./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe000_power.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe000_power.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe000_power.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe000_power.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:48:50,586 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:48:50,619 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:48:50,622 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:48:50,622 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:48:50,635 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:48:50,636 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:48:50,636 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:48:50,636 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:48:50,637 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:48:50,637 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:48:50,637 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:48:50,638 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:48:50,638 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:48:50,638 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:48:50,639 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:48:50,639 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:48:50,639 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:48:50,640 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:48:50,640 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:48:50,640 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:48:50,641 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:48:50,641 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:48:50,641 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:48:50,641 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:48:50,642 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:48:50,642 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:48:50,642 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:48:50,643 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:48:50,643 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:48:50,643 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:48:50,643 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:48:50,644 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:48:50,644 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:48:50,644 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:48:50,645 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:48:50,645 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:48:50,645 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:48:50,646 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:48:50,646 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:48:50,646 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:48:50,646 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:48:50,647 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:48:50,647 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:48:50,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:48:50,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:48:50,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:48:50,899 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:48:50,899 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:48:50,900 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_power.opt.i [2024-06-14 12:48:51,965 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:48:52,208 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:48:52,209 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_power.opt.i [2024-06-14 12:48:52,230 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7302a473/6b20cccad5b249e89b8cf0d4b13eeb5e/FLAG459438e92 [2024-06-14 12:48:52,561 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7302a473/6b20cccad5b249e89b8cf0d4b13eeb5e [2024-06-14 12:48:52,563 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:48:52,565 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:48:52,565 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe000_power.opt.yml/witness.yml [2024-06-14 12:48:52,773 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:48:52,774 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:48:52,775 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:48:52,775 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:48:52,778 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:48:52,779 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:48:52" (1/2) ... [2024-06-14 12:48:52,781 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fdd6281 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:48:52, skipping insertion in model container [2024-06-14 12:48:52,781 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:48:52" (1/2) ... [2024-06-14 12:48:52,782 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@23f017f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:48:52, skipping insertion in model container [2024-06-14 12:48:52,783 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:48:52" (2/2) ... [2024-06-14 12:48:52,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fdd6281 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:52, skipping insertion in model container [2024-06-14 12:48:52,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:48:52" (2/2) ... [2024-06-14 12:48:52,783 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:48:52,903 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:48:52,904 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] ((((((((((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 12:48:52,905 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 12:48:52,905 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || __unbuffered_p1_EAX$mem_tmp == 0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p1_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p1_EAX$read_delayed_var && *__unbuffered_p1_EAX$read_delayed_var <= 1) && __unbuffered_p1_EAX$read_delayed_var == & x) && (*__unbuffered_p1_EAX$read_delayed_var == 0 || *__unbuffered_p1_EAX$read_delayed_var == 1))))) && (! multithreaded || __unbuffered_p1_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || __unbuffered_p1_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p1_EAX$w_buff0 == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-14 12:48:52,905 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:48:52,905 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-14 12:48:52,942 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:48:53,254 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:48:53,263 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:48:53,421 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:48:53,458 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:48:53,458 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53 WrapperNode [2024-06-14 12:48:53,459 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:48:53,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:48:53,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:48:53,460 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:48:53,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,479 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,525 INFO L138 Inliner]: procedures = 175, calls = 86, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 254 [2024-06-14 12:48:53,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:48:53,537 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:48:53,538 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:48:53,538 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:48:53,547 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,557 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,640 INFO L175 MemorySlicer]: Split 44 memory accesses to 2 slices as follows [2, 42]. 95 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 6 writes are split as follows [0, 6]. [2024-06-14 12:48:53,642 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,643 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,666 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,669 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:48:53,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:48:53,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:48:53,679 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:48:53,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (1/1) ... [2024-06-14 12:48:53,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:48:53,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:48:53,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:48:53,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:48:53,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 12:48:53,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 12:48:53,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 12:48:53,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 12:48:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:48:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:48:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:48:53,747 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:48:53,747 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:48:53,747 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:48:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:48:53,748 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:48:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:48:53,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 12:48:53,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:48:53,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:48:53,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:48:53,752 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:48:53,891 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:48:53,893 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:48:54,424 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:48:54,425 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:48:54,843 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:48:54,843 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:48:54,844 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:48:54 BoogieIcfgContainer [2024-06-14 12:48:54,844 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:48:54,847 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:48:54,847 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:48:54,849 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:48:54,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:48:52" (1/4) ... [2024-06-14 12:48:54,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82e7a79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:48:54, skipping insertion in model container [2024-06-14 12:48:54,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:48:52" (2/4) ... [2024-06-14 12:48:54,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82e7a79 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:48:54, skipping insertion in model container [2024-06-14 12:48:54,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:48:53" (3/4) ... [2024-06-14 12:48:54,851 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@82e7a79 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:48:54, skipping insertion in model container [2024-06-14 12:48:54,851 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:48:54" (4/4) ... [2024-06-14 12:48:54,852 INFO L112 eAbstractionObserver]: Analyzing ICFG safe000_power.opt.i [2024-06-14 12:48:54,865 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:48:54,866 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:48:54,866 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:48:54,933 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:48:54,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:48:55,019 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-14 12:48:55,020 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:48:55,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:48:55,022 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-14 12:48:55,026 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-14 12:48:55,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:48:55,049 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;@4975dccd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:48:55,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:48:55,056 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:48:55,056 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:48:55,057 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:48:55,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:55,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:48:55,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:55,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:55,064 INFO L85 PathProgramCache]: Analyzing trace with hash 521693137, now seen corresponding path program 1 times [2024-06-14 12:48:55,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532227057] [2024-06-14 12:48:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:55,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:57,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:57,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532227057] [2024-06-14 12:48:57,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532227057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:57,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:57,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:48:57,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613410137] [2024-06-14 12:48:57,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:57,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:48:57,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:57,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:48:57,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:48:57,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:48:57,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:57,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:57,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:48:57,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:48:58,014 INFO L124 PetriNetUnfolderBase]: 1205/1835 cut-off events. [2024-06-14 12:48:58,014 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-14 12:48:58,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3742 conditions, 1835 events. 1205/1835 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8420 event pairs, 800 based on Foata normal form. 1/1800 useless extension candidates. Maximal degree in co-relation 3727. Up to 1818 conditions per place. [2024-06-14 12:48:58,028 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 37 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-14 12:48:58,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 189 flow [2024-06-14 12:48:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:48:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:48:58,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-14 12:48:58,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2024-06-14 12:48:58,039 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 68 transitions. [2024-06-14 12:48:58,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 189 flow [2024-06-14 12:48:58,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 46 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:48:58,045 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-14 12:48:58,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-14 12:48:58,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-14 12:48:58,049 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-14 12:48:58,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:58,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:48:58,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:48:58,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:48:58,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:48:58,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:48:58,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1725301569, now seen corresponding path program 1 times [2024-06-14 12:48:58,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:48:58,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154043124] [2024-06-14 12:48:58,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:48:58,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:48:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:48:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:48:59,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:48:59,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154043124] [2024-06-14 12:48:59,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154043124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:48:59,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:48:59,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:48:59,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697176226] [2024-06-14 12:48:59,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:48:59,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:48:59,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:48:59,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:48:59,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:48:59,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:48:59,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:48:59,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:48:59,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:48:59,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:00,136 INFO L124 PetriNetUnfolderBase]: 1460/2211 cut-off events. [2024-06-14 12:49:00,137 INFO L125 PetriNetUnfolderBase]: For 406/429 co-relation queries the response was YES. [2024-06-14 12:49:00,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5086 conditions, 2211 events. 1460/2211 cut-off events. For 406/429 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10101 event pairs, 758 based on Foata normal form. 10/2216 useless extension candidates. Maximal degree in co-relation 5071. Up to 2154 conditions per place. [2024-06-14 12:49:00,157 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 48 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-14 12:49:00,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 59 transitions, 270 flow [2024-06-14 12:49:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:49:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:49:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-06-14 12:49:00,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:49:00,159 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 86 transitions. [2024-06-14 12:49:00,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 59 transitions, 270 flow [2024-06-14 12:49:00,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 59 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:49:00,161 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-14 12:49:00,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-14 12:49:00,162 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-14 12:49:00,162 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-14 12:49:00,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:00,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:00,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:00,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:49:00,164 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:00,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:00,165 INFO L85 PathProgramCache]: Analyzing trace with hash -828471119, now seen corresponding path program 1 times [2024-06-14 12:49:00,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:00,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625822315] [2024-06-14 12:49:00,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:00,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:01,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:01,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625822315] [2024-06-14 12:49:01,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625822315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:01,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:01,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:49:01,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555946503] [2024-06-14 12:49:01,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:01,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:49:01,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:49:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:49:01,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:49:01,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:01,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:01,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:49:01,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:02,409 INFO L124 PetriNetUnfolderBase]: 1454/2202 cut-off events. [2024-06-14 12:49:02,410 INFO L125 PetriNetUnfolderBase]: For 1156/1207 co-relation queries the response was YES. [2024-06-14 12:49:02,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5614 conditions, 2202 events. 1454/2202 cut-off events. For 1156/1207 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 10012 event pairs, 628 based on Foata normal form. 17/2215 useless extension candidates. Maximal degree in co-relation 5597. Up to 2126 conditions per place. [2024-06-14 12:49:02,419 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 57 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-06-14 12:49:02,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 71 transitions, 356 flow [2024-06-14 12:49:02,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:49:02,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:49:02,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-14 12:49:02,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-14 12:49:02,421 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 5 states and 105 transitions. [2024-06-14 12:49:02,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 71 transitions, 356 flow [2024-06-14 12:49:02,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 71 transitions, 342 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:49:02,423 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 176 flow [2024-06-14 12:49:02,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-14 12:49:02,424 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-06-14 12:49:02,424 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 176 flow [2024-06-14 12:49:02,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:02,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:02,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:02,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:49:02,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:02,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:02,426 INFO L85 PathProgramCache]: Analyzing trace with hash 87200316, now seen corresponding path program 1 times [2024-06-14 12:49:02,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:02,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195227545] [2024-06-14 12:49:02,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:02,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:04,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:04,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195227545] [2024-06-14 12:49:04,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195227545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:04,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:04,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:49:04,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191191146] [2024-06-14 12:49:04,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:04,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:49:04,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:04,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:49:04,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:49:04,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:49:04,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:04,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:04,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:49:04,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:04,909 INFO L124 PetriNetUnfolderBase]: 1445/2187 cut-off events. [2024-06-14 12:49:04,909 INFO L125 PetriNetUnfolderBase]: For 2103/2164 co-relation queries the response was YES. [2024-06-14 12:49:04,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6093 conditions, 2187 events. 1445/2187 cut-off events. For 2103/2164 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9994 event pairs, 483 based on Foata normal form. 24/2207 useless extension candidates. Maximal degree in co-relation 6075. Up to 2073 conditions per place. [2024-06-14 12:49:04,921 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 62 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-14 12:49:04,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 414 flow [2024-06-14 12:49:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:49:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:49:04,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-14 12:49:04,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46124031007751937 [2024-06-14 12:49:04,923 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 176 flow. Second operand 6 states and 119 transitions. [2024-06-14 12:49:04,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 414 flow [2024-06-14 12:49:04,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 390 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:49:04,926 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 195 flow [2024-06-14 12:49:04,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-14 12:49:04,927 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-06-14 12:49:04,927 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 195 flow [2024-06-14 12:49:04,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:04,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:04,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:04,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:49:04,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:04,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:04,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1236374681, now seen corresponding path program 1 times [2024-06-14 12:49:04,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:04,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485827186] [2024-06-14 12:49:04,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:04,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:06,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:06,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485827186] [2024-06-14 12:49:06,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485827186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:06,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:06,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:49:06,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133091078] [2024-06-14 12:49:06,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:06,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:49:06,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:06,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:49:06,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:49:06,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-06-14 12:49:06,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:06,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:06,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-06-14 12:49:06,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:07,445 INFO L124 PetriNetUnfolderBase]: 1179/1795 cut-off events. [2024-06-14 12:49:07,446 INFO L125 PetriNetUnfolderBase]: For 2644/2647 co-relation queries the response was YES. [2024-06-14 12:49:07,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5416 conditions, 1795 events. 1179/1795 cut-off events. For 2644/2647 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8122 event pairs, 492 based on Foata normal form. 4/1796 useless extension candidates. Maximal degree in co-relation 5397. Up to 1767 conditions per place. [2024-06-14 12:49:07,457 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 48 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-14 12:49:07,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 61 transitions, 357 flow [2024-06-14 12:49:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:49:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:49:07,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 12:49:07,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:49:07,463 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 195 flow. Second operand 5 states and 90 transitions. [2024-06-14 12:49:07,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 61 transitions, 357 flow [2024-06-14 12:49:07,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 324 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:49:07,472 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 208 flow [2024-06-14 12:49:07,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=208, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-14 12:49:07,474 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-14 12:49:07,474 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 208 flow [2024-06-14 12:49:07,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:07,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:07,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:07,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:49:07,475 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:07,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:07,475 INFO L85 PathProgramCache]: Analyzing trace with hash -347644240, now seen corresponding path program 1 times [2024-06-14 12:49:07,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:07,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867196407] [2024-06-14 12:49:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:07,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:09,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:09,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:09,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867196407] [2024-06-14 12:49:09,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867196407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:09,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:09,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:49:09,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862505025] [2024-06-14 12:49:09,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:09,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:49:09,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:09,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:49:09,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:49:09,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:49:09,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 208 flow. Second operand has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:09,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:09,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:49:09,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:10,648 INFO L124 PetriNetUnfolderBase]: 1654/2484 cut-off events. [2024-06-14 12:49:10,649 INFO L125 PetriNetUnfolderBase]: For 4656/4656 co-relation queries the response was YES. [2024-06-14 12:49:10,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7736 conditions, 2484 events. 1654/2484 cut-off events. For 4656/4656 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11184 event pairs, 649 based on Foata normal form. 4/2486 useless extension candidates. Maximal degree in co-relation 7715. Up to 2436 conditions per place. [2024-06-14 12:49:10,660 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 62 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-14 12:49:10,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 76 transitions, 428 flow [2024-06-14 12:49:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:49:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:49:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 12:49:10,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375968992248062 [2024-06-14 12:49:10,663 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 208 flow. Second operand 6 states and 97 transitions. [2024-06-14 12:49:10,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 76 transitions, 428 flow [2024-06-14 12:49:10,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 76 transitions, 404 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 12:49:10,667 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 258 flow [2024-06-14 12:49:10,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-14 12:49:10,670 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-14 12:49:10,670 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 258 flow [2024-06-14 12:49:10,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.714285714285714) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:10,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:10,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:49:10,671 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:10,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:10,671 INFO L85 PathProgramCache]: Analyzing trace with hash 743905013, now seen corresponding path program 1 times [2024-06-14 12:49:10,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:10,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197157970] [2024-06-14 12:49:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:10,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:13,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:13,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197157970] [2024-06-14 12:49:13,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197157970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:13,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:13,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:49:13,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311625127] [2024-06-14 12:49:13,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:13,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:49:13,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:13,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:49:13,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:49:13,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:49:13,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 258 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:13,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:13,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:49:13,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:14,187 INFO L124 PetriNetUnfolderBase]: 1633/2461 cut-off events. [2024-06-14 12:49:14,187 INFO L125 PetriNetUnfolderBase]: For 6766/6842 co-relation queries the response was YES. [2024-06-14 12:49:14,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8554 conditions, 2461 events. 1633/2461 cut-off events. For 6766/6842 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 11256 event pairs, 588 based on Foata normal form. 19/2455 useless extension candidates. Maximal degree in co-relation 8530. Up to 2332 conditions per place. [2024-06-14 12:49:14,207 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 64 selfloop transitions, 17 changer transitions 0/88 dead transitions. [2024-06-14 12:49:14,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 88 transitions, 548 flow [2024-06-14 12:49:14,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:49:14,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:49:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 12:49:14,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4263565891472868 [2024-06-14 12:49:14,209 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 258 flow. Second operand 6 states and 110 transitions. [2024-06-14 12:49:14,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 88 transitions, 548 flow [2024-06-14 12:49:14,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 88 transitions, 546 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:49:14,213 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 344 flow [2024-06-14 12:49:14,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=344, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-14 12:49:14,214 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 19 predicate places. [2024-06-14 12:49:14,214 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 344 flow [2024-06-14 12:49:14,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:14,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:14,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:14,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:49:14,215 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:14,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:14,215 INFO L85 PathProgramCache]: Analyzing trace with hash 304784141, now seen corresponding path program 1 times [2024-06-14 12:49:14,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:14,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042287673] [2024-06-14 12:49:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:14,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:16,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042287673] [2024-06-14 12:49:16,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042287673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:16,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:16,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:49:16,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891514373] [2024-06-14 12:49:16,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:16,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:49:16,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:49:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:49:16,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:49:16,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2024-06-14 12:49:16,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:16,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:49:16,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:17,713 INFO L124 PetriNetUnfolderBase]: 1870/2790 cut-off events. [2024-06-14 12:49:17,713 INFO L125 PetriNetUnfolderBase]: For 8904/8908 co-relation queries the response was YES. [2024-06-14 12:49:17,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9985 conditions, 2790 events. 1870/2790 cut-off events. For 8904/8908 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12799 event pairs, 529 based on Foata normal form. 20/2807 useless extension candidates. Maximal degree in co-relation 9958. Up to 2510 conditions per place. [2024-06-14 12:49:17,726 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 78 selfloop transitions, 28 changer transitions 0/109 dead transitions. [2024-06-14 12:49:17,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 109 transitions, 742 flow [2024-06-14 12:49:17,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:17,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:17,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 12:49:17,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3866279069767442 [2024-06-14 12:49:17,728 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 344 flow. Second operand 8 states and 133 transitions. [2024-06-14 12:49:17,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 109 transitions, 742 flow [2024-06-14 12:49:17,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 109 transitions, 719 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-14 12:49:17,734 INFO L231 Difference]: Finished difference. Result has 71 places, 77 transitions, 504 flow [2024-06-14 12:49:17,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=504, PETRI_PLACES=71, PETRI_TRANSITIONS=77} [2024-06-14 12:49:17,735 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 27 predicate places. [2024-06-14 12:49:17,735 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 77 transitions, 504 flow [2024-06-14 12:49:17,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2024-06-14 12:49:17,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:17,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:17,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:49:17,736 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:17,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash 304092035, now seen corresponding path program 2 times [2024-06-14 12:49:17,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:17,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212582846] [2024-06-14 12:49:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:17,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:17,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:19,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:19,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212582846] [2024-06-14 12:49:19,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212582846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:19,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:19,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:49:19,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657826757] [2024-06-14 12:49:19,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:19,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:49:19,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:19,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:49:19,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:49:19,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:49:19,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 77 transitions, 504 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:19,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:19,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:49:19,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:20,509 INFO L124 PetriNetUnfolderBase]: 1819/2726 cut-off events. [2024-06-14 12:49:20,509 INFO L125 PetriNetUnfolderBase]: For 14974/15104 co-relation queries the response was YES. [2024-06-14 12:49:20,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11755 conditions, 2726 events. 1819/2726 cut-off events. For 14974/15104 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 12627 event pairs, 614 based on Foata normal form. 26/2708 useless extension candidates. Maximal degree in co-relation 11724. Up to 2599 conditions per place. [2024-06-14 12:49:20,555 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 77 selfloop transitions, 13 changer transitions 0/98 dead transitions. [2024-06-14 12:49:20,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 98 transitions, 750 flow [2024-06-14 12:49:20,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:49:20,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:49:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 12:49:20,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3992248062015504 [2024-06-14 12:49:20,557 INFO L175 Difference]: Start difference. First operand has 71 places, 77 transitions, 504 flow. Second operand 6 states and 103 transitions. [2024-06-14 12:49:20,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 98 transitions, 750 flow [2024-06-14 12:49:20,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 705 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 12:49:20,569 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 493 flow [2024-06-14 12:49:20,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=493, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-14 12:49:20,570 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-14 12:49:20,570 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 493 flow [2024-06-14 12:49:20,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:20,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:20,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:20,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:49:20,570 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:20,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:20,571 INFO L85 PathProgramCache]: Analyzing trace with hash -799559091, now seen corresponding path program 2 times [2024-06-14 12:49:20,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:20,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468977794] [2024-06-14 12:49:20,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:20,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:22,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:22,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:22,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468977794] [2024-06-14 12:49:22,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468977794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:22,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:22,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:49:22,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525467025] [2024-06-14 12:49:22,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:22,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:49:22,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:22,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:49:22,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:49:22,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:49:22,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 493 flow. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2024-06-14 12:49:22,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:22,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:49:22,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:23,909 INFO L124 PetriNetUnfolderBase]: 1852/2765 cut-off events. [2024-06-14 12:49:23,909 INFO L125 PetriNetUnfolderBase]: For 13455/13459 co-relation queries the response was YES. [2024-06-14 12:49:23,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11670 conditions, 2765 events. 1852/2765 cut-off events. For 13455/13459 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 12487 event pairs, 637 based on Foata normal form. 8/2770 useless extension candidates. Maximal degree in co-relation 11637. Up to 2629 conditions per place. [2024-06-14 12:49:23,926 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 90 selfloop transitions, 21 changer transitions 0/114 dead transitions. [2024-06-14 12:49:23,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 861 flow [2024-06-14 12:49:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:49:23,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:49:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 12:49:23,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38205980066445183 [2024-06-14 12:49:23,942 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 493 flow. Second operand 7 states and 115 transitions. [2024-06-14 12:49:23,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 861 flow [2024-06-14 12:49:23,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 114 transitions, 818 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 12:49:23,956 INFO L231 Difference]: Finished difference. Result has 79 places, 88 transitions, 623 flow [2024-06-14 12:49:23,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=623, PETRI_PLACES=79, PETRI_TRANSITIONS=88} [2024-06-14 12:49:23,956 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 35 predicate places. [2024-06-14 12:49:23,956 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 88 transitions, 623 flow [2024-06-14 12:49:23,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 8 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) [2024-06-14 12:49:23,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:23,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:23,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:49:23,957 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:23,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash -799319523, now seen corresponding path program 1 times [2024-06-14 12:49:23,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:23,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398485440] [2024-06-14 12:49:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:23,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:26,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:26,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398485440] [2024-06-14 12:49:26,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398485440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:26,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:26,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:49:26,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667817198] [2024-06-14 12:49:26,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:26,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:49:26,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:26,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:49:26,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:49:26,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:49:26,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 88 transitions, 623 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:26,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:26,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:49:26,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:27,623 INFO L124 PetriNetUnfolderBase]: 1844/2751 cut-off events. [2024-06-14 12:49:27,624 INFO L125 PetriNetUnfolderBase]: For 16333/16333 co-relation queries the response was YES. [2024-06-14 12:49:27,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12290 conditions, 2751 events. 1844/2751 cut-off events. For 16333/16333 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12411 event pairs, 624 based on Foata normal form. 4/2753 useless extension candidates. Maximal degree in co-relation 12253. Up to 2681 conditions per place. [2024-06-14 12:49:27,638 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 100 selfloop transitions, 13 changer transitions 0/116 dead transitions. [2024-06-14 12:49:27,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 116 transitions, 929 flow [2024-06-14 12:49:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:49:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:49:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 12:49:27,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687707641196013 [2024-06-14 12:49:27,640 INFO L175 Difference]: Start difference. First operand has 79 places, 88 transitions, 623 flow. Second operand 7 states and 111 transitions. [2024-06-14 12:49:27,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 116 transitions, 929 flow [2024-06-14 12:49:27,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 905 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-14 12:49:27,653 INFO L231 Difference]: Finished difference. Result has 85 places, 90 transitions, 654 flow [2024-06-14 12:49:27,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=654, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2024-06-14 12:49:27,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 41 predicate places. [2024-06-14 12:49:27,654 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 654 flow [2024-06-14 12:49:27,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:27,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:27,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:27,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:49:27,655 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:27,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:27,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2007858071, now seen corresponding path program 1 times [2024-06-14 12:49:27,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:27,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862984229] [2024-06-14 12:49:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:30,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:30,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862984229] [2024-06-14 12:49:30,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862984229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:30,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:30,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:49:30,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558674671] [2024-06-14 12:49:30,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:30,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:49:30,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:30,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:49:30,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:49:30,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:49:30,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 654 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:30,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:30,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:49:30,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:31,020 INFO L124 PetriNetUnfolderBase]: 1789/2685 cut-off events. [2024-06-14 12:49:31,021 INFO L125 PetriNetUnfolderBase]: For 22392/22530 co-relation queries the response was YES. [2024-06-14 12:49:31,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12688 conditions, 2685 events. 1789/2685 cut-off events. For 22392/22530 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 12418 event pairs, 590 based on Foata normal form. 33/2674 useless extension candidates. Maximal degree in co-relation 12648. Up to 2552 conditions per place. [2024-06-14 12:49:31,035 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 97 selfloop transitions, 17 changer transitions 0/126 dead transitions. [2024-06-14 12:49:31,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 1000 flow [2024-06-14 12:49:31,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:49:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:49:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 12:49:31,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152823920265781 [2024-06-14 12:49:31,038 INFO L175 Difference]: Start difference. First operand has 85 places, 90 transitions, 654 flow. Second operand 7 states and 125 transitions. [2024-06-14 12:49:31,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 1000 flow [2024-06-14 12:49:31,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 963 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 12:49:31,052 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 693 flow [2024-06-14 12:49:31,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=693, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-06-14 12:49:31,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-14 12:49:31,053 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 693 flow [2024-06-14 12:49:31,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:31,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:31,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:31,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:49:31,056 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:31,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:31,056 INFO L85 PathProgramCache]: Analyzing trace with hash 195972036, now seen corresponding path program 1 times [2024-06-14 12:49:31,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:31,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381795419] [2024-06-14 12:49:31,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:31,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:31,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:34,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:34,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381795419] [2024-06-14 12:49:34,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381795419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:34,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:34,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:49:34,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149071959] [2024-06-14 12:49:34,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:34,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:49:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:49:34,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:49:34,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:49:34,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 693 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:34,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:34,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:49:34,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:35,483 INFO L124 PetriNetUnfolderBase]: 2000/2973 cut-off events. [2024-06-14 12:49:35,484 INFO L125 PetriNetUnfolderBase]: For 23494/23503 co-relation queries the response was YES. [2024-06-14 12:49:35,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14122 conditions, 2973 events. 2000/2973 cut-off events. For 23494/23503 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 13516 event pairs, 629 based on Foata normal form. 18/2988 useless extension candidates. Maximal degree in co-relation 14081. Up to 2784 conditions per place. [2024-06-14 12:49:35,515 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 122 selfloop transitions, 30 changer transitions 0/155 dead transitions. [2024-06-14 12:49:35,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 155 transitions, 1352 flow [2024-06-14 12:49:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:49:35,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-14 12:49:35,520 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 693 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:49:35,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 155 transitions, 1352 flow [2024-06-14 12:49:35,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 155 transitions, 1296 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:49:35,538 INFO L231 Difference]: Finished difference. Result has 93 places, 115 transitions, 937 flow [2024-06-14 12:49:35,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=937, PETRI_PLACES=93, PETRI_TRANSITIONS=115} [2024-06-14 12:49:35,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 49 predicate places. [2024-06-14 12:49:35,539 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 115 transitions, 937 flow [2024-06-14 12:49:35,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:35,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:35,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:35,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:49:35,540 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:35,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:35,540 INFO L85 PathProgramCache]: Analyzing trace with hash 836776291, now seen corresponding path program 2 times [2024-06-14 12:49:35,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:35,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299736428] [2024-06-14 12:49:35,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:35,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:38,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:38,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299736428] [2024-06-14 12:49:38,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299736428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:38,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:38,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:49:38,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085559188] [2024-06-14 12:49:38,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:38,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:49:38,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:38,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:49:38,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:49:38,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:49:38,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 115 transitions, 937 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:38,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:38,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:49:38,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:39,440 INFO L124 PetriNetUnfolderBase]: 1959/2923 cut-off events. [2024-06-14 12:49:39,440 INFO L125 PetriNetUnfolderBase]: For 32820/32942 co-relation queries the response was YES. [2024-06-14 12:49:39,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15561 conditions, 2923 events. 1959/2923 cut-off events. For 32820/32942 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13519 event pairs, 590 based on Foata normal form. 16/2871 useless extension candidates. Maximal degree in co-relation 15516. Up to 2772 conditions per place. [2024-06-14 12:49:39,455 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 111 selfloop transitions, 21 changer transitions 0/147 dead transitions. [2024-06-14 12:49:39,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 147 transitions, 1319 flow [2024-06-14 12:49:39,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:49:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:49:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-14 12:49:39,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-14 12:49:39,456 INFO L175 Difference]: Start difference. First operand has 93 places, 115 transitions, 937 flow. Second operand 7 states and 121 transitions. [2024-06-14 12:49:39,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 147 transitions, 1319 flow [2024-06-14 12:49:39,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 147 transitions, 1256 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 12:49:39,480 INFO L231 Difference]: Finished difference. Result has 98 places, 118 transitions, 969 flow [2024-06-14 12:49:39,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=969, PETRI_PLACES=98, PETRI_TRANSITIONS=118} [2024-06-14 12:49:39,481 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-14 12:49:39,481 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 118 transitions, 969 flow [2024-06-14 12:49:39,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:39,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:39,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:39,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:49:39,482 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:39,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:39,482 INFO L85 PathProgramCache]: Analyzing trace with hash 199690951, now seen corresponding path program 3 times [2024-06-14 12:49:39,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:39,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920343290] [2024-06-14 12:49:39,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:39,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:41,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:41,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:41,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920343290] [2024-06-14 12:49:41,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920343290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:41,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:41,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:49:41,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301493242] [2024-06-14 12:49:41,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:41,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:49:41,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:41,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:49:41,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:49:41,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:49:41,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 118 transitions, 969 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:41,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:41,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:49:41,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:42,748 INFO L124 PetriNetUnfolderBase]: 1953/2914 cut-off events. [2024-06-14 12:49:42,749 INFO L125 PetriNetUnfolderBase]: For 37111/37233 co-relation queries the response was YES. [2024-06-14 12:49:42,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15972 conditions, 2914 events. 1953/2914 cut-off events. For 37111/37233 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 13485 event pairs, 589 based on Foata normal form. 31/2880 useless extension candidates. Maximal degree in co-relation 15925. Up to 2759 conditions per place. [2024-06-14 12:49:42,763 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 112 selfloop transitions, 20 changer transitions 0/147 dead transitions. [2024-06-14 12:49:42,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 147 transitions, 1359 flow [2024-06-14 12:49:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:49:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:49:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 12:49:42,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920265780730897 [2024-06-14 12:49:42,765 INFO L175 Difference]: Start difference. First operand has 98 places, 118 transitions, 969 flow. Second operand 7 states and 118 transitions. [2024-06-14 12:49:42,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 147 transitions, 1359 flow [2024-06-14 12:49:42,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 147 transitions, 1292 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 12:49:42,791 INFO L231 Difference]: Finished difference. Result has 100 places, 121 transitions, 1000 flow [2024-06-14 12:49:42,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=902, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1000, PETRI_PLACES=100, PETRI_TRANSITIONS=121} [2024-06-14 12:49:42,791 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-06-14 12:49:42,792 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 121 transitions, 1000 flow [2024-06-14 12:49:42,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:42,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:42,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:42,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:49:42,792 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:42,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:42,793 INFO L85 PathProgramCache]: Analyzing trace with hash 836920596, now seen corresponding path program 2 times [2024-06-14 12:49:42,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:42,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241961867] [2024-06-14 12:49:42,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:42,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:44,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:44,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:44,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241961867] [2024-06-14 12:49:44,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241961867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:44,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:44,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:49:44,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125782032] [2024-06-14 12:49:44,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:44,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:49:44,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:44,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:49:44,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:49:44,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:49:44,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 121 transitions, 1000 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:44,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:44,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:49:44,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:46,180 INFO L124 PetriNetUnfolderBase]: 2179/3227 cut-off events. [2024-06-14 12:49:46,180 INFO L125 PetriNetUnfolderBase]: For 38826/38839 co-relation queries the response was YES. [2024-06-14 12:49:46,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17646 conditions, 3227 events. 2179/3227 cut-off events. For 38826/38839 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14754 event pairs, 572 based on Foata normal form. 22/3246 useless extension candidates. Maximal degree in co-relation 17598. Up to 2928 conditions per place. [2024-06-14 12:49:46,197 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 144 selfloop transitions, 40 changer transitions 0/187 dead transitions. [2024-06-14 12:49:46,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 187 transitions, 1851 flow [2024-06-14 12:49:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:49:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:49:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:49:46,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-14 12:49:46,199 INFO L175 Difference]: Start difference. First operand has 100 places, 121 transitions, 1000 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:49:46,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 187 transitions, 1851 flow [2024-06-14 12:49:46,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 187 transitions, 1774 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:49:46,227 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1282 flow [2024-06-14 12:49:46,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1282, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-14 12:49:46,228 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 62 predicate places. [2024-06-14 12:49:46,228 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1282 flow [2024-06-14 12:49:46,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:46,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:46,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:46,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:49:46,228 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:46,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:46,229 INFO L85 PathProgramCache]: Analyzing trace with hash 836926176, now seen corresponding path program 3 times [2024-06-14 12:49:46,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:46,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503477561] [2024-06-14 12:49:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:46,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:48,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:48,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:48,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503477561] [2024-06-14 12:49:48,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503477561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:48,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:48,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:49:48,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556601984] [2024-06-14 12:49:48,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:48,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:49:48,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:48,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:49:48,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:49:48,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:49:48,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1282 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:48,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:48,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:49:48,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:49,658 INFO L124 PetriNetUnfolderBase]: 2223/3291 cut-off events. [2024-06-14 12:49:49,659 INFO L125 PetriNetUnfolderBase]: For 45741/45754 co-relation queries the response was YES. [2024-06-14 12:49:49,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19507 conditions, 3291 events. 2223/3291 cut-off events. For 45741/45754 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15082 event pairs, 587 based on Foata normal form. 27/3315 useless extension candidates. Maximal degree in co-relation 19456. Up to 3022 conditions per place. [2024-06-14 12:49:49,677 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 139 selfloop transitions, 53 changer transitions 0/195 dead transitions. [2024-06-14 12:49:49,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 195 transitions, 2032 flow [2024-06-14 12:49:49,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:49:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:49:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 12:49:49,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-14 12:49:49,679 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1282 flow. Second operand 9 states and 148 transitions. [2024-06-14 12:49:49,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 195 transitions, 2032 flow [2024-06-14 12:49:49,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 195 transitions, 1919 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 12:49:49,721 INFO L231 Difference]: Finished difference. Result has 113 places, 162 transitions, 1558 flow [2024-06-14 12:49:49,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1558, PETRI_PLACES=113, PETRI_TRANSITIONS=162} [2024-06-14 12:49:49,722 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-14 12:49:49,722 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 162 transitions, 1558 flow [2024-06-14 12:49:49,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:49,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:49,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:49,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:49:49,727 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:49,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:49,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1734038016, now seen corresponding path program 4 times [2024-06-14 12:49:49,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:49,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764245226] [2024-06-14 12:49:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:49,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:51,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764245226] [2024-06-14 12:49:51,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764245226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:51,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:51,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:49:51,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040373657] [2024-06-14 12:49:51,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:51,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:49:51,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:51,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:49:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:49:51,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:49:51,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 162 transitions, 1558 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:51,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:51,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:49:51,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:52,999 INFO L124 PetriNetUnfolderBase]: 2213/3277 cut-off events. [2024-06-14 12:49:52,999 INFO L125 PetriNetUnfolderBase]: For 48760/48773 co-relation queries the response was YES. [2024-06-14 12:49:53,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20608 conditions, 3277 events. 2213/3277 cut-off events. For 48760/48773 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14952 event pairs, 601 based on Foata normal form. 16/3290 useless extension candidates. Maximal degree in co-relation 20553. Up to 3113 conditions per place. [2024-06-14 12:49:53,017 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 166 selfloop transitions, 28 changer transitions 0/197 dead transitions. [2024-06-14 12:49:53,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 197 transitions, 2071 flow [2024-06-14 12:49:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:49:53,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-06-14 12:49:53,022 INFO L175 Difference]: Start difference. First operand has 113 places, 162 transitions, 1558 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:49:53,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 197 transitions, 2071 flow [2024-06-14 12:49:53,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 197 transitions, 1939 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 12:49:53,085 INFO L231 Difference]: Finished difference. Result has 116 places, 165 transitions, 1538 flow [2024-06-14 12:49:53,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1538, PETRI_PLACES=116, PETRI_TRANSITIONS=165} [2024-06-14 12:49:53,101 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-14 12:49:53,101 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 165 transitions, 1538 flow [2024-06-14 12:49:53,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:53,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:53,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:53,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:49:53,102 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:53,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:53,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1777306034, now seen corresponding path program 1 times [2024-06-14 12:49:53,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:53,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050319837] [2024-06-14 12:49:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:53,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:55,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:55,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050319837] [2024-06-14 12:49:55,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050319837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:55,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:55,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:55,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610583601] [2024-06-14 12:49:55,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:55,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:55,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:49:55,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 165 transitions, 1538 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:55,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:55,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:49:55,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:49:56,912 INFO L124 PetriNetUnfolderBase]: 2200/3283 cut-off events. [2024-06-14 12:49:56,912 INFO L125 PetriNetUnfolderBase]: For 63678/63896 co-relation queries the response was YES. [2024-06-14 12:49:56,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21407 conditions, 3283 events. 2200/3283 cut-off events. For 63678/63896 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15400 event pairs, 425 based on Foata normal form. 28/3254 useless extension candidates. Maximal degree in co-relation 21351. Up to 2946 conditions per place. [2024-06-14 12:49:56,935 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 154 selfloop transitions, 35 changer transitions 0/211 dead transitions. [2024-06-14 12:49:56,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 211 transitions, 2190 flow [2024-06-14 12:49:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:49:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:49:56,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:49:56,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-14 12:49:56,937 INFO L175 Difference]: Start difference. First operand has 116 places, 165 transitions, 1538 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:49:56,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 211 transitions, 2190 flow [2024-06-14 12:49:56,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 211 transitions, 2102 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 12:49:56,975 INFO L231 Difference]: Finished difference. Result has 118 places, 169 transitions, 1623 flow [2024-06-14 12:49:56,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1623, PETRI_PLACES=118, PETRI_TRANSITIONS=169} [2024-06-14 12:49:56,976 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 74 predicate places. [2024-06-14 12:49:56,976 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 169 transitions, 1623 flow [2024-06-14 12:49:56,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:56,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:49:56,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:49:56,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:49:56,977 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:49:56,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:49:56,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1777366484, now seen corresponding path program 2 times [2024-06-14 12:49:56,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:49:56,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211324006] [2024-06-14 12:49:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:49:56,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:49:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:49:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:49:59,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:49:59,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211324006] [2024-06-14 12:49:59,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211324006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:49:59,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:49:59,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:49:59,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072545711] [2024-06-14 12:49:59,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:49:59,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:49:59,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:49:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:49:59,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:49:59,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:49:59,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 169 transitions, 1623 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:49:59,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:49:59,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:49:59,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:00,895 INFO L124 PetriNetUnfolderBase]: 2220/3315 cut-off events. [2024-06-14 12:50:00,895 INFO L125 PetriNetUnfolderBase]: For 70151/70354 co-relation queries the response was YES. [2024-06-14 12:50:00,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22043 conditions, 3315 events. 2220/3315 cut-off events. For 70151/70354 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15628 event pairs, 536 based on Foata normal form. 42/3297 useless extension candidates. Maximal degree in co-relation 21986. Up to 3058 conditions per place. [2024-06-14 12:50:00,915 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 156 selfloop transitions, 32 changer transitions 0/210 dead transitions. [2024-06-14 12:50:00,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 210 transitions, 2153 flow [2024-06-14 12:50:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:50:00,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:50:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:50:00,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41569767441860467 [2024-06-14 12:50:00,918 INFO L175 Difference]: Start difference. First operand has 118 places, 169 transitions, 1623 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:50:00,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 210 transitions, 2153 flow [2024-06-14 12:50:00,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 210 transitions, 2057 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:50:00,970 INFO L231 Difference]: Finished difference. Result has 122 places, 171 transitions, 1652 flow [2024-06-14 12:50:00,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1652, PETRI_PLACES=122, PETRI_TRANSITIONS=171} [2024-06-14 12:50:00,971 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 78 predicate places. [2024-06-14 12:50:00,971 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 171 transitions, 1652 flow [2024-06-14 12:50:00,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:00,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:00,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:00,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:50:00,972 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:00,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:00,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1780047798, now seen corresponding path program 1 times [2024-06-14 12:50:00,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:00,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056105658] [2024-06-14 12:50:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:00,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:03,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:03,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056105658] [2024-06-14 12:50:03,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056105658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:03,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:03,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:03,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839990907] [2024-06-14 12:50:03,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:03,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:03,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:03,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:03,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:03,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:50:03,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 171 transitions, 1652 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:03,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:03,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:50:03,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:05,189 INFO L124 PetriNetUnfolderBase]: 2593/3826 cut-off events. [2024-06-14 12:50:05,190 INFO L125 PetriNetUnfolderBase]: For 73939/73970 co-relation queries the response was YES. [2024-06-14 12:50:05,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25217 conditions, 3826 events. 2593/3826 cut-off events. For 73939/73970 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18094 event pairs, 577 based on Foata normal form. 35/3856 useless extension candidates. Maximal degree in co-relation 25158. Up to 2957 conditions per place. [2024-06-14 12:50:05,213 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 167 selfloop transitions, 91 changer transitions 0/261 dead transitions. [2024-06-14 12:50:05,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 261 transitions, 2989 flow [2024-06-14 12:50:05,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-14 12:50:05,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702842377260982 [2024-06-14 12:50:05,215 INFO L175 Difference]: Start difference. First operand has 122 places, 171 transitions, 1652 flow. Second operand 9 states and 182 transitions. [2024-06-14 12:50:05,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 261 transitions, 2989 flow [2024-06-14 12:50:05,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 261 transitions, 2879 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:05,279 INFO L231 Difference]: Finished difference. Result has 128 places, 195 transitions, 2159 flow [2024-06-14 12:50:05,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2159, PETRI_PLACES=128, PETRI_TRANSITIONS=195} [2024-06-14 12:50:05,280 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 84 predicate places. [2024-06-14 12:50:05,280 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 195 transitions, 2159 flow [2024-06-14 12:50:05,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:05,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:05,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:05,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:50:05,281 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:05,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:05,281 INFO L85 PathProgramCache]: Analyzing trace with hash 170267998, now seen corresponding path program 2 times [2024-06-14 12:50:05,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:05,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321738746] [2024-06-14 12:50:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:05,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:05,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:10,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:10,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321738746] [2024-06-14 12:50:10,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321738746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:10,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:10,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:10,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953150192] [2024-06-14 12:50:10,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:10,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:10,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:10,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:10,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:10,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:50:10,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 195 transitions, 2159 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:10,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:10,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:50:10,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:11,778 INFO L124 PetriNetUnfolderBase]: 2657/3916 cut-off events. [2024-06-14 12:50:11,778 INFO L125 PetriNetUnfolderBase]: For 85709/85722 co-relation queries the response was YES. [2024-06-14 12:50:11,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27765 conditions, 3916 events. 2657/3916 cut-off events. For 85709/85722 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18549 event pairs, 578 based on Foata normal form. 22/3935 useless extension candidates. Maximal degree in co-relation 27702. Up to 3663 conditions per place. [2024-06-14 12:50:11,811 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 209 selfloop transitions, 35 changer transitions 0/247 dead transitions. [2024-06-14 12:50:11,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 247 transitions, 3030 flow [2024-06-14 12:50:11,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 12:50:11,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-14 12:50:11,814 INFO L175 Difference]: Start difference. First operand has 128 places, 195 transitions, 2159 flow. Second operand 9 states and 160 transitions. [2024-06-14 12:50:11,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 247 transitions, 3030 flow [2024-06-14 12:50:11,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 247 transitions, 2848 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-14 12:50:11,909 INFO L231 Difference]: Finished difference. Result has 134 places, 200 transitions, 2161 flow [2024-06-14 12:50:11,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1977, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2161, PETRI_PLACES=134, PETRI_TRANSITIONS=200} [2024-06-14 12:50:11,909 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 90 predicate places. [2024-06-14 12:50:11,909 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 200 transitions, 2161 flow [2024-06-14 12:50:11,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:11,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:11,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:11,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:50:11,910 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:11,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:11,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1780162994, now seen corresponding path program 3 times [2024-06-14 12:50:11,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:11,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407080778] [2024-06-14 12:50:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:11,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:15,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:15,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407080778] [2024-06-14 12:50:15,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407080778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:15,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:15,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:15,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428277462] [2024-06-14 12:50:15,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:15,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:15,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:15,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:15,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:15,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:15,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 200 transitions, 2161 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:15,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:15,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:15,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:16,796 INFO L124 PetriNetUnfolderBase]: 2569/3805 cut-off events. [2024-06-14 12:50:16,796 INFO L125 PetriNetUnfolderBase]: For 100647/100874 co-relation queries the response was YES. [2024-06-14 12:50:16,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28051 conditions, 3805 events. 2569/3805 cut-off events. For 100647/100874 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 18194 event pairs, 543 based on Foata normal form. 31/3775 useless extension candidates. Maximal degree in co-relation 27986. Up to 3599 conditions per place. [2024-06-14 12:50:16,826 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 188 selfloop transitions, 23 changer transitions 0/237 dead transitions. [2024-06-14 12:50:16,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 237 transitions, 2733 flow [2024-06-14 12:50:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:50:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:50:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 12:50:16,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-14 12:50:16,829 INFO L175 Difference]: Start difference. First operand has 134 places, 200 transitions, 2161 flow. Second operand 8 states and 136 transitions. [2024-06-14 12:50:16,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 237 transitions, 2733 flow [2024-06-14 12:50:16,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 237 transitions, 2585 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 12:50:16,925 INFO L231 Difference]: Finished difference. Result has 135 places, 202 transitions, 2126 flow [2024-06-14 12:50:16,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2126, PETRI_PLACES=135, PETRI_TRANSITIONS=202} [2024-06-14 12:50:16,926 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-14 12:50:16,927 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 202 transitions, 2126 flow [2024-06-14 12:50:16,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:16,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:16,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:16,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:50:16,927 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:16,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1780163118, now seen corresponding path program 3 times [2024-06-14 12:50:16,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:16,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088039967] [2024-06-14 12:50:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:16,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:20,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:20,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088039967] [2024-06-14 12:50:20,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088039967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:20,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:20,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:20,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488647997] [2024-06-14 12:50:20,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:20,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:20,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:20,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:20,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:20,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:50:20,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 202 transitions, 2126 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:20,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:20,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:50:20,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:22,470 INFO L124 PetriNetUnfolderBase]: 2761/4062 cut-off events. [2024-06-14 12:50:22,471 INFO L125 PetriNetUnfolderBase]: For 97745/97758 co-relation queries the response was YES. [2024-06-14 12:50:22,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29200 conditions, 4062 events. 2761/4062 cut-off events. For 97745/97758 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19240 event pairs, 563 based on Foata normal form. 22/4081 useless extension candidates. Maximal degree in co-relation 29134. Up to 3690 conditions per place. [2024-06-14 12:50:22,503 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 220 selfloop transitions, 47 changer transitions 0/270 dead transitions. [2024-06-14 12:50:22,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 270 transitions, 3260 flow [2024-06-14 12:50:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:50:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:50:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 12:50:22,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:50:22,505 INFO L175 Difference]: Start difference. First operand has 135 places, 202 transitions, 2126 flow. Second operand 10 states and 180 transitions. [2024-06-14 12:50:22,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 270 transitions, 3260 flow [2024-06-14 12:50:22,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 270 transitions, 3162 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:22,599 INFO L231 Difference]: Finished difference. Result has 140 places, 214 transitions, 2385 flow [2024-06-14 12:50:22,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2385, PETRI_PLACES=140, PETRI_TRANSITIONS=214} [2024-06-14 12:50:22,600 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 96 predicate places. [2024-06-14 12:50:22,600 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 214 transitions, 2385 flow [2024-06-14 12:50:22,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:22,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:22,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:22,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:50:22,601 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:22,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:22,601 INFO L85 PathProgramCache]: Analyzing trace with hash 174916572, now seen corresponding path program 1 times [2024-06-14 12:50:22,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:22,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811808031] [2024-06-14 12:50:22,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:22,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:25,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:25,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811808031] [2024-06-14 12:50:25,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811808031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:25,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:25,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:25,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320768970] [2024-06-14 12:50:25,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:25,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:25,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:25,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:50:25,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 214 transitions, 2385 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:25,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:25,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:50:25,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:27,311 INFO L124 PetriNetUnfolderBase]: 2917/4310 cut-off events. [2024-06-14 12:50:27,311 INFO L125 PetriNetUnfolderBase]: For 116010/116023 co-relation queries the response was YES. [2024-06-14 12:50:27,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31592 conditions, 4310 events. 2917/4310 cut-off events. For 116010/116023 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 20889 event pairs, 575 based on Foata normal form. 44/4351 useless extension candidates. Maximal degree in co-relation 31524. Up to 3830 conditions per place. [2024-06-14 12:50:27,347 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 196 selfloop transitions, 58 changer transitions 0/257 dead transitions. [2024-06-14 12:50:27,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 257 transitions, 3232 flow [2024-06-14 12:50:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 12:50:27,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-14 12:50:27,349 INFO L175 Difference]: Start difference. First operand has 140 places, 214 transitions, 2385 flow. Second operand 9 states and 154 transitions. [2024-06-14 12:50:27,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 257 transitions, 3232 flow [2024-06-14 12:50:27,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 257 transitions, 3066 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:27,477 INFO L231 Difference]: Finished difference. Result has 143 places, 218 transitions, 2442 flow [2024-06-14 12:50:27,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2219, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2442, PETRI_PLACES=143, PETRI_TRANSITIONS=218} [2024-06-14 12:50:27,478 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 99 predicate places. [2024-06-14 12:50:27,478 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 218 transitions, 2442 flow [2024-06-14 12:50:27,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:27,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:27,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:27,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:50:27,479 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:27,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:27,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1895631918, now seen corresponding path program 4 times [2024-06-14 12:50:27,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:27,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996631526] [2024-06-14 12:50:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:27,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:29,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:29,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996631526] [2024-06-14 12:50:29,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996631526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:29,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:29,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:29,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486266520] [2024-06-14 12:50:29,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:29,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:29,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:29,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:29,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:29,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:50:29,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 218 transitions, 2442 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:29,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:29,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:50:29,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:31,919 INFO L124 PetriNetUnfolderBase]: 3183/4693 cut-off events. [2024-06-14 12:50:31,919 INFO L125 PetriNetUnfolderBase]: For 123231/123237 co-relation queries the response was YES. [2024-06-14 12:50:31,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34784 conditions, 4693 events. 3183/4693 cut-off events. For 123231/123237 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 22832 event pairs, 642 based on Foata normal form. 14/4704 useless extension candidates. Maximal degree in co-relation 34714. Up to 4376 conditions per place. [2024-06-14 12:50:31,961 INFO L140 encePairwiseOnDemand]: 25/43 looper letters, 264 selfloop transitions, 74 changer transitions 0/341 dead transitions. [2024-06-14 12:50:31,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 341 transitions, 4261 flow [2024-06-14 12:50:31,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 12:50:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 12:50:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 223 transitions. [2024-06-14 12:50:31,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39892665474060823 [2024-06-14 12:50:31,963 INFO L175 Difference]: Start difference. First operand has 143 places, 218 transitions, 2442 flow. Second operand 13 states and 223 transitions. [2024-06-14 12:50:31,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 341 transitions, 4261 flow [2024-06-14 12:50:32,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 341 transitions, 4034 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 12:50:32,115 INFO L231 Difference]: Finished difference. Result has 157 places, 274 transitions, 3240 flow [2024-06-14 12:50:32,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3240, PETRI_PLACES=157, PETRI_TRANSITIONS=274} [2024-06-14 12:50:32,116 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-14 12:50:32,116 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 274 transitions, 3240 flow [2024-06-14 12:50:32,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:32,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:32,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:32,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:50:32,116 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:32,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2062641826, now seen corresponding path program 5 times [2024-06-14 12:50:32,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:32,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529940670] [2024-06-14 12:50:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:32,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:34,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:34,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529940670] [2024-06-14 12:50:34,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529940670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:34,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:34,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:34,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379290711] [2024-06-14 12:50:34,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:34,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:34,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:34,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:34,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:34,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:50:34,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 274 transitions, 3240 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:34,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:34,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:50:34,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:36,506 INFO L124 PetriNetUnfolderBase]: 3307/4871 cut-off events. [2024-06-14 12:50:36,506 INFO L125 PetriNetUnfolderBase]: For 129089/129102 co-relation queries the response was YES. [2024-06-14 12:50:36,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36687 conditions, 4871 events. 3307/4871 cut-off events. For 129089/129102 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 23884 event pairs, 633 based on Foata normal form. 22/4889 useless extension candidates. Maximal degree in co-relation 36608. Up to 4186 conditions per place. [2024-06-14 12:50:36,551 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 215 selfloop transitions, 125 changer transitions 0/343 dead transitions. [2024-06-14 12:50:36,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 343 transitions, 4571 flow [2024-06-14 12:50:36,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:50:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:50:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 199 transitions. [2024-06-14 12:50:36,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856589147286822 [2024-06-14 12:50:36,552 INFO L175 Difference]: Start difference. First operand has 157 places, 274 transitions, 3240 flow. Second operand 12 states and 199 transitions. [2024-06-14 12:50:36,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 343 transitions, 4571 flow [2024-06-14 12:50:36,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 343 transitions, 4467 flow, removed 49 selfloop flow, removed 2 redundant places. [2024-06-14 12:50:36,747 INFO L231 Difference]: Finished difference. Result has 170 places, 294 transitions, 3773 flow [2024-06-14 12:50:36,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3146, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3773, PETRI_PLACES=170, PETRI_TRANSITIONS=294} [2024-06-14 12:50:36,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 126 predicate places. [2024-06-14 12:50:36,748 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 294 transitions, 3773 flow [2024-06-14 12:50:36,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:36,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:36,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:36,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:50:36,748 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:36,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:36,749 INFO L85 PathProgramCache]: Analyzing trace with hash 781845562, now seen corresponding path program 6 times [2024-06-14 12:50:36,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:36,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405026912] [2024-06-14 12:50:36,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:36,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:36,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:39,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:39,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405026912] [2024-06-14 12:50:39,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405026912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:39,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:39,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:39,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872183149] [2024-06-14 12:50:39,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:39,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:39,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:39,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:39,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:50:39,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 294 transitions, 3773 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:39,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:39,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:50:39,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:41,263 INFO L124 PetriNetUnfolderBase]: 3449/5071 cut-off events. [2024-06-14 12:50:41,263 INFO L125 PetriNetUnfolderBase]: For 145351/145364 co-relation queries the response was YES. [2024-06-14 12:50:41,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39830 conditions, 5071 events. 3449/5071 cut-off events. For 145351/145364 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24965 event pairs, 612 based on Foata normal form. 22/5089 useless extension candidates. Maximal degree in co-relation 39746. Up to 4301 conditions per place. [2024-06-14 12:50:41,303 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 237 selfloop transitions, 132 changer transitions 0/372 dead transitions. [2024-06-14 12:50:41,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 372 transitions, 5384 flow [2024-06-14 12:50:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:50:41,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:50:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2024-06-14 12:50:41,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41226215644820297 [2024-06-14 12:50:41,305 INFO L175 Difference]: Start difference. First operand has 170 places, 294 transitions, 3773 flow. Second operand 11 states and 195 transitions. [2024-06-14 12:50:41,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 372 transitions, 5384 flow [2024-06-14 12:50:41,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 372 transitions, 5097 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:41,510 INFO L231 Difference]: Finished difference. Result has 177 places, 318 transitions, 4302 flow [2024-06-14 12:50:41,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4302, PETRI_PLACES=177, PETRI_TRANSITIONS=318} [2024-06-14 12:50:41,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 133 predicate places. [2024-06-14 12:50:41,515 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 318 transitions, 4302 flow [2024-06-14 12:50:41,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:41,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:41,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:41,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:50:41,515 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:41,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:41,516 INFO L85 PathProgramCache]: Analyzing trace with hash -938881378, now seen corresponding path program 7 times [2024-06-14 12:50:41,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:41,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029555536] [2024-06-14 12:50:41,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:41,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:44,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:44,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029555536] [2024-06-14 12:50:44,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029555536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:44,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:44,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:44,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745706492] [2024-06-14 12:50:44,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:44,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:44,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:44,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:44,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:44,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:50:44,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 318 transitions, 4302 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:44,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:44,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:50:44,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:46,252 INFO L124 PetriNetUnfolderBase]: 3546/5209 cut-off events. [2024-06-14 12:50:46,252 INFO L125 PetriNetUnfolderBase]: For 147066/147079 co-relation queries the response was YES. [2024-06-14 12:50:46,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41523 conditions, 5209 events. 3546/5209 cut-off events. For 147066/147079 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 25744 event pairs, 621 based on Foata normal form. 22/5227 useless extension candidates. Maximal degree in co-relation 41436. Up to 4409 conditions per place. [2024-06-14 12:50:46,310 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 274 selfloop transitions, 117 changer transitions 0/394 dead transitions. [2024-06-14 12:50:46,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 394 transitions, 5824 flow [2024-06-14 12:50:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:50:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:50:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-14 12:50:46,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080338266384778 [2024-06-14 12:50:46,312 INFO L175 Difference]: Start difference. First operand has 177 places, 318 transitions, 4302 flow. Second operand 11 states and 193 transitions. [2024-06-14 12:50:46,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 394 transitions, 5824 flow [2024-06-14 12:50:46,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 394 transitions, 5614 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 12:50:46,618 INFO L231 Difference]: Finished difference. Result has 185 places, 336 transitions, 4677 flow [2024-06-14 12:50:46,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4116, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4677, PETRI_PLACES=185, PETRI_TRANSITIONS=336} [2024-06-14 12:50:46,619 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-14 12:50:46,619 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 336 transitions, 4677 flow [2024-06-14 12:50:46,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:46,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:46,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:46,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:50:46,620 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:46,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:46,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2082103316, now seen corresponding path program 4 times [2024-06-14 12:50:46,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:46,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648676609] [2024-06-14 12:50:46,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:46,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:49,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:49,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:49,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648676609] [2024-06-14 12:50:49,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648676609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:49,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:49,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:49,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070091221] [2024-06-14 12:50:49,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:49,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:49,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:49,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:49,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:49,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-06-14 12:50:49,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 336 transitions, 4677 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:49,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:49,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-06-14 12:50:49,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:51,437 INFO L124 PetriNetUnfolderBase]: 3724/5487 cut-off events. [2024-06-14 12:50:51,438 INFO L125 PetriNetUnfolderBase]: For 193253/193432 co-relation queries the response was YES. [2024-06-14 12:50:51,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46299 conditions, 5487 events. 3724/5487 cut-off events. For 193253/193432 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27694 event pairs, 596 based on Foata normal form. 22/5444 useless extension candidates. Maximal degree in co-relation 46209. Up to 4713 conditions per place. [2024-06-14 12:50:51,485 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 265 selfloop transitions, 109 changer transitions 0/412 dead transitions. [2024-06-14 12:50:51,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 412 transitions, 6214 flow [2024-06-14 12:50:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:50:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:50:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:50:51,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 12:50:51,487 INFO L175 Difference]: Start difference. First operand has 185 places, 336 transitions, 4677 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:50:51,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 412 transitions, 6214 flow [2024-06-14 12:50:51,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 412 transitions, 5959 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-14 12:50:51,762 INFO L231 Difference]: Finished difference. Result has 188 places, 367 transitions, 5315 flow [2024-06-14 12:50:51,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4430, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5315, PETRI_PLACES=188, PETRI_TRANSITIONS=367} [2024-06-14 12:50:51,763 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-14 12:50:51,763 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 367 transitions, 5315 flow [2024-06-14 12:50:51,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:51,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:51,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:51,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:50:51,764 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:51,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:51,764 INFO L85 PathProgramCache]: Analyzing trace with hash 653143772, now seen corresponding path program 2 times [2024-06-14 12:50:51,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:51,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402636687] [2024-06-14 12:50:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:51,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:51,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:54,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:54,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402636687] [2024-06-14 12:50:54,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402636687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:54,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:54,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:54,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038071099] [2024-06-14 12:50:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:54,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:54,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:54,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:50:54,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:50:54,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 367 transitions, 5315 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:54,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:50:54,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:50:54,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:50:56,559 INFO L124 PetriNetUnfolderBase]: 3841/5637 cut-off events. [2024-06-14 12:50:56,559 INFO L125 PetriNetUnfolderBase]: For 189441/189456 co-relation queries the response was YES. [2024-06-14 12:50:56,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48912 conditions, 5637 events. 3841/5637 cut-off events. For 189441/189456 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 28066 event pairs, 675 based on Foata normal form. 18/5651 useless extension candidates. Maximal degree in co-relation 48819. Up to 5348 conditions per place. [2024-06-14 12:50:56,619 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 367 selfloop transitions, 41 changer transitions 0/411 dead transitions. [2024-06-14 12:50:56,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 411 transitions, 6505 flow [2024-06-14 12:50:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:50:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:50:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:50:56,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-14 12:50:56,621 INFO L175 Difference]: Start difference. First operand has 188 places, 367 transitions, 5315 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:50:56,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 411 transitions, 6505 flow [2024-06-14 12:50:56,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 411 transitions, 6403 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:50:56,964 INFO L231 Difference]: Finished difference. Result has 191 places, 372 transitions, 5410 flow [2024-06-14 12:50:56,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5213, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5410, PETRI_PLACES=191, PETRI_TRANSITIONS=372} [2024-06-14 12:50:56,965 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 147 predicate places. [2024-06-14 12:50:56,965 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 372 transitions, 5410 flow [2024-06-14 12:50:56,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:50:56,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:50:56,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:50:56,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:50:56,966 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:50:56,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:50:56,966 INFO L85 PathProgramCache]: Analyzing trace with hash 652847102, now seen corresponding path program 3 times [2024-06-14 12:50:56,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:50:56,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093752428] [2024-06-14 12:50:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:50:56,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:50:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:50:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:50:59,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:50:59,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093752428] [2024-06-14 12:50:59,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093752428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:50:59,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:50:59,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:50:59,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641335892] [2024-06-14 12:50:59,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:50:59,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:50:59,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:50:59,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:50:59,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:00,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:51:00,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 372 transitions, 5410 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:00,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:00,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:51:00,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:02,038 INFO L124 PetriNetUnfolderBase]: 3833/5625 cut-off events. [2024-06-14 12:51:02,038 INFO L125 PetriNetUnfolderBase]: For 196636/196651 co-relation queries the response was YES. [2024-06-14 12:51:02,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48994 conditions, 5625 events. 3833/5625 cut-off events. For 196636/196651 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 28011 event pairs, 732 based on Foata normal form. 18/5639 useless extension candidates. Maximal degree in co-relation 48898. Up to 5414 conditions per place. [2024-06-14 12:51:02,096 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 368 selfloop transitions, 37 changer transitions 0/408 dead transitions. [2024-06-14 12:51:02,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 408 transitions, 6379 flow [2024-06-14 12:51:02,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:51:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:51:02,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:51:02,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 12:51:02,098 INFO L175 Difference]: Start difference. First operand has 191 places, 372 transitions, 5410 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:51:02,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 408 transitions, 6379 flow [2024-06-14 12:51:02,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 408 transitions, 6231 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:02,425 INFO L231 Difference]: Finished difference. Result has 194 places, 372 transitions, 5343 flow [2024-06-14 12:51:02,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5262, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5343, PETRI_PLACES=194, PETRI_TRANSITIONS=372} [2024-06-14 12:51:02,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 150 predicate places. [2024-06-14 12:51:02,426 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 372 transitions, 5343 flow [2024-06-14 12:51:02,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:02,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:02,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:02,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:51:02,426 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:02,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:02,427 INFO L85 PathProgramCache]: Analyzing trace with hash 644565948, now seen corresponding path program 8 times [2024-06-14 12:51:02,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:02,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434853152] [2024-06-14 12:51:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:02,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:04,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:04,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434853152] [2024-06-14 12:51:04,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434853152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:04,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:04,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:51:04,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110673496] [2024-06-14 12:51:04,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:04,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:51:04,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:04,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:51:04,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:51:04,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:51:04,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 372 transitions, 5343 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:04,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:04,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:51:04,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:06,868 INFO L124 PetriNetUnfolderBase]: 3823/5611 cut-off events. [2024-06-14 12:51:06,868 INFO L125 PetriNetUnfolderBase]: For 202061/202076 co-relation queries the response was YES. [2024-06-14 12:51:06,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48798 conditions, 5611 events. 3823/5611 cut-off events. For 202061/202076 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27910 event pairs, 732 based on Foata normal form. 18/5625 useless extension candidates. Maximal degree in co-relation 48701. Up to 5355 conditions per place. [2024-06-14 12:51:06,931 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 376 selfloop transitions, 50 changer transitions 0/429 dead transitions. [2024-06-14 12:51:06,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 429 transitions, 6498 flow [2024-06-14 12:51:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:51:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:51:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 172 transitions. [2024-06-14 12:51:06,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-14 12:51:06,933 INFO L175 Difference]: Start difference. First operand has 194 places, 372 transitions, 5343 flow. Second operand 11 states and 172 transitions. [2024-06-14 12:51:06,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 429 transitions, 6498 flow [2024-06-14 12:51:07,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 429 transitions, 6417 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:07,310 INFO L231 Difference]: Finished difference. Result has 201 places, 382 transitions, 5551 flow [2024-06-14 12:51:07,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5266, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5551, PETRI_PLACES=201, PETRI_TRANSITIONS=382} [2024-06-14 12:51:07,311 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 157 predicate places. [2024-06-14 12:51:07,311 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 382 transitions, 5551 flow [2024-06-14 12:51:07,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:07,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:07,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:07,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:51:07,311 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:07,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:07,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1661341489, now seen corresponding path program 1 times [2024-06-14 12:51:07,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:07,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97188305] [2024-06-14 12:51:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:07,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:08,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:08,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97188305] [2024-06-14 12:51:08,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97188305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:08,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:08,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:51:08,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089810105] [2024-06-14 12:51:08,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:08,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:51:08,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:08,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:51:08,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:51:08,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:51:08,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 382 transitions, 5551 flow. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:08,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:08,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:51:08,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:10,317 INFO L124 PetriNetUnfolderBase]: 3808/5591 cut-off events. [2024-06-14 12:51:10,317 INFO L125 PetriNetUnfolderBase]: For 207341/207356 co-relation queries the response was YES. [2024-06-14 12:51:10,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49521 conditions, 5591 events. 3808/5591 cut-off events. For 207341/207356 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27976 event pairs, 730 based on Foata normal form. 19/5606 useless extension candidates. Maximal degree in co-relation 49421. Up to 5516 conditions per place. [2024-06-14 12:51:10,377 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 368 selfloop transitions, 23 changer transitions 0/394 dead transitions. [2024-06-14 12:51:10,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 394 transitions, 6377 flow [2024-06-14 12:51:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:51:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:51:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-14 12:51:10,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767441860465116 [2024-06-14 12:51:10,379 INFO L175 Difference]: Start difference. First operand has 201 places, 382 transitions, 5551 flow. Second operand 5 states and 81 transitions. [2024-06-14 12:51:10,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 394 transitions, 6377 flow [2024-06-14 12:51:10,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 394 transitions, 6184 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-14 12:51:10,765 INFO L231 Difference]: Finished difference. Result has 199 places, 382 transitions, 5418 flow [2024-06-14 12:51:10,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5358, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5418, PETRI_PLACES=199, PETRI_TRANSITIONS=382} [2024-06-14 12:51:10,766 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 155 predicate places. [2024-06-14 12:51:10,766 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 382 transitions, 5418 flow [2024-06-14 12:51:10,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 7 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:10,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:10,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:10,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:51:10,767 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:10,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:10,767 INFO L85 PathProgramCache]: Analyzing trace with hash -815457629, now seen corresponding path program 1 times [2024-06-14 12:51:10,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:10,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827545696] [2024-06-14 12:51:10,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:10,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:13,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:13,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827545696] [2024-06-14 12:51:13,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827545696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:13,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:13,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:51:13,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950664134] [2024-06-14 12:51:13,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:13,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:51:13,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:51:13,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:51:13,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:51:13,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 382 transitions, 5418 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:13,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:13,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:51:13,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:16,075 INFO L124 PetriNetUnfolderBase]: 4854/7267 cut-off events. [2024-06-14 12:51:16,075 INFO L125 PetriNetUnfolderBase]: For 340955/340984 co-relation queries the response was YES. [2024-06-14 12:51:16,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64212 conditions, 7267 events. 4854/7267 cut-off events. For 340955/340984 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 39063 event pairs, 834 based on Foata normal form. 88/7347 useless extension candidates. Maximal degree in co-relation 64111. Up to 3668 conditions per place. [2024-06-14 12:51:16,160 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 292 selfloop transitions, 194 changer transitions 0/489 dead transitions. [2024-06-14 12:51:16,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 489 transitions, 7687 flow [2024-06-14 12:51:16,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:16,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 12:51:16,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-06-14 12:51:16,164 INFO L175 Difference]: Start difference. First operand has 199 places, 382 transitions, 5418 flow. Second operand 10 states and 212 transitions. [2024-06-14 12:51:16,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 489 transitions, 7687 flow [2024-06-14 12:51:16,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 489 transitions, 7641 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:51:16,656 INFO L231 Difference]: Finished difference. Result has 207 places, 390 transitions, 6015 flow [2024-06-14 12:51:16,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5372, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6015, PETRI_PLACES=207, PETRI_TRANSITIONS=390} [2024-06-14 12:51:16,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-14 12:51:16,657 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 390 transitions, 6015 flow [2024-06-14 12:51:16,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:16,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:16,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:16,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:51:16,657 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:16,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash -815367419, now seen corresponding path program 2 times [2024-06-14 12:51:16,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:16,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100740145] [2024-06-14 12:51:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:16,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:16,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:19,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:19,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100740145] [2024-06-14 12:51:19,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100740145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:19,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:19,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:51:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622514892] [2024-06-14 12:51:19,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:19,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:51:19,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:51:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:51:19,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:51:19,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 390 transitions, 6015 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:19,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:19,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:51:19,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:22,319 INFO L124 PetriNetUnfolderBase]: 5166/7791 cut-off events. [2024-06-14 12:51:22,319 INFO L125 PetriNetUnfolderBase]: For 385047/385076 co-relation queries the response was YES. [2024-06-14 12:51:22,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69893 conditions, 7791 events. 5166/7791 cut-off events. For 385047/385076 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42903 event pairs, 1361 based on Foata normal form. 98/7881 useless extension candidates. Maximal degree in co-relation 69789. Up to 5834 conditions per place. [2024-06-14 12:51:22,401 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 273 selfloop transitions, 193 changer transitions 0/469 dead transitions. [2024-06-14 12:51:22,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 469 transitions, 7748 flow [2024-06-14 12:51:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-14 12:51:22,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-06-14 12:51:22,403 INFO L175 Difference]: Start difference. First operand has 207 places, 390 transitions, 6015 flow. Second operand 10 states and 202 transitions. [2024-06-14 12:51:22,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 469 transitions, 7748 flow [2024-06-14 12:51:23,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 469 transitions, 7419 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 12:51:23,037 INFO L231 Difference]: Finished difference. Result has 212 places, 392 transitions, 6166 flow [2024-06-14 12:51:23,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5690, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6166, PETRI_PLACES=212, PETRI_TRANSITIONS=392} [2024-06-14 12:51:23,038 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 168 predicate places. [2024-06-14 12:51:23,038 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 392 transitions, 6166 flow [2024-06-14 12:51:23,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:23,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:23,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:23,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:51:23,038 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:23,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash 754944675, now seen corresponding path program 3 times [2024-06-14 12:51:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:23,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387468866] [2024-06-14 12:51:23,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:23,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:25,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:25,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387468866] [2024-06-14 12:51:25,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387468866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:25,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:25,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:51:25,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751787472] [2024-06-14 12:51:25,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:25,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:51:25,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:25,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:51:25,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:51:25,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:51:25,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 392 transitions, 6166 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:25,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:25,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:51:25,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:28,530 INFO L124 PetriNetUnfolderBase]: 5719/8690 cut-off events. [2024-06-14 12:51:28,531 INFO L125 PetriNetUnfolderBase]: For 434012/434041 co-relation queries the response was YES. [2024-06-14 12:51:28,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78025 conditions, 8690 events. 5719/8690 cut-off events. For 434012/434041 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 49359 event pairs, 1531 based on Foata normal form. 88/8770 useless extension candidates. Maximal degree in co-relation 77919. Up to 5749 conditions per place. [2024-06-14 12:51:28,629 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 285 selfloop transitions, 194 changer transitions 0/482 dead transitions. [2024-06-14 12:51:28,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 482 transitions, 8150 flow [2024-06-14 12:51:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 12:51:28,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4813953488372093 [2024-06-14 12:51:28,631 INFO L175 Difference]: Start difference. First operand has 212 places, 392 transitions, 6166 flow. Second operand 10 states and 207 transitions. [2024-06-14 12:51:28,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 482 transitions, 8150 flow [2024-06-14 12:51:29,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 482 transitions, 7729 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 12:51:29,254 INFO L231 Difference]: Finished difference. Result has 215 places, 397 transitions, 6310 flow [2024-06-14 12:51:29,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5745, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6310, PETRI_PLACES=215, PETRI_TRANSITIONS=397} [2024-06-14 12:51:29,255 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 171 predicate places. [2024-06-14 12:51:29,255 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 397 transitions, 6310 flow [2024-06-14 12:51:29,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:29,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:29,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:29,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:51:29,255 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:29,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:29,256 INFO L85 PathProgramCache]: Analyzing trace with hash 841636485, now seen corresponding path program 4 times [2024-06-14 12:51:29,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:29,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400768463] [2024-06-14 12:51:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:29,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:34,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:34,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400768463] [2024-06-14 12:51:34,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400768463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:34,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:34,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:51:34,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934788536] [2024-06-14 12:51:34,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:34,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:51:34,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:34,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:51:34,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:51:34,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:51:34,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 397 transitions, 6310 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:34,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:34,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:51:34,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:37,281 INFO L124 PetriNetUnfolderBase]: 6627/10144 cut-off events. [2024-06-14 12:51:37,282 INFO L125 PetriNetUnfolderBase]: For 551279/551294 co-relation queries the response was YES. [2024-06-14 12:51:37,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92012 conditions, 10144 events. 6627/10144 cut-off events. For 551279/551294 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 60194 event pairs, 1982 based on Foata normal form. 86/10226 useless extension candidates. Maximal degree in co-relation 91904. Up to 8222 conditions per place. [2024-06-14 12:51:37,410 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 415 selfloop transitions, 59 changer transitions 0/477 dead transitions. [2024-06-14 12:51:37,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 477 transitions, 8277 flow [2024-06-14 12:51:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-14 12:51:37,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-14 12:51:37,411 INFO L175 Difference]: Start difference. First operand has 215 places, 397 transitions, 6310 flow. Second operand 10 states and 190 transitions. [2024-06-14 12:51:37,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 477 transitions, 8277 flow [2024-06-14 12:51:38,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 477 transitions, 7956 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:38,302 INFO L231 Difference]: Finished difference. Result has 220 places, 404 transitions, 6335 flow [2024-06-14 12:51:38,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5989, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6335, PETRI_PLACES=220, PETRI_TRANSITIONS=404} [2024-06-14 12:51:38,303 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 176 predicate places. [2024-06-14 12:51:38,303 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 404 transitions, 6335 flow [2024-06-14 12:51:38,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:38,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:38,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:51:38,303 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:38,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash -811792499, now seen corresponding path program 5 times [2024-06-14 12:51:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:38,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384737908] [2024-06-14 12:51:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:38,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:42,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:42,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384737908] [2024-06-14 12:51:42,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384737908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:42,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:42,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:51:42,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763355632] [2024-06-14 12:51:42,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:42,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:51:42,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:42,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:51:42,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:51:42,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:51:42,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 404 transitions, 6335 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:42,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:42,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:51:42,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:45,150 INFO L124 PetriNetUnfolderBase]: 6939/10668 cut-off events. [2024-06-14 12:51:45,150 INFO L125 PetriNetUnfolderBase]: For 586987/587002 co-relation queries the response was YES. [2024-06-14 12:51:45,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96234 conditions, 10668 events. 6939/10668 cut-off events. For 586987/587002 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 64178 event pairs, 2270 based on Foata normal form. 88/10752 useless extension candidates. Maximal degree in co-relation 96123. Up to 9730 conditions per place. [2024-06-14 12:51:45,286 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 409 selfloop transitions, 57 changer transitions 0/469 dead transitions. [2024-06-14 12:51:45,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 469 transitions, 7913 flow [2024-06-14 12:51:45,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:51:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:51:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-14 12:51:45,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-14 12:51:45,288 INFO L175 Difference]: Start difference. First operand has 220 places, 404 transitions, 6335 flow. Second operand 10 states and 182 transitions. [2024-06-14 12:51:45,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 469 transitions, 7913 flow [2024-06-14 12:51:46,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 469 transitions, 7757 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 12:51:46,170 INFO L231 Difference]: Finished difference. Result has 224 places, 406 transitions, 6395 flow [2024-06-14 12:51:46,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6185, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6395, PETRI_PLACES=224, PETRI_TRANSITIONS=406} [2024-06-14 12:51:46,170 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 180 predicate places. [2024-06-14 12:51:46,170 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 406 transitions, 6395 flow [2024-06-14 12:51:46,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:46,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:46,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:46,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:51:46,171 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:46,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:46,171 INFO L85 PathProgramCache]: Analyzing trace with hash 841790307, now seen corresponding path program 1 times [2024-06-14 12:51:46,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:46,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627482775] [2024-06-14 12:51:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:46,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:50,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:50,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627482775] [2024-06-14 12:51:50,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627482775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:50,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:50,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:51:50,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197412962] [2024-06-14 12:51:50,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:50,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:51:50,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:51:50,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:51:50,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:51:50,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 406 transitions, 6395 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:50,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:50,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:51:50,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:51:53,826 INFO L124 PetriNetUnfolderBase]: 6986/10745 cut-off events. [2024-06-14 12:51:53,826 INFO L125 PetriNetUnfolderBase]: For 561217/561232 co-relation queries the response was YES. [2024-06-14 12:51:53,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96604 conditions, 10745 events. 6986/10745 cut-off events. For 561217/561232 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 64898 event pairs, 2328 based on Foata normal form. 32/10773 useless extension candidates. Maximal degree in co-relation 96491. Up to 10422 conditions per place. [2024-06-14 12:51:53,968 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 413 selfloop transitions, 45 changer transitions 0/461 dead transitions. [2024-06-14 12:51:53,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 461 transitions, 7838 flow [2024-06-14 12:51:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:51:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:51:53,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 12:51:53,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-14 12:51:53,970 INFO L175 Difference]: Start difference. First operand has 224 places, 406 transitions, 6395 flow. Second operand 9 states and 161 transitions. [2024-06-14 12:51:53,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 461 transitions, 7838 flow [2024-06-14 12:51:54,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 461 transitions, 7667 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 12:51:55,005 INFO L231 Difference]: Finished difference. Result has 225 places, 409 transitions, 6435 flow [2024-06-14 12:51:55,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6435, PETRI_PLACES=225, PETRI_TRANSITIONS=409} [2024-06-14 12:51:55,005 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-14 12:51:55,005 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 409 transitions, 6435 flow [2024-06-14 12:51:55,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:55,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:51:55,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:51:55,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:51:55,006 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:51:55,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:51:55,006 INFO L85 PathProgramCache]: Analyzing trace with hash -811648349, now seen corresponding path program 6 times [2024-06-14 12:51:55,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:51:55,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681747369] [2024-06-14 12:51:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:51:55,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:51:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:51:58,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:51:58,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:51:58,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681747369] [2024-06-14 12:51:58,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681747369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:51:58,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:51:58,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:51:58,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257408691] [2024-06-14 12:51:58,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:51:58,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:51:58,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:51:58,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:51:58,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:51:58,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:51:58,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 409 transitions, 6435 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:51:58,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:51:58,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:51:58,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:02,084 INFO L124 PetriNetUnfolderBase]: 7115/10976 cut-off events. [2024-06-14 12:52:02,084 INFO L125 PetriNetUnfolderBase]: For 602632/602647 co-relation queries the response was YES. [2024-06-14 12:52:02,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96712 conditions, 10976 events. 7115/10976 cut-off events. For 602632/602647 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 66881 event pairs, 2355 based on Foata normal form. 88/11060 useless extension candidates. Maximal degree in co-relation 96598. Up to 10157 conditions per place. [2024-06-14 12:52:02,217 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 420 selfloop transitions, 49 changer transitions 0/472 dead transitions. [2024-06-14 12:52:02,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 472 transitions, 7947 flow [2024-06-14 12:52:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:52:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:52:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-14 12:52:02,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-14 12:52:02,218 INFO L175 Difference]: Start difference. First operand has 225 places, 409 transitions, 6435 flow. Second operand 10 states and 180 transitions. [2024-06-14 12:52:02,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 472 transitions, 7947 flow [2024-06-14 12:52:03,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 472 transitions, 7800 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:03,129 INFO L231 Difference]: Finished difference. Result has 228 places, 411 transitions, 6490 flow [2024-06-14 12:52:03,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6288, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6490, PETRI_PLACES=228, PETRI_TRANSITIONS=411} [2024-06-14 12:52:03,131 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 184 predicate places. [2024-06-14 12:52:03,131 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 411 transitions, 6490 flow [2024-06-14 12:52:03,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:03,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:03,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:03,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:52:03,131 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:03,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:03,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1527011793, now seen corresponding path program 2 times [2024-06-14 12:52:03,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:03,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167232769] [2024-06-14 12:52:03,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:03,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:06,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:06,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:06,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167232769] [2024-06-14 12:52:06,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167232769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:06,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:06,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:06,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596563254] [2024-06-14 12:52:06,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:06,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:06,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:06,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:52:06,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 411 transitions, 6490 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:06,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:06,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:52:06,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:09,673 INFO L124 PetriNetUnfolderBase]: 7181/11082 cut-off events. [2024-06-14 12:52:09,674 INFO L125 PetriNetUnfolderBase]: For 586122/586137 co-relation queries the response was YES. [2024-06-14 12:52:09,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98047 conditions, 11082 events. 7181/11082 cut-off events. For 586122/586137 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 67824 event pairs, 2469 based on Foata normal form. 28/11106 useless extension candidates. Maximal degree in co-relation 97932. Up to 10619 conditions per place. [2024-06-14 12:52:09,823 INFO L140 encePairwiseOnDemand]: 30/43 looper letters, 359 selfloop transitions, 95 changer transitions 0/457 dead transitions. [2024-06-14 12:52:09,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 457 transitions, 7770 flow [2024-06-14 12:52:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:52:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:52:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 12:52:09,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813953488372093 [2024-06-14 12:52:09,825 INFO L175 Difference]: Start difference. First operand has 228 places, 411 transitions, 6490 flow. Second operand 10 states and 164 transitions. [2024-06-14 12:52:09,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 457 transitions, 7770 flow [2024-06-14 12:52:10,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 457 transitions, 7623 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 12:52:10,713 INFO L231 Difference]: Finished difference. Result has 231 places, 418 transitions, 6719 flow [2024-06-14 12:52:10,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6343, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6719, PETRI_PLACES=231, PETRI_TRANSITIONS=418} [2024-06-14 12:52:10,714 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-14 12:52:10,714 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 418 transitions, 6719 flow [2024-06-14 12:52:10,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:10,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:10,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:10,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:52:10,715 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:10,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:10,715 INFO L85 PathProgramCache]: Analyzing trace with hash 965164625, now seen corresponding path program 3 times [2024-06-14 12:52:10,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829732924] [2024-06-14 12:52:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:10,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:13,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:13,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:13,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829732924] [2024-06-14 12:52:13,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829732924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:13,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:13,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:13,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6070581] [2024-06-14 12:52:13,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:13,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:13,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:13,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:13,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:13,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:52:13,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 418 transitions, 6719 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:13,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:13,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:52:13,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:17,182 INFO L124 PetriNetUnfolderBase]: 7269/11222 cut-off events. [2024-06-14 12:52:17,182 INFO L125 PetriNetUnfolderBase]: For 613132/613147 co-relation queries the response was YES. [2024-06-14 12:52:17,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100390 conditions, 11222 events. 7269/11222 cut-off events. For 613132/613147 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 68856 event pairs, 2571 based on Foata normal form. 32/11250 useless extension candidates. Maximal degree in co-relation 100273. Up to 10649 conditions per place. [2024-06-14 12:52:17,307 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 356 selfloop transitions, 106 changer transitions 0/465 dead transitions. [2024-06-14 12:52:17,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 465 transitions, 8061 flow [2024-06-14 12:52:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:52:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:52:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 12:52:17,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3883720930232558 [2024-06-14 12:52:17,309 INFO L175 Difference]: Start difference. First operand has 231 places, 418 transitions, 6719 flow. Second operand 10 states and 167 transitions. [2024-06-14 12:52:17,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 465 transitions, 8061 flow [2024-06-14 12:52:18,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 465 transitions, 7811 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 12:52:18,142 INFO L231 Difference]: Finished difference. Result has 235 places, 421 transitions, 6819 flow [2024-06-14 12:52:18,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6469, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6819, PETRI_PLACES=235, PETRI_TRANSITIONS=421} [2024-06-14 12:52:18,142 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 191 predicate places. [2024-06-14 12:52:18,142 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 421 transitions, 6819 flow [2024-06-14 12:52:18,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:18,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:18,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:18,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:52:18,143 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:18,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:18,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1527226995, now seen corresponding path program 7 times [2024-06-14 12:52:18,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:18,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719111293] [2024-06-14 12:52:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:18,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:21,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:21,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719111293] [2024-06-14 12:52:21,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719111293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:21,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:21,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:21,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974698936] [2024-06-14 12:52:21,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:21,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:21,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:21,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:21,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:21,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:52:21,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 421 transitions, 6819 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:21,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:21,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:52:21,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:25,369 INFO L124 PetriNetUnfolderBase]: 7611/11788 cut-off events. [2024-06-14 12:52:25,370 INFO L125 PetriNetUnfolderBase]: For 704141/704156 co-relation queries the response was YES. [2024-06-14 12:52:25,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105024 conditions, 11788 events. 7611/11788 cut-off events. For 704141/704156 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 73254 event pairs, 2653 based on Foata normal form. 90/11874 useless extension candidates. Maximal degree in co-relation 104906. Up to 10382 conditions per place. [2024-06-14 12:52:25,535 INFO L140 encePairwiseOnDemand]: 29/43 looper letters, 332 selfloop transitions, 153 changer transitions 0/488 dead transitions. [2024-06-14 12:52:25,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 488 transitions, 8548 flow [2024-06-14 12:52:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:52:25,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:52:25,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-14 12:52:25,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40380549682875266 [2024-06-14 12:52:25,537 INFO L175 Difference]: Start difference. First operand has 235 places, 421 transitions, 6819 flow. Second operand 11 states and 191 transitions. [2024-06-14 12:52:25,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 488 transitions, 8548 flow [2024-06-14 12:52:26,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 488 transitions, 8266 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-14 12:52:26,748 INFO L231 Difference]: Finished difference. Result has 240 places, 432 transitions, 7253 flow [2024-06-14 12:52:26,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6537, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7253, PETRI_PLACES=240, PETRI_TRANSITIONS=432} [2024-06-14 12:52:26,748 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 196 predicate places. [2024-06-14 12:52:26,748 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 432 transitions, 7253 flow [2024-06-14 12:52:26,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:26,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:26,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:26,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:52:26,749 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:26,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1532737245, now seen corresponding path program 8 times [2024-06-14 12:52:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:26,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444657613] [2024-06-14 12:52:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:30,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:30,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444657613] [2024-06-14 12:52:30,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444657613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:30,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:30,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:30,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653439355] [2024-06-14 12:52:30,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:30,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:30,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:30,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:30,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:52:30,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 432 transitions, 7253 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:30,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:30,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:52:30,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:34,844 INFO L124 PetriNetUnfolderBase]: 8822/13772 cut-off events. [2024-06-14 12:52:34,845 INFO L125 PetriNetUnfolderBase]: For 931906/931921 co-relation queries the response was YES. [2024-06-14 12:52:34,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125151 conditions, 13772 events. 8822/13772 cut-off events. For 931906/931921 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 89199 event pairs, 3048 based on Foata normal form. 110/13878 useless extension candidates. Maximal degree in co-relation 125030. Up to 9704 conditions per place. [2024-06-14 12:52:35,028 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 375 selfloop transitions, 146 changer transitions 0/524 dead transitions. [2024-06-14 12:52:35,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 524 transitions, 9709 flow [2024-06-14 12:52:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:52:35,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:52:35,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-14 12:52:35,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312896405919662 [2024-06-14 12:52:35,039 INFO L175 Difference]: Start difference. First operand has 240 places, 432 transitions, 7253 flow. Second operand 11 states and 204 transitions. [2024-06-14 12:52:35,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 524 transitions, 9709 flow [2024-06-14 12:52:36,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 524 transitions, 9393 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-14 12:52:36,610 INFO L231 Difference]: Finished difference. Result has 247 places, 449 transitions, 7849 flow [2024-06-14 12:52:36,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6937, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7849, PETRI_PLACES=247, PETRI_TRANSITIONS=449} [2024-06-14 12:52:36,611 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 203 predicate places. [2024-06-14 12:52:36,611 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 449 transitions, 7849 flow [2024-06-14 12:52:36,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:36,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:36,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:36,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:52:36,612 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:36,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1682084259, now seen corresponding path program 9 times [2024-06-14 12:52:36,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:36,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763424684] [2024-06-14 12:52:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:36,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:39,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:39,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763424684] [2024-06-14 12:52:39,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763424684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:39,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:39,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:39,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193271109] [2024-06-14 12:52:39,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:39,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:39,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:39,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:39,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:40,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:52:40,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 449 transitions, 7849 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:40,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:40,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:52:40,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:44,910 INFO L124 PetriNetUnfolderBase]: 9210/14448 cut-off events. [2024-06-14 12:52:44,910 INFO L125 PetriNetUnfolderBase]: For 999135/999150 co-relation queries the response was YES. [2024-06-14 12:52:45,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129020 conditions, 14448 events. 9210/14448 cut-off events. For 999135/999150 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 95345 event pairs, 3564 based on Foata normal form. 160/14604 useless extension candidates. Maximal degree in co-relation 128895. Up to 12567 conditions per place. [2024-06-14 12:52:45,063 INFO L140 encePairwiseOnDemand]: 27/43 looper letters, 393 selfloop transitions, 130 changer transitions 0/526 dead transitions. [2024-06-14 12:52:45,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 526 transitions, 9734 flow [2024-06-14 12:52:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:52:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:52:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 214 transitions. [2024-06-14 12:52:45,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-14 12:52:45,065 INFO L175 Difference]: Start difference. First operand has 247 places, 449 transitions, 7849 flow. Second operand 12 states and 214 transitions. [2024-06-14 12:52:45,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 526 transitions, 9734 flow [2024-06-14 12:52:47,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 526 transitions, 9539 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-14 12:52:47,197 INFO L231 Difference]: Finished difference. Result has 254 places, 452 transitions, 8078 flow [2024-06-14 12:52:47,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7660, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8078, PETRI_PLACES=254, PETRI_TRANSITIONS=452} [2024-06-14 12:52:47,198 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-14 12:52:47,198 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 452 transitions, 8078 flow [2024-06-14 12:52:47,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:47,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:47,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:47,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:52:47,199 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:47,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:47,199 INFO L85 PathProgramCache]: Analyzing trace with hash 109981279, now seen corresponding path program 4 times [2024-06-14 12:52:47,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:47,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120771739] [2024-06-14 12:52:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:47,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:52:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:52:52,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:52:52,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120771739] [2024-06-14 12:52:52,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120771739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:52:52,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:52:52,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:52:52,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494942388] [2024-06-14 12:52:52,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:52:52,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:52:52,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:52:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:52:52,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:52:52,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:52:52,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 452 transitions, 8078 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:52,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:52:52,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:52:52,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:52:57,101 INFO L124 PetriNetUnfolderBase]: 9202/14436 cut-off events. [2024-06-14 12:52:57,102 INFO L125 PetriNetUnfolderBase]: For 880595/880610 co-relation queries the response was YES. [2024-06-14 12:52:57,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129258 conditions, 14436 events. 9202/14436 cut-off events. For 880595/880610 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 95493 event pairs, 3757 based on Foata normal form. 18/14450 useless extension candidates. Maximal degree in co-relation 129131. Up to 14186 conditions per place. [2024-06-14 12:52:57,278 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 444 selfloop transitions, 44 changer transitions 0/491 dead transitions. [2024-06-14 12:52:57,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 491 transitions, 9237 flow [2024-06-14 12:52:57,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:52:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:52:57,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 12:52:57,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37209302325581395 [2024-06-14 12:52:57,280 INFO L175 Difference]: Start difference. First operand has 254 places, 452 transitions, 8078 flow. Second operand 9 states and 144 transitions. [2024-06-14 12:52:57,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 491 transitions, 9237 flow [2024-06-14 12:52:59,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 491 transitions, 8950 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-14 12:52:59,112 INFO L231 Difference]: Finished difference. Result has 254 places, 454 transitions, 7953 flow [2024-06-14 12:52:59,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7791, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7953, PETRI_PLACES=254, PETRI_TRANSITIONS=454} [2024-06-14 12:52:59,113 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-14 12:52:59,113 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 454 transitions, 7953 flow [2024-06-14 12:52:59,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:52:59,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:52:59,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:52:59,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:52:59,114 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:52:59,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:52:59,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1236574401, now seen corresponding path program 5 times [2024-06-14 12:52:59,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:52:59,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611544027] [2024-06-14 12:52:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:52:59,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:52:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:02,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:02,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611544027] [2024-06-14 12:53:02,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611544027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:02,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:02,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:53:02,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174308969] [2024-06-14 12:53:02,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:02,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:53:02,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:02,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:53:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:53:02,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:53:02,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 454 transitions, 7953 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:02,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:02,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:53:02,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:07,334 INFO L124 PetriNetUnfolderBase]: 9222/14468 cut-off events. [2024-06-14 12:53:07,335 INFO L125 PetriNetUnfolderBase]: For 896344/896359 co-relation queries the response was YES. [2024-06-14 12:53:07,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129017 conditions, 14468 events. 9222/14468 cut-off events. For 896344/896359 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 95739 event pairs, 3757 based on Foata normal form. 18/14482 useless extension candidates. Maximal degree in co-relation 128889. Up to 14229 conditions per place. [2024-06-14 12:53:07,629 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 449 selfloop transitions, 41 changer transitions 0/493 dead transitions. [2024-06-14 12:53:07,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 493 transitions, 9112 flow [2024-06-14 12:53:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:53:07,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-14 12:53:07,631 INFO L175 Difference]: Start difference. First operand has 254 places, 454 transitions, 7953 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:53:07,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 493 transitions, 9112 flow [2024-06-14 12:53:09,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 493 transitions, 8970 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 12:53:09,501 INFO L231 Difference]: Finished difference. Result has 256 places, 456 transitions, 7965 flow [2024-06-14 12:53:09,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7811, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7965, PETRI_PLACES=256, PETRI_TRANSITIONS=456} [2024-06-14 12:53:09,502 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 212 predicate places. [2024-06-14 12:53:09,502 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 456 transitions, 7965 flow [2024-06-14 12:53:09,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:09,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:09,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:09,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:53:09,503 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:09,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1227377631, now seen corresponding path program 6 times [2024-06-14 12:53:09,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:09,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459916564] [2024-06-14 12:53:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:09,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:12,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:12,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459916564] [2024-06-14 12:53:12,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459916564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:12,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:12,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:53:12,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984965122] [2024-06-14 12:53:12,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:12,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:53:12,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:12,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:53:12,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:53:12,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:53:12,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 456 transitions, 7965 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:12,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:12,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:53:12,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:53:16,864 INFO L124 PetriNetUnfolderBase]: 9214/14456 cut-off events. [2024-06-14 12:53:16,864 INFO L125 PetriNetUnfolderBase]: For 920793/920808 co-relation queries the response was YES. [2024-06-14 12:53:17,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129304 conditions, 14456 events. 9214/14456 cut-off events. For 920793/920808 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 95551 event pairs, 3692 based on Foata normal form. 18/14470 useless extension candidates. Maximal degree in co-relation 129175. Up to 14145 conditions per place. [2024-06-14 12:53:17,236 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 448 selfloop transitions, 45 changer transitions 0/496 dead transitions. [2024-06-14 12:53:17,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 496 transitions, 9136 flow [2024-06-14 12:53:17,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:53:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:53:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:53:17,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-14 12:53:17,239 INFO L175 Difference]: Start difference. First operand has 256 places, 456 transitions, 7965 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:53:17,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 496 transitions, 9136 flow [2024-06-14 12:53:19,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 496 transitions, 9003 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 12:53:19,020 INFO L231 Difference]: Finished difference. Result has 258 places, 458 transitions, 7998 flow [2024-06-14 12:53:19,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7832, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7998, PETRI_PLACES=258, PETRI_TRANSITIONS=458} [2024-06-14 12:53:19,020 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 214 predicate places. [2024-06-14 12:53:19,020 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 458 transitions, 7998 flow [2024-06-14 12:53:19,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:19,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:53:19,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:53:19,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:53:19,021 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:53:19,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:53:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1493290113, now seen corresponding path program 10 times [2024-06-14 12:53:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:53:19,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029343691] [2024-06-14 12:53:19,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:53:19,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:53:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:53:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:53:21,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:53:21,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029343691] [2024-06-14 12:53:21,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029343691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:53:21,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:53:21,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:53:21,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949883133] [2024-06-14 12:53:21,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:53:21,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:53:21,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:53:21,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:53:21,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:53:22,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 43 [2024-06-14 12:53:22,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 458 transitions, 7998 flow. Second operand has 11 states, 11 states have (on average 7.454545454545454) internal successors, (82), 11 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:53:22,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:53:22,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 43 [2024-06-14 12:53:22,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand