16:04:02,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:02,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211436370] [2024-06-20 16:04:02,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211436370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:02,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:02,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:02,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533334225] [2024-06-20 16:04:02,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:02,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:02,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:02,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:02,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:02,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:04:02,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 227 transitions, 2482 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:02,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:02,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:04:02,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand