./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_rmo.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/safe019_rmo.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/safe019_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe019_rmo.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 13:24:23,316 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:24:23,382 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:24:23,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:24:23,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:24:23,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:24:23,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:24:23,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:24:23,416 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:24:23,419 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:24:23,419 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:24:23,420 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:24:23,420 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:24:23,421 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:24:23,422 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:24:23,422 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:24:23,422 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:24:23,422 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:24:23,422 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:24:23,423 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:24:23,423 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:24:23,423 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:24:23,423 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:24:23,424 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:24:23,424 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:24:23,424 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:24:23,424 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:24:23,424 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:24:23,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:24:23,425 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:24:23,426 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:24:23,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:24:23,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:24:23,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:24:23,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:24:23,427 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:24:23,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:24:23,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:24:23,427 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:24:23,427 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:24:23,428 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:24:23,428 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:24:23,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:24:23,428 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:24:23,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:24:23,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:24:23,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:24:23,675 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:24:23,676 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:24:23,677 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe019_rmo.opt.yml/witness.yml [2024-06-14 13:24:23,895 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:24:23,895 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:24:23,896 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_rmo.opt.i [2024-06-14 13:24:24,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:24:25,122 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:24:25,136 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_rmo.opt.i [2024-06-14 13:24:25,147 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a60e597f/7e919e502d13403389cbc1b46c2623d5/FLAG059afb362 [2024-06-14 13:24:25,157 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a60e597f/7e919e502d13403389cbc1b46c2623d5 [2024-06-14 13:24:25,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:24:25,158 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:24:25,159 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:24:25,159 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:24:25,166 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:24:25,166 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:24:23" (1/2) ... [2024-06-14 13:24:25,167 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98efe01 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:24:25, skipping insertion in model container [2024-06-14 13:24:25,167 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:24:23" (1/2) ... [2024-06-14 13:24:25,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7627a0c9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:24:25, skipping insertion in model container [2024-06-14 13:24:25,168 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:24:25" (2/2) ... [2024-06-14 13:24:25,170 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@98efe01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25, skipping insertion in model container [2024-06-14 13:24:25,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:24:25" (2/2) ... [2024-06-14 13:24:25,170 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:24:25,343 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:24:25,344 INFO L97 edCorrectnessWitness]: Location invariant before [L878-L878] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0) [2024-06-14 13:24:25,345 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! 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 || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0) [2024-06-14 13:24:25,345 INFO L97 edCorrectnessWitness]: Location invariant before [L876-L876] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0) [2024-06-14 13:24:25,345 INFO L97 edCorrectnessWitness]: Location invariant before [L879-L879] ((((((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p2_EAX$w_buff1_used == (_Bool)0) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$mem_tmp == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$w_buff1 == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || __unbuffered_p2_EAX$w_buff1 == 0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || x$w_buff0_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$w_buff0 == 0)) && (! multithreaded || x$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX$read_delayed_var == 0 || (((0 <= *__unbuffered_p2_EAX$read_delayed_var && *__unbuffered_p2_EAX$read_delayed_var <= 1) && __unbuffered_p2_EAX$read_delayed_var == & x) && (*__unbuffered_p2_EAX$read_delayed_var == 0 || *__unbuffered_p2_EAX$read_delayed_var == 1))))) && (! 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 || x$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p2_EAX$w_buff0 == 0) [2024-06-14 13:24:25,345 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:24:25,345 INFO L106 edCorrectnessWitness]: ghost_update [L872-L872] multithreaded = 1; [2024-06-14 13:24:25,381 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:24:25,716 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:24:25,729 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:24:25,861 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:24:25,898 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:24:25,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25 WrapperNode [2024-06-14 13:24:25,903 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:24:25,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:24:25,904 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:24:25,904 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:24:25,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:25,930 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:25,966 INFO L138 Inliner]: procedures = 176, calls = 103, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 245 [2024-06-14 13:24:25,966 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:24:25,967 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:24:25,967 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:24:25,967 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:24:25,976 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:25,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:25,981 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:25,997 INFO L175 MemorySlicer]: Split 57 memory accesses to 2 slices as follows [2, 55]. 96 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 9 writes are split as follows [0, 9]. [2024-06-14 13:24:25,997 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:25,998 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:26,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:26,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:26,014 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:26,016 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:26,020 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:24:26,020 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:24:26,021 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:24:26,021 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:24:26,021 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (1/1) ... [2024-06-14 13:24:26,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:24:26,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:24:26,042 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 13:24:26,049 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 13:24:26,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-14 13:24:26,081 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-14 13:24:26,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-14 13:24:26,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-14 13:24:26,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:24:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:24:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:24:26,083 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:24:26,083 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:24:26,083 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:24:26,084 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:24:26,084 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:24:26,084 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 13:24:26,084 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 13:24:26,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:24:26,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-14 13:24:26,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:24:26,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:24:26,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:24:26,088 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 13:24:26,238 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:24:26,240 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:24:26,850 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:24:26,851 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:24:27,367 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:24:27,368 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:24:27,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:24:27 BoogieIcfgContainer [2024-06-14 13:24:27,368 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:24:27,370 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:24:27,370 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:24:27,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:24:27,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:24:23" (1/4) ... [2024-06-14 13:24:27,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18be9188 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:24:27, skipping insertion in model container [2024-06-14 13:24:27,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:24:25" (2/4) ... [2024-06-14 13:24:27,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18be9188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:24:27, skipping insertion in model container [2024-06-14 13:24:27,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:24:25" (3/4) ... [2024-06-14 13:24:27,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18be9188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:24:27, skipping insertion in model container [2024-06-14 13:24:27,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:24:27" (4/4) ... [2024-06-14 13:24:27,376 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_rmo.opt.i [2024-06-14 13:24:27,389 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:24:27,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 13:24:27,390 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:24:27,478 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:24:27,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:24:27,543 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 13:24:27,543 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:24:27,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:24:27,546 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 13:24:27,549 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 13:24:27,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:24:27,566 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;@34d596ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:24:27,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 13:24:27,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:24:27,572 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:24:27,572 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:24:27,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:27,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:24:27,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:27,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:27,578 INFO L85 PathProgramCache]: Analyzing trace with hash 900999308, now seen corresponding path program 1 times [2024-06-14 13:24:27,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:27,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694080113] [2024-06-14 13:24:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:27,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:29,679 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 13:24:29,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:29,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694080113] [2024-06-14 13:24:29,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694080113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:29,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:29,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:24:29,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122366163] [2024-06-14 13:24:29,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:29,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:24:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:29,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:24:29,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:24:29,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:24:29,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 13:24:29,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:29,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:24:29,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:31,611 INFO L124 PetriNetUnfolderBase]: 6711/9235 cut-off events. [2024-06-14 13:24:31,611 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-06-14 13:24:31,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18757 conditions, 9235 events. 6711/9235 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 48101 event pairs, 4089 based on Foata normal form. 2/9090 useless extension candidates. Maximal degree in co-relation 18741. Up to 9183 conditions per place. [2024-06-14 13:24:31,656 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 50 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-14 13:24:31,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 253 flow [2024-06-14 13:24:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:24:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:24:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-06-14 13:24:31,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559748427672956 [2024-06-14 13:24:31,666 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 89 transitions. [2024-06-14 13:24:31,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 253 flow [2024-06-14 13:24:31,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 246 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:24:31,671 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 13:24:31,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-14 13:24:31,675 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 13:24:31,675 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 13:24:31,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 13:24:31,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:31,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:31,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:24:31,676 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:31,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:31,677 INFO L85 PathProgramCache]: Analyzing trace with hash -346070984, now seen corresponding path program 1 times [2024-06-14 13:24:31,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:31,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626667679] [2024-06-14 13:24:31,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:31,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:35,104 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 13:24:35,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:35,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626667679] [2024-06-14 13:24:35,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626667679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:35,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:35,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:24:35,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768511758] [2024-06-14 13:24:35,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:35,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:24:35,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:24:35,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:24:35,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:24:35,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 13:24:35,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:35,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:24:35,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:37,355 INFO L124 PetriNetUnfolderBase]: 8525/11672 cut-off events. [2024-06-14 13:24:37,356 INFO L125 PetriNetUnfolderBase]: For 2111/2111 co-relation queries the response was YES. [2024-06-14 13:24:37,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26846 conditions, 11672 events. 8525/11672 cut-off events. For 2111/2111 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59317 event pairs, 4020 based on Foata normal form. 8/11669 useless extension candidates. Maximal degree in co-relation 26831. Up to 11534 conditions per place. [2024-06-14 13:24:37,404 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 61 selfloop transitions, 8 changer transitions 0/74 dead transitions. [2024-06-14 13:24:37,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 339 flow [2024-06-14 13:24:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:24:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:24:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-14 13:24:37,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2024-06-14 13:24:37,407 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 109 transitions. [2024-06-14 13:24:37,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 339 flow [2024-06-14 13:24:37,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 74 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:24:37,410 INFO L231 Difference]: Finished difference. Result has 57 places, 49 transitions, 168 flow [2024-06-14 13:24:37,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=57, PETRI_TRANSITIONS=49} [2024-06-14 13:24:37,411 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 1 predicate places. [2024-06-14 13:24:37,411 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 49 transitions, 168 flow [2024-06-14 13:24:37,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 6 states have internal predecessors, (63), 0 states have call successors, (0), 0 states 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 13:24:37,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:37,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:37,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:24:37,412 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:37,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:37,412 INFO L85 PathProgramCache]: Analyzing trace with hash 719835669, now seen corresponding path program 1 times [2024-06-14 13:24:37,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:37,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900860989] [2024-06-14 13:24:37,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:37,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:39,169 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 13:24:39,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:39,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900860989] [2024-06-14 13:24:39,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900860989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:39,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:39,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:24:39,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106327101] [2024-06-14 13:24:39,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:39,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:24:39,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:39,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:24:39,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:24:39,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:24:39,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 49 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:39,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:39,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:24:39,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:41,348 INFO L124 PetriNetUnfolderBase]: 6677/9197 cut-off events. [2024-06-14 13:24:41,348 INFO L125 PetriNetUnfolderBase]: For 4597/4597 co-relation queries the response was YES. [2024-06-14 13:24:41,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23252 conditions, 9197 events. 6677/9197 cut-off events. For 4597/4597 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 47699 event pairs, 3546 based on Foata normal form. 6/9198 useless extension candidates. Maximal degree in co-relation 23235. Up to 9124 conditions per place. [2024-06-14 13:24:41,389 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 64 selfloop transitions, 10 changer transitions 0/80 dead transitions. [2024-06-14 13:24:41,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 80 transitions, 408 flow [2024-06-14 13:24:41,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:24:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:24:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:24:41,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:24:41,394 INFO L175 Difference]: Start difference. First operand has 57 places, 49 transitions, 168 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:24:41,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 80 transitions, 408 flow [2024-06-14 13:24:41,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 80 transitions, 384 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:24:41,400 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 230 flow [2024-06-14 13:24:41,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-14 13:24:41,401 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-06-14 13:24:41,401 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 230 flow [2024-06-14 13:24:41,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:41,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:41,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:41,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:24:41,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:41,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:41,403 INFO L85 PathProgramCache]: Analyzing trace with hash 272413620, now seen corresponding path program 1 times [2024-06-14 13:24:41,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:41,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583247604] [2024-06-14 13:24:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:41,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:44,699 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 13:24:44,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:44,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583247604] [2024-06-14 13:24:44,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583247604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:44,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:44,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:44,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816424632] [2024-06-14 13:24:44,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:44,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:44,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:44,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:44,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:44,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:24:44,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 230 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:44,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:44,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:24:44,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:46,912 INFO L124 PetriNetUnfolderBase]: 6662/9176 cut-off events. [2024-06-14 13:24:46,913 INFO L125 PetriNetUnfolderBase]: For 8251/8251 co-relation queries the response was YES. [2024-06-14 13:24:46,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25726 conditions, 9176 events. 6662/9176 cut-off events. For 8251/8251 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 47799 event pairs, 3407 based on Foata normal form. 6/9177 useless extension candidates. Maximal degree in co-relation 25706. Up to 9065 conditions per place. [2024-06-14 13:24:46,954 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 74 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-06-14 13:24:46,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 93 transitions, 504 flow [2024-06-14 13:24:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:24:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:24:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 13:24:46,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2024-06-14 13:24:46,957 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 230 flow. Second operand 6 states and 143 transitions. [2024-06-14 13:24:46,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 93 transitions, 504 flow [2024-06-14 13:24:46,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 494 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-14 13:24:46,961 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 282 flow [2024-06-14 13:24:46,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-06-14 13:24:46,962 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-14 13:24:46,962 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 282 flow [2024-06-14 13:24:46,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:24:46,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:46,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:46,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:24:46,962 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:46,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:46,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1413672092, now seen corresponding path program 1 times [2024-06-14 13:24:46,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:46,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915645460] [2024-06-14 13:24:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:46,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:49,672 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 13:24:49,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:49,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915645460] [2024-06-14 13:24:49,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915645460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:49,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:49,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:49,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888504361] [2024-06-14 13:24:49,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:49,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:49,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:49,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:49,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:24:49,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 282 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 13:24:49,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:49,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:24:49,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:52,107 INFO L124 PetriNetUnfolderBase]: 8513/11676 cut-off events. [2024-06-14 13:24:52,107 INFO L125 PetriNetUnfolderBase]: For 16171/16171 co-relation queries the response was YES. [2024-06-14 13:24:52,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34740 conditions, 11676 events. 8513/11676 cut-off events. For 16171/16171 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59406 event pairs, 3792 based on Foata normal form. 6/11671 useless extension candidates. Maximal degree in co-relation 34717. Up to 11438 conditions per place. [2024-06-14 13:24:52,154 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 67 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-14 13:24:52,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 89 transitions, 538 flow [2024-06-14 13:24:52,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:24:52,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:24:52,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:24:52,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:24:52,158 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 282 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:24:52,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 89 transitions, 538 flow [2024-06-14 13:24:52,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 502 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:24:52,167 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 332 flow [2024-06-14 13:24:52,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-14 13:24:52,169 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-14 13:24:52,169 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 332 flow [2024-06-14 13:24:52,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 13:24:52,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:52,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:52,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:24:52,170 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:52,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:52,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1413552122, now seen corresponding path program 2 times [2024-06-14 13:24:52,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:52,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035439491] [2024-06-14 13:24:52,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:52,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:52,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:24:54,827 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 13:24:54,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:24:54,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035439491] [2024-06-14 13:24:54,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035439491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:24:54,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:24:54,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:24:54,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541471015] [2024-06-14 13:24:54,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:24:54,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:24:54,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:24:54,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:24:54,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:24:54,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:24:54,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 13:24:54,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:24:54,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:24:54,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:24:57,749 INFO L124 PetriNetUnfolderBase]: 8495/11652 cut-off events. [2024-06-14 13:24:57,750 INFO L125 PetriNetUnfolderBase]: For 24557/24557 co-relation queries the response was YES. [2024-06-14 13:24:57,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37553 conditions, 11652 events. 8495/11652 cut-off events. For 24557/24557 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 59592 event pairs, 3792 based on Foata normal form. 6/11647 useless extension candidates. Maximal degree in co-relation 37529. Up to 11366 conditions per place. [2024-06-14 13:24:57,796 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 77 selfloop transitions, 21 changer transitions 0/103 dead transitions. [2024-06-14 13:24:57,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 103 transitions, 648 flow [2024-06-14 13:24:57,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:24:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:24:57,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 13:24:57,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2024-06-14 13:24:57,798 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 332 flow. Second operand 6 states and 143 transitions. [2024-06-14 13:24:57,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 103 transitions, 648 flow [2024-06-14 13:24:57,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 103 transitions, 592 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 13:24:57,810 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 373 flow [2024-06-14 13:24:57,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=373, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-14 13:24:57,811 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-06-14 13:24:57,811 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 373 flow [2024-06-14 13:24:57,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 13:24:57,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:24:57,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:24:57,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:24:57,812 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:24:57,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:24:57,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1909532820, now seen corresponding path program 1 times [2024-06-14 13:24:57,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:24:57,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988747531] [2024-06-14 13:24:57,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:24:57,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:24:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:00,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:00,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:00,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988747531] [2024-06-14 13:25:00,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988747531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:00,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:00,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:25:00,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432906105] [2024-06-14 13:25:00,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:00,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:25:00,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:00,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:25:00,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:25:00,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:00,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 373 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 13:25:00,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:00,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:00,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:02,196 INFO L124 PetriNetUnfolderBase]: 6684/9218 cut-off events. [2024-06-14 13:25:02,196 INFO L125 PetriNetUnfolderBase]: For 21177/21177 co-relation queries the response was YES. [2024-06-14 13:25:02,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31000 conditions, 9218 events. 6684/9218 cut-off events. For 21177/21177 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 48127 event pairs, 3476 based on Foata normal form. 4/9213 useless extension candidates. Maximal degree in co-relation 30975. Up to 9118 conditions per place. [2024-06-14 13:25:02,242 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 72 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-06-14 13:25:02,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 621 flow [2024-06-14 13:25:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:25:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:25:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 13:25:02,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377358490566038 [2024-06-14 13:25:02,244 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 373 flow. Second operand 5 states and 116 transitions. [2024-06-14 13:25:02,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 621 flow [2024-06-14 13:25:02,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 91 transitions, 562 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:02,253 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 386 flow [2024-06-14 13:25:02,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=386, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-14 13:25:02,254 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 13:25:02,254 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 386 flow [2024-06-14 13:25:02,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 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 13:25:02,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:02,255 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 13:25:02,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:25:02,255 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:02,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:02,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1267409635, now seen corresponding path program 1 times [2024-06-14 13:25:02,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:02,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966886109] [2024-06-14 13:25:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:02,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:04,329 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 13:25:04,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:04,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966886109] [2024-06-14 13:25:04,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966886109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:04,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:04,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:04,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57148792] [2024-06-14 13:25:04,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:04,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:04,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:04,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:25:04,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 386 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 13:25:04,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:04,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:25:04,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:07,253 INFO L124 PetriNetUnfolderBase]: 8899/12280 cut-off events. [2024-06-14 13:25:07,253 INFO L125 PetriNetUnfolderBase]: For 37329/37329 co-relation queries the response was YES. [2024-06-14 13:25:07,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43380 conditions, 12280 events. 8899/12280 cut-off events. For 37329/37329 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 63721 event pairs, 2615 based on Foata normal form. 24/12293 useless extension candidates. Maximal degree in co-relation 43354. Up to 11361 conditions per place. [2024-06-14 13:25:07,300 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 100 selfloop transitions, 27 changer transitions 0/132 dead transitions. [2024-06-14 13:25:07,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 132 transitions, 872 flow [2024-06-14 13:25:07,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:25:07,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:25:07,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 13:25:07,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-14 13:25:07,303 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 386 flow. Second operand 7 states and 175 transitions. [2024-06-14 13:25:07,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 132 transitions, 872 flow [2024-06-14 13:25:07,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 132 transitions, 834 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:25:07,320 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 467 flow [2024-06-14 13:25:07,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=467, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2024-06-14 13:25:07,321 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-14 13:25:07,321 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 467 flow [2024-06-14 13:25:07,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 13:25:07,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:07,322 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 13:25:07,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:25:07,322 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:07,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:07,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1334887083, now seen corresponding path program 2 times [2024-06-14 13:25:07,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:07,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29559379] [2024-06-14 13:25:07,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:07,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:10,405 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 13:25:10,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:10,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29559379] [2024-06-14 13:25:10,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29559379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:10,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:10,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:10,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022217134] [2024-06-14 13:25:10,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:10,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:10,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:10,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:10,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:10,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:25:10,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 467 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 13:25:10,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:10,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:25:10,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:13,031 INFO L124 PetriNetUnfolderBase]: 8830/12181 cut-off events. [2024-06-14 13:25:13,031 INFO L125 PetriNetUnfolderBase]: For 45721/45721 co-relation queries the response was YES. [2024-06-14 13:25:13,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44773 conditions, 12181 events. 8830/12181 cut-off events. For 45721/45721 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 63030 event pairs, 3236 based on Foata normal form. 30/12200 useless extension candidates. Maximal degree in co-relation 44746. Up to 11577 conditions per place. [2024-06-14 13:25:13,105 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 89 selfloop transitions, 22 changer transitions 0/116 dead transitions. [2024-06-14 13:25:13,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 116 transitions, 795 flow [2024-06-14 13:25:13,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:25:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:25:13,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:25:13,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:25:13,108 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 467 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:25:13,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 116 transitions, 795 flow [2024-06-14 13:25:13,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 116 transitions, 761 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:25:13,136 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 491 flow [2024-06-14 13:25:13,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=491, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-14 13:25:13,137 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-14 13:25:13,137 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 491 flow [2024-06-14 13:25:13,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 13:25:13,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:13,137 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 13:25:13,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:25:13,137 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:13,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:13,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1213858299, now seen corresponding path program 3 times [2024-06-14 13:25:13,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:13,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278166413] [2024-06-14 13:25:13,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:16,037 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 13:25:16,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:16,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278166413] [2024-06-14 13:25:16,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278166413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:16,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:16,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:25:16,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315662456] [2024-06-14 13:25:16,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:16,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:25:16,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:16,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:25:16,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:25:16,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:25:16,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 491 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 13:25:16,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:16,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:25:16,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:18,943 INFO L124 PetriNetUnfolderBase]: 8912/12311 cut-off events. [2024-06-14 13:25:18,944 INFO L125 PetriNetUnfolderBase]: For 52933/52933 co-relation queries the response was YES. [2024-06-14 13:25:18,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46345 conditions, 12311 events. 8912/12311 cut-off events. For 52933/52933 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 63956 event pairs, 3625 based on Foata normal form. 30/12330 useless extension candidates. Maximal degree in co-relation 46316. Up to 11755 conditions per place. [2024-06-14 13:25:19,013 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 99 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2024-06-14 13:25:19,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 893 flow [2024-06-14 13:25:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:25:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:25:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:25:19,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:25:19,015 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 491 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:25:19,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 893 flow [2024-06-14 13:25:19,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 127 transitions, 841 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:19,056 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 529 flow [2024-06-14 13:25:19,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=529, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2024-06-14 13:25:19,056 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-14 13:25:19,056 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 529 flow [2024-06-14 13:25:19,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states 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 13:25:19,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:19,057 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 13:25:19,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:25:19,057 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:19,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1213673849, now seen corresponding path program 1 times [2024-06-14 13:25:19,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:19,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800373694] [2024-06-14 13:25:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:19,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:25:22,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:22,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800373694] [2024-06-14 13:25:22,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800373694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:22,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:22,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:25:22,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945569666] [2024-06-14 13:25:22,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:22,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:25:22,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:25:22,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:25:22,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:25:22,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 529 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 13:25:22,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:22,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:25:22,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:25,297 INFO L124 PetriNetUnfolderBase]: 8873/12254 cut-off events. [2024-06-14 13:25:25,298 INFO L125 PetriNetUnfolderBase]: For 62093/62093 co-relation queries the response was YES. [2024-06-14 13:25:25,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47494 conditions, 12254 events. 8873/12254 cut-off events. For 62093/62093 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 63661 event pairs, 3248 based on Foata normal form. 18/12261 useless extension candidates. Maximal degree in co-relation 47464. Up to 11208 conditions per place. [2024-06-14 13:25:25,367 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 97 selfloop transitions, 29 changer transitions 0/131 dead transitions. [2024-06-14 13:25:25,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 131 transitions, 939 flow [2024-06-14 13:25:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:25:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:25:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:25:25,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-14 13:25:25,369 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 529 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:25:25,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 131 transitions, 939 flow [2024-06-14 13:25:25,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 131 transitions, 885 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:25,415 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 560 flow [2024-06-14 13:25:25,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=560, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-06-14 13:25:25,416 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-14 13:25:25,416 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 560 flow [2024-06-14 13:25:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states 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 13:25:25,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:25,417 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 13:25:25,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:25:25,417 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:25,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:25,417 INFO L85 PathProgramCache]: Analyzing trace with hash -881292961, now seen corresponding path program 1 times [2024-06-14 13:25:25,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:25,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076056524] [2024-06-14 13:25:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:25,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:28,170 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 13:25:28,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:28,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076056524] [2024-06-14 13:25:28,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076056524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:28,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:28,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:25:28,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010864176] [2024-06-14 13:25:28,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:28,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:25:28,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:28,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:25:28,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:25:28,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:25:28,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 560 flow. Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 13:25:28,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:28,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:25:28,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:30,904 INFO L124 PetriNetUnfolderBase]: 8899/12292 cut-off events. [2024-06-14 13:25:30,904 INFO L125 PetriNetUnfolderBase]: For 70615/70615 co-relation queries the response was YES. [2024-06-14 13:25:30,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49041 conditions, 12292 events. 8899/12292 cut-off events. For 70615/70615 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 63835 event pairs, 3958 based on Foata normal form. 8/12296 useless extension candidates. Maximal degree in co-relation 49010. Up to 12115 conditions per place. [2024-06-14 13:25:30,967 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 104 selfloop transitions, 20 changer transitions 0/129 dead transitions. [2024-06-14 13:25:30,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 129 transitions, 1048 flow [2024-06-14 13:25:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:25:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:25:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 13:25:30,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339622641509434 [2024-06-14 13:25:30,970 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 560 flow. Second operand 6 states and 138 transitions. [2024-06-14 13:25:30,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 129 transitions, 1048 flow [2024-06-14 13:25:31,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 129 transitions, 971 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:25:31,019 INFO L231 Difference]: Finished difference. Result has 84 places, 97 transitions, 689 flow [2024-06-14 13:25:31,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=689, PETRI_PLACES=84, PETRI_TRANSITIONS=97} [2024-06-14 13:25:31,020 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 28 predicate places. [2024-06-14 13:25:31,020 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 689 flow [2024-06-14 13:25:31,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 7 states have internal predecessors, (79), 0 states have call successors, (0), 0 states 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 13:25:31,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:31,021 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 13:25:31,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:25:31,021 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:31,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:31,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1105290291, now seen corresponding path program 1 times [2024-06-14 13:25:31,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:31,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711620828] [2024-06-14 13:25:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:31,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:33,646 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 13:25:33,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:33,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711620828] [2024-06-14 13:25:33,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711620828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:33,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:33,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:25:33,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337129596] [2024-06-14 13:25:33,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:33,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:25:33,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:33,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:25:33,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:25:33,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:33,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 689 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 13:25:33,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:33,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:33,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:36,240 INFO L124 PetriNetUnfolderBase]: 8498/11898 cut-off events. [2024-06-14 13:25:36,240 INFO L125 PetriNetUnfolderBase]: For 86871/86880 co-relation queries the response was YES. [2024-06-14 13:25:36,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51456 conditions, 11898 events. 8498/11898 cut-off events. For 86871/86880 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 62722 event pairs, 3651 based on Foata normal form. 14/11903 useless extension candidates. Maximal degree in co-relation 51422. Up to 11454 conditions per place. [2024-06-14 13:25:36,322 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 107 selfloop transitions, 24 changer transitions 0/140 dead transitions. [2024-06-14 13:25:36,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 140 transitions, 1173 flow [2024-06-14 13:25:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:25:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:25:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 13:25:36,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-06-14 13:25:36,325 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 689 flow. Second operand 6 states and 142 transitions. [2024-06-14 13:25:36,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 140 transitions, 1173 flow [2024-06-14 13:25:36,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 140 transitions, 1147 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-14 13:25:36,442 INFO L231 Difference]: Finished difference. Result has 90 places, 109 transitions, 849 flow [2024-06-14 13:25:36,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=849, PETRI_PLACES=90, PETRI_TRANSITIONS=109} [2024-06-14 13:25:36,443 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-06-14 13:25:36,444 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 109 transitions, 849 flow [2024-06-14 13:25:36,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 13:25:36,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:36,445 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 13:25:36,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:25:36,445 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:36,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:36,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1496659435, now seen corresponding path program 2 times [2024-06-14 13:25:36,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:36,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701160557] [2024-06-14 13:25:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:39,104 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 13:25:39,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:39,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701160557] [2024-06-14 13:25:39,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701160557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:39,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:39,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:25:39,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633897372] [2024-06-14 13:25:39,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:39,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:25:39,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:39,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:25:39,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:25:39,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:25:39,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 109 transitions, 849 flow. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 13:25:39,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:39,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:25:39,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:41,602 INFO L124 PetriNetUnfolderBase]: 8517/11909 cut-off events. [2024-06-14 13:25:41,602 INFO L125 PetriNetUnfolderBase]: For 102085/102085 co-relation queries the response was YES. [2024-06-14 13:25:41,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54531 conditions, 11909 events. 8517/11909 cut-off events. For 102085/102085 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 62661 event pairs, 3900 based on Foata normal form. 12/11910 useless extension candidates. Maximal degree in co-relation 54493. Up to 11550 conditions per place. [2024-06-14 13:25:41,809 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 100 selfloop transitions, 28 changer transitions 0/137 dead transitions. [2024-06-14 13:25:41,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 137 transitions, 1213 flow [2024-06-14 13:25:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:25:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:25:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 13:25:41,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276729559748428 [2024-06-14 13:25:41,811 INFO L175 Difference]: Start difference. First operand has 90 places, 109 transitions, 849 flow. Second operand 6 states and 136 transitions. [2024-06-14 13:25:41,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 137 transitions, 1213 flow [2024-06-14 13:25:41,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 137 transitions, 1149 flow, removed 31 selfloop flow, removed 1 redundant places. [2024-06-14 13:25:41,924 INFO L231 Difference]: Finished difference. Result has 95 places, 113 transitions, 914 flow [2024-06-14 13:25:41,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=914, PETRI_PLACES=95, PETRI_TRANSITIONS=113} [2024-06-14 13:25:41,925 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 39 predicate places. [2024-06-14 13:25:41,925 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 113 transitions, 914 flow [2024-06-14 13:25:41,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 13:25:41,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:41,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:41,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:25:41,925 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:41,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:41,926 INFO L85 PathProgramCache]: Analyzing trace with hash 40645544, now seen corresponding path program 1 times [2024-06-14 13:25:41,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:41,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469381556] [2024-06-14 13:25:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:41,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:44,885 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 13:25:44,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:44,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469381556] [2024-06-14 13:25:44,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469381556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:44,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:44,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:44,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489387841] [2024-06-14 13:25:44,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:44,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:44,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:44,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:25:44,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 113 transitions, 914 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 13:25:44,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:44,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:25:44,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:48,109 INFO L124 PetriNetUnfolderBase]: 9317/12850 cut-off events. [2024-06-14 13:25:48,109 INFO L125 PetriNetUnfolderBase]: For 117347/117347 co-relation queries the response was YES. [2024-06-14 13:25:48,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60637 conditions, 12850 events. 9317/12850 cut-off events. For 117347/117347 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 66731 event pairs, 3881 based on Foata normal form. 16/12855 useless extension candidates. Maximal degree in co-relation 60596. Up to 12337 conditions per place. [2024-06-14 13:25:48,203 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 111 selfloop transitions, 48 changer transitions 0/164 dead transitions. [2024-06-14 13:25:48,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 164 transitions, 1528 flow [2024-06-14 13:25:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:25:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:25:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:25:48,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41037735849056606 [2024-06-14 13:25:48,205 INFO L175 Difference]: Start difference. First operand has 95 places, 113 transitions, 914 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:25:48,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 164 transitions, 1528 flow [2024-06-14 13:25:48,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 164 transitions, 1437 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:25:48,332 INFO L231 Difference]: Finished difference. Result has 101 places, 129 transitions, 1134 flow [2024-06-14 13:25:48,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=823, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1134, PETRI_PLACES=101, PETRI_TRANSITIONS=129} [2024-06-14 13:25:48,333 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-14 13:25:48,333 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 129 transitions, 1134 flow [2024-06-14 13:25:48,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 13:25:48,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:48,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:48,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:25:48,334 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:48,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:48,334 INFO L85 PathProgramCache]: Analyzing trace with hash 52073384, now seen corresponding path program 2 times [2024-06-14 13:25:48,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:48,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77568218] [2024-06-14 13:25:48,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:48,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:51,342 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 13:25:51,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77568218] [2024-06-14 13:25:51,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77568218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:51,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:51,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816990715] [2024-06-14 13:25:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:51,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:51,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:51,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:51,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:51,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:25:51,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 129 transitions, 1134 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 13:25:51,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:51,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:25:51,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:25:54,584 INFO L124 PetriNetUnfolderBase]: 9457/13058 cut-off events. [2024-06-14 13:25:54,584 INFO L125 PetriNetUnfolderBase]: For 140588/140588 co-relation queries the response was YES. [2024-06-14 13:25:54,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65958 conditions, 13058 events. 9457/13058 cut-off events. For 140588/140588 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 68150 event pairs, 3891 based on Foata normal form. 16/13063 useless extension candidates. Maximal degree in co-relation 65914. Up to 12205 conditions per place. [2024-06-14 13:25:54,688 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 124 selfloop transitions, 60 changer transitions 0/189 dead transitions. [2024-06-14 13:25:54,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 189 transitions, 1906 flow [2024-06-14 13:25:54,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:25:54,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:25:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:25:54,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-06-14 13:25:54,694 INFO L175 Difference]: Start difference. First operand has 101 places, 129 transitions, 1134 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:25:54,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 189 transitions, 1906 flow [2024-06-14 13:25:54,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 189 transitions, 1830 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 13:25:54,843 INFO L231 Difference]: Finished difference. Result has 107 places, 147 transitions, 1465 flow [2024-06-14 13:25:54,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1465, PETRI_PLACES=107, PETRI_TRANSITIONS=147} [2024-06-14 13:25:54,844 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-14 13:25:54,844 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 147 transitions, 1465 flow [2024-06-14 13:25:54,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 13:25:54,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:25:54,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:25:54,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:25:54,845 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:25:54,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:25:54,845 INFO L85 PathProgramCache]: Analyzing trace with hash -819644866, now seen corresponding path program 1 times [2024-06-14 13:25:54,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:25:54,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316103423] [2024-06-14 13:25:54,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:25:54,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:25:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:25:57,912 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 13:25:57,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:25:57,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316103423] [2024-06-14 13:25:57,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316103423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:25:57,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:25:57,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:25:57,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704298207] [2024-06-14 13:25:57,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:25:57,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:25:57,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:25:57,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:25:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:25:57,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:25:57,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 147 transitions, 1465 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 13:25:57,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:25:57,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:25:57,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:01,043 INFO L124 PetriNetUnfolderBase]: 9745/13414 cut-off events. [2024-06-14 13:26:01,044 INFO L125 PetriNetUnfolderBase]: For 155769/155769 co-relation queries the response was YES. [2024-06-14 13:26:01,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71002 conditions, 13414 events. 9745/13414 cut-off events. For 155769/155769 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 69522 event pairs, 3831 based on Foata normal form. 16/13423 useless extension candidates. Maximal degree in co-relation 70954. Up to 12669 conditions per place. [2024-06-14 13:26:01,150 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 180 selfloop transitions, 37 changer transitions 0/222 dead transitions. [2024-06-14 13:26:01,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 222 transitions, 2406 flow [2024-06-14 13:26:01,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:01,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:26:01,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46630727762803237 [2024-06-14 13:26:01,152 INFO L175 Difference]: Start difference. First operand has 107 places, 147 transitions, 1465 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:26:01,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 222 transitions, 2406 flow [2024-06-14 13:26:01,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 222 transitions, 2314 flow, removed 45 selfloop flow, removed 1 redundant places. [2024-06-14 13:26:01,315 INFO L231 Difference]: Finished difference. Result has 115 places, 167 transitions, 1705 flow [2024-06-14 13:26:01,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1705, PETRI_PLACES=115, PETRI_TRANSITIONS=167} [2024-06-14 13:26:01,321 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-14 13:26:01,321 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 167 transitions, 1705 flow [2024-06-14 13:26:01,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 13:26:01,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:01,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:01,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:26:01,322 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:01,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:01,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1380085114, now seen corresponding path program 2 times [2024-06-14 13:26:01,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:01,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032961249] [2024-06-14 13:26:01,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:01,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:04,499 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 13:26:04,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:04,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032961249] [2024-06-14 13:26:04,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032961249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:04,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:04,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:04,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360106144] [2024-06-14 13:26:04,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:04,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:04,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:04,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:04,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:04,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:26:04,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 167 transitions, 1705 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 13:26:04,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:04,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:26:04,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:07,450 INFO L124 PetriNetUnfolderBase]: 9901/13616 cut-off events. [2024-06-14 13:26:07,450 INFO L125 PetriNetUnfolderBase]: For 164979/164979 co-relation queries the response was YES. [2024-06-14 13:26:07,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72961 conditions, 13616 events. 9901/13616 cut-off events. For 164979/164979 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 70446 event pairs, 3961 based on Foata normal form. 16/13628 useless extension candidates. Maximal degree in co-relation 72908. Up to 13081 conditions per place. [2024-06-14 13:26:07,560 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 186 selfloop transitions, 31 changer transitions 0/222 dead transitions. [2024-06-14 13:26:07,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 222 transitions, 2526 flow [2024-06-14 13:26:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:07,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:07,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:26:07,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420485175202156 [2024-06-14 13:26:07,570 INFO L175 Difference]: Start difference. First operand has 115 places, 167 transitions, 1705 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:26:07,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 222 transitions, 2526 flow [2024-06-14 13:26:07,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 222 transitions, 2424 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-14 13:26:07,770 INFO L231 Difference]: Finished difference. Result has 121 places, 177 transitions, 1814 flow [2024-06-14 13:26:07,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1814, PETRI_PLACES=121, PETRI_TRANSITIONS=177} [2024-06-14 13:26:07,771 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 65 predicate places. [2024-06-14 13:26:07,771 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 177 transitions, 1814 flow [2024-06-14 13:26:07,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 13:26:07,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:07,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:07,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:26:07,771 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:07,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:07,772 INFO L85 PathProgramCache]: Analyzing trace with hash 52079336, now seen corresponding path program 3 times [2024-06-14 13:26:07,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:07,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414894214] [2024-06-14 13:26:07,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:07,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:10,810 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 13:26:10,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:10,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414894214] [2024-06-14 13:26:10,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414894214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:10,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:10,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:10,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400071099] [2024-06-14 13:26:10,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:10,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:10,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:10,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:10,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:26:10,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 177 transitions, 1814 flow. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 13:26:10,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:10,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:26:10,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:14,125 INFO L124 PetriNetUnfolderBase]: 9953/13684 cut-off events. [2024-06-14 13:26:14,125 INFO L125 PetriNetUnfolderBase]: For 181170/181170 co-relation queries the response was YES. [2024-06-14 13:26:14,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74790 conditions, 13684 events. 9953/13684 cut-off events. For 181170/181170 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 70862 event pairs, 3937 based on Foata normal form. 16/13696 useless extension candidates. Maximal degree in co-relation 74734. Up to 13125 conditions per place. [2024-06-14 13:26:14,239 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 196 selfloop transitions, 39 changer transitions 0/240 dead transitions. [2024-06-14 13:26:14,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 240 transitions, 2606 flow [2024-06-14 13:26:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:26:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:26:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 13:26:14,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43186582809224316 [2024-06-14 13:26:14,241 INFO L175 Difference]: Start difference. First operand has 121 places, 177 transitions, 1814 flow. Second operand 9 states and 206 transitions. [2024-06-14 13:26:14,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 240 transitions, 2606 flow [2024-06-14 13:26:14,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 240 transitions, 2544 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:14,459 INFO L231 Difference]: Finished difference. Result has 127 places, 182 transitions, 1914 flow [2024-06-14 13:26:14,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1914, PETRI_PLACES=127, PETRI_TRANSITIONS=182} [2024-06-14 13:26:14,460 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-14 13:26:14,460 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 182 transitions, 1914 flow [2024-06-14 13:26:14,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 8 states have internal predecessors, (89), 0 states have call successors, (0), 0 states 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 13:26:14,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:14,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:14,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:26:14,461 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:14,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash -813923010, now seen corresponding path program 1 times [2024-06-14 13:26:14,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:14,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621204378] [2024-06-14 13:26:14,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:14,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:18,193 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 13:26:18,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:18,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621204378] [2024-06-14 13:26:18,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621204378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:18,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:18,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:18,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48781435] [2024-06-14 13:26:18,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:18,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:18,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:18,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:18,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:18,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:26:18,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 182 transitions, 1914 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:18,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:18,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:26:18,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:21,615 INFO L124 PetriNetUnfolderBase]: 10037/13800 cut-off events. [2024-06-14 13:26:21,615 INFO L125 PetriNetUnfolderBase]: For 196346/196346 co-relation queries the response was YES. [2024-06-14 13:26:21,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76786 conditions, 13800 events. 10037/13800 cut-off events. For 196346/196346 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 71518 event pairs, 3973 based on Foata normal form. 16/13812 useless extension candidates. Maximal degree in co-relation 76728. Up to 13503 conditions per place. [2024-06-14 13:26:21,704 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 198 selfloop transitions, 25 changer transitions 0/228 dead transitions. [2024-06-14 13:26:21,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 228 transitions, 2608 flow [2024-06-14 13:26:21,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 13:26:21,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339622641509434 [2024-06-14 13:26:21,706 INFO L175 Difference]: Start difference. First operand has 127 places, 182 transitions, 1914 flow. Second operand 7 states and 161 transitions. [2024-06-14 13:26:21,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 228 transitions, 2608 flow [2024-06-14 13:26:21,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 228 transitions, 2502 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:21,916 INFO L231 Difference]: Finished difference. Result has 128 places, 185 transitions, 1925 flow [2024-06-14 13:26:21,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1925, PETRI_PLACES=128, PETRI_TRANSITIONS=185} [2024-06-14 13:26:21,916 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-14 13:26:21,916 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 185 transitions, 1925 flow [2024-06-14 13:26:21,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:21,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:21,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:21,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:26:21,917 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:21,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:21,918 INFO L85 PathProgramCache]: Analyzing trace with hash 360691584, now seen corresponding path program 1 times [2024-06-14 13:26:21,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:21,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706688988] [2024-06-14 13:26:21,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:21,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:25,845 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 13:26:25,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:25,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706688988] [2024-06-14 13:26:25,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706688988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:25,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:25,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:25,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208019003] [2024-06-14 13:26:25,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:25,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:25,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:25,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:25,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:25,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:26:25,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 185 transitions, 1925 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:25,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:25,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:26:25,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:29,349 INFO L124 PetriNetUnfolderBase]: 9641/13391 cut-off events. [2024-06-14 13:26:29,350 INFO L125 PetriNetUnfolderBase]: For 219170/219268 co-relation queries the response was YES. [2024-06-14 13:26:29,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75986 conditions, 13391 events. 9641/13391 cut-off events. For 219170/219268 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 70365 event pairs, 3502 based on Foata normal form. 30/13363 useless extension candidates. Maximal degree in co-relation 75926. Up to 12529 conditions per place. [2024-06-14 13:26:29,455 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 177 selfloop transitions, 37 changer transitions 0/232 dead transitions. [2024-06-14 13:26:29,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 232 transitions, 2635 flow [2024-06-14 13:26:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:29,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:26:29,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444743935309973 [2024-06-14 13:26:29,458 INFO L175 Difference]: Start difference. First operand has 128 places, 185 transitions, 1925 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:26:29,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 232 transitions, 2635 flow [2024-06-14 13:26:29,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 232 transitions, 2552 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:29,692 INFO L231 Difference]: Finished difference. Result has 130 places, 191 transitions, 2042 flow [2024-06-14 13:26:29,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2042, PETRI_PLACES=130, PETRI_TRANSITIONS=191} [2024-06-14 13:26:29,692 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-14 13:26:29,693 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 191 transitions, 2042 flow [2024-06-14 13:26:29,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:29,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:29,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:29,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:26:29,693 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:29,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:29,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1081452860, now seen corresponding path program 2 times [2024-06-14 13:26:29,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:29,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564284122] [2024-06-14 13:26:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:29,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:33,276 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 13:26:33,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:33,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564284122] [2024-06-14 13:26:33,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564284122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:33,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:33,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:33,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302156506] [2024-06-14 13:26:33,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:33,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:33,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:33,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:33,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:33,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:26:33,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 191 transitions, 2042 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:33,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:33,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:26:33,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:36,848 INFO L124 PetriNetUnfolderBase]: 9687/13461 cut-off events. [2024-06-14 13:26:36,848 INFO L125 PetriNetUnfolderBase]: For 242222/242320 co-relation queries the response was YES. [2024-06-14 13:26:36,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78588 conditions, 13461 events. 9687/13461 cut-off events. For 242222/242320 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 70814 event pairs, 3740 based on Foata normal form. 30/13433 useless extension candidates. Maximal degree in co-relation 78527. Up to 12761 conditions per place. [2024-06-14 13:26:36,957 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 178 selfloop transitions, 33 changer transitions 0/229 dead transitions. [2024-06-14 13:26:36,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 229 transitions, 2610 flow [2024-06-14 13:26:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:26:36,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:26:36,960 INFO L175 Difference]: Start difference. First operand has 130 places, 191 transitions, 2042 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:26:36,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 229 transitions, 2610 flow [2024-06-14 13:26:37,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 229 transitions, 2505 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:37,334 INFO L231 Difference]: Finished difference. Result has 134 places, 194 transitions, 2080 flow [2024-06-14 13:26:37,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1949, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2080, PETRI_PLACES=134, PETRI_TRANSITIONS=194} [2024-06-14 13:26:37,334 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 78 predicate places. [2024-06-14 13:26:37,334 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 194 transitions, 2080 flow [2024-06-14 13:26:37,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:37,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:37,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:37,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:26:37,335 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:37,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:37,335 INFO L85 PathProgramCache]: Analyzing trace with hash 524376372, now seen corresponding path program 3 times [2024-06-14 13:26:37,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:37,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722791354] [2024-06-14 13:26:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:37,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:37,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:41,185 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 13:26:41,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:41,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722791354] [2024-06-14 13:26:41,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722791354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:41,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:41,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:41,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511431821] [2024-06-14 13:26:41,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:41,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:41,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:41,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:41,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:41,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 53 [2024-06-14 13:26:41,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 194 transitions, 2080 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:41,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:41,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 53 [2024-06-14 13:26:41,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:44,262 INFO L124 PetriNetUnfolderBase]: 9810/13624 cut-off events. [2024-06-14 13:26:44,262 INFO L125 PetriNetUnfolderBase]: For 263507/263584 co-relation queries the response was YES. [2024-06-14 13:26:44,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80227 conditions, 13624 events. 9810/13624 cut-off events. For 263507/263584 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 71788 event pairs, 4043 based on Foata normal form. 36/13600 useless extension candidates. Maximal degree in co-relation 80164. Up to 12861 conditions per place. [2024-06-14 13:26:44,381 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 177 selfloop transitions, 35 changer transitions 0/230 dead transitions. [2024-06-14 13:26:44,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 230 transitions, 2660 flow [2024-06-14 13:26:44,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:26:44,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 13:26:44,383 INFO L175 Difference]: Start difference. First operand has 134 places, 194 transitions, 2080 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:26:44,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 230 transitions, 2660 flow [2024-06-14 13:26:44,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 230 transitions, 2533 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:44,796 INFO L231 Difference]: Finished difference. Result has 136 places, 196 transitions, 2094 flow [2024-06-14 13:26:44,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2094, PETRI_PLACES=136, PETRI_TRANSITIONS=196} [2024-06-14 13:26:44,804 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 80 predicate places. [2024-06-14 13:26:44,804 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 196 transitions, 2094 flow [2024-06-14 13:26:44,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:44,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:44,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:44,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:26:44,805 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:44,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:44,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2067522701, now seen corresponding path program 1 times [2024-06-14 13:26:44,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:44,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444843547] [2024-06-14 13:26:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:44,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:46,436 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 13:26:46,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:46,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444843547] [2024-06-14 13:26:46,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444843547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:46,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:46,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:26:46,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748696538] [2024-06-14 13:26:46,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:46,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:26:46,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:46,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:26:46,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:26:46,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:26:46,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 196 transitions, 2094 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 13:26:46,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:46,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:26:46,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:49,585 INFO L124 PetriNetUnfolderBase]: 10281/14148 cut-off events. [2024-06-14 13:26:49,585 INFO L125 PetriNetUnfolderBase]: For 271211/271211 co-relation queries the response was YES. [2024-06-14 13:26:49,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84460 conditions, 14148 events. 10281/14148 cut-off events. For 271211/271211 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 73951 event pairs, 4066 based on Foata normal form. 2/14146 useless extension candidates. Maximal degree in co-relation 84396. Up to 14036 conditions per place. [2024-06-14 13:26:49,717 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 197 selfloop transitions, 10 changer transitions 0/212 dead transitions. [2024-06-14 13:26:49,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 212 transitions, 2560 flow [2024-06-14 13:26:49,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:26:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:26:49,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-14 13:26:49,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39622641509433965 [2024-06-14 13:26:49,718 INFO L175 Difference]: Start difference. First operand has 136 places, 196 transitions, 2094 flow. Second operand 5 states and 105 transitions. [2024-06-14 13:26:49,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 212 transitions, 2560 flow [2024-06-14 13:26:50,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 212 transitions, 2443 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:50,130 INFO L231 Difference]: Finished difference. Result has 137 places, 197 transitions, 2027 flow [2024-06-14 13:26:50,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2027, PETRI_PLACES=137, PETRI_TRANSITIONS=197} [2024-06-14 13:26:50,130 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 81 predicate places. [2024-06-14 13:26:50,131 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 197 transitions, 2027 flow [2024-06-14 13:26:50,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states 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 13:26:50,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:50,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:50,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:26:50,131 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:50,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:50,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1354365598, now seen corresponding path program 1 times [2024-06-14 13:26:50,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:50,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413924742] [2024-06-14 13:26:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:50,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:53,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:53,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413924742] [2024-06-14 13:26:53,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413924742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:53,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:53,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:53,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520483221] [2024-06-14 13:26:53,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:53,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:53,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:53,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:53,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:54,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:26:54,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 197 transitions, 2027 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:54,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:54,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:26:54,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:57,436 INFO L124 PetriNetUnfolderBase]: 10313/14189 cut-off events. [2024-06-14 13:26:57,436 INFO L125 PetriNetUnfolderBase]: For 283728/283749 co-relation queries the response was YES. [2024-06-14 13:26:57,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84841 conditions, 14189 events. 10313/14189 cut-off events. For 283728/283749 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 74112 event pairs, 3485 based on Foata normal form. 18/14193 useless extension candidates. Maximal degree in co-relation 84775. Up to 13877 conditions per place. [2024-06-14 13:26:57,560 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 202 selfloop transitions, 27 changer transitions 0/234 dead transitions. [2024-06-14 13:26:57,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 234 transitions, 2789 flow [2024-06-14 13:26:57,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:26:57,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4308176100628931 [2024-06-14 13:26:57,563 INFO L175 Difference]: Start difference. First operand has 137 places, 197 transitions, 2027 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:26:57,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 234 transitions, 2789 flow [2024-06-14 13:26:58,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 234 transitions, 2757 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:26:58,041 INFO L231 Difference]: Finished difference. Result has 139 places, 203 transitions, 2207 flow [2024-06-14 13:26:58,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2207, PETRI_PLACES=139, PETRI_TRANSITIONS=203} [2024-06-14 13:26:58,042 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-14 13:26:58,042 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 203 transitions, 2207 flow [2024-06-14 13:26:58,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:58,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:58,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:58,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:26:58,043 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:26:58,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:58,043 INFO L85 PathProgramCache]: Analyzing trace with hash 515404, now seen corresponding path program 2 times [2024-06-14 13:26:58,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:58,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997558772] [2024-06-14 13:26:58,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:58,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:01,889 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 13:27:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997558772] [2024-06-14 13:27:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997558772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:01,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:01,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:01,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634901084] [2024-06-14 13:27:01,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:01,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:01,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:27:01,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 203 transitions, 2207 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:01,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:01,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:27:01,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:05,083 INFO L124 PetriNetUnfolderBase]: 10301/14172 cut-off events. [2024-06-14 13:27:05,083 INFO L125 PetriNetUnfolderBase]: For 307623/307623 co-relation queries the response was YES. [2024-06-14 13:27:05,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86664 conditions, 14172 events. 10301/14172 cut-off events. For 307623/307623 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 74248 event pairs, 4066 based on Foata normal form. 4/14165 useless extension candidates. Maximal degree in co-relation 86598. Up to 13949 conditions per place. [2024-06-14 13:27:05,411 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 198 selfloop transitions, 24 changer transitions 0/227 dead transitions. [2024-06-14 13:27:05,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 227 transitions, 2709 flow [2024-06-14 13:27:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:27:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:27:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-06-14 13:27:05,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119496855345912 [2024-06-14 13:27:05,415 INFO L175 Difference]: Start difference. First operand has 139 places, 203 transitions, 2207 flow. Second operand 6 states and 131 transitions. [2024-06-14 13:27:05,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 227 transitions, 2709 flow [2024-06-14 13:27:05,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 227 transitions, 2564 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-14 13:27:05,821 INFO L231 Difference]: Finished difference. Result has 143 places, 203 transitions, 2118 flow [2024-06-14 13:27:05,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2118, PETRI_PLACES=143, PETRI_TRANSITIONS=203} [2024-06-14 13:27:05,821 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-14 13:27:05,821 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 203 transitions, 2118 flow [2024-06-14 13:27:05,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:05,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:05,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:05,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:27:05,822 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:27:05,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:05,823 INFO L85 PathProgramCache]: Analyzing trace with hash 378738138, now seen corresponding path program 1 times [2024-06-14 13:27:05,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:05,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018401619] [2024-06-14 13:27:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:05,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:05,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018401619] [2024-06-14 13:27:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018401619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:09,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721729702] [2024-06-14 13:27:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:09,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:09,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:09,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:27:09,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 203 transitions, 2118 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:09,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:09,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:27:09,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:13,274 INFO L124 PetriNetUnfolderBase]: 10339/14225 cut-off events. [2024-06-14 13:27:13,274 INFO L125 PetriNetUnfolderBase]: For 326835/326856 co-relation queries the response was YES. [2024-06-14 13:27:13,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87601 conditions, 14225 events. 10339/14225 cut-off events. For 326835/326856 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 74521 event pairs, 3607 based on Foata normal form. 18/14229 useless extension candidates. Maximal degree in co-relation 87533. Up to 13713 conditions per place. [2024-06-14 13:27:13,388 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 186 selfloop transitions, 48 changer transitions 0/239 dead transitions. [2024-06-14 13:27:13,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 239 transitions, 2764 flow [2024-06-14 13:27:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:27:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:27:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:27:13,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-06-14 13:27:13,390 INFO L175 Difference]: Start difference. First operand has 143 places, 203 transitions, 2118 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:27:13,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 239 transitions, 2764 flow [2024-06-14 13:27:13,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 239 transitions, 2706 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:13,871 INFO L231 Difference]: Finished difference. Result has 144 places, 207 transitions, 2269 flow [2024-06-14 13:27:13,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2060, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2269, PETRI_PLACES=144, PETRI_TRANSITIONS=207} [2024-06-14 13:27:13,872 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-06-14 13:27:13,872 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 207 transitions, 2269 flow [2024-06-14 13:27:13,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:13,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:13,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:13,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:27:13,873 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:27:13,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:13,873 INFO L85 PathProgramCache]: Analyzing trace with hash 616616226, now seen corresponding path program 2 times [2024-06-14 13:27:13,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:13,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816239939] [2024-06-14 13:27:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:13,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:17,388 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 13:27:17,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:17,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816239939] [2024-06-14 13:27:17,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816239939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:17,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:17,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:17,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356618415] [2024-06-14 13:27:17,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:17,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:17,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:17,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:17,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:27:17,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 207 transitions, 2269 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:17,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:17,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:27:17,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:20,764 INFO L124 PetriNetUnfolderBase]: 10377/14287 cut-off events. [2024-06-14 13:27:20,764 INFO L125 PetriNetUnfolderBase]: For 357694/357715 co-relation queries the response was YES. [2024-06-14 13:27:20,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91010 conditions, 14287 events. 10377/14287 cut-off events. For 357694/357715 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 75019 event pairs, 3625 based on Foata normal form. 18/14291 useless extension candidates. Maximal degree in co-relation 90941. Up to 13641 conditions per place. [2024-06-14 13:27:20,891 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 197 selfloop transitions, 57 changer transitions 0/259 dead transitions. [2024-06-14 13:27:20,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 259 transitions, 3185 flow [2024-06-14 13:27:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:20,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:27:20,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444743935309973 [2024-06-14 13:27:20,893 INFO L175 Difference]: Start difference. First operand has 144 places, 207 transitions, 2269 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:27:20,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 259 transitions, 3185 flow [2024-06-14 13:27:21,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 259 transitions, 3020 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:21,594 INFO L231 Difference]: Finished difference. Result has 146 places, 215 transitions, 2431 flow [2024-06-14 13:27:21,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2431, PETRI_PLACES=146, PETRI_TRANSITIONS=215} [2024-06-14 13:27:21,599 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-14 13:27:21,599 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 215 transitions, 2431 flow [2024-06-14 13:27:21,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:21,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:21,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:21,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:27:21,600 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:27:21,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:21,600 INFO L85 PathProgramCache]: Analyzing trace with hash 109130397, now seen corresponding path program 1 times [2024-06-14 13:27:21,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:21,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771798759] [2024-06-14 13:27:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:21,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:24,933 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 13:27:24,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:24,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771798759] [2024-06-14 13:27:24,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771798759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:24,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:24,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:24,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895039043] [2024-06-14 13:27:24,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:24,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:24,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:24,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:24,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:24,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:27:24,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 215 transitions, 2431 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:24,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:24,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:27:24,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:29,584 INFO L124 PetriNetUnfolderBase]: 10945/15027 cut-off events. [2024-06-14 13:27:29,584 INFO L125 PetriNetUnfolderBase]: For 390504/390534 co-relation queries the response was YES. [2024-06-14 13:27:29,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97288 conditions, 15027 events. 10945/15027 cut-off events. For 390504/390534 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 78665 event pairs, 3517 based on Foata normal form. 36/15054 useless extension candidates. Maximal degree in co-relation 97219. Up to 13426 conditions per place. [2024-06-14 13:27:29,726 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 210 selfloop transitions, 92 changer transitions 0/307 dead transitions. [2024-06-14 13:27:29,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 307 transitions, 3828 flow [2024-06-14 13:27:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:27:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:27:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-14 13:27:29,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439622641509434 [2024-06-14 13:27:29,728 INFO L175 Difference]: Start difference. First operand has 146 places, 215 transitions, 2431 flow. Second operand 10 states and 233 transitions. [2024-06-14 13:27:29,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 307 transitions, 3828 flow [2024-06-14 13:27:30,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 307 transitions, 3662 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:30,498 INFO L231 Difference]: Finished difference. Result has 156 places, 242 transitions, 2903 flow [2024-06-14 13:27:30,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2903, PETRI_PLACES=156, PETRI_TRANSITIONS=242} [2024-06-14 13:27:30,501 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 100 predicate places. [2024-06-14 13:27:30,501 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 242 transitions, 2903 flow [2024-06-14 13:27:30,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:30,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:30,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:30,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:27:30,502 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:27:30,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:30,502 INFO L85 PathProgramCache]: Analyzing trace with hash 833037268, now seen corresponding path program 3 times [2024-06-14 13:27:30,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:30,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121395238] [2024-06-14 13:27:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:30,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:30,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:33,983 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 13:27:33,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:33,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121395238] [2024-06-14 13:27:33,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121395238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:33,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:33,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:33,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334486910] [2024-06-14 13:27:33,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:33,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:33,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:33,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:34,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:27:34,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 242 transitions, 2903 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:34,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:34,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:27:34,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:38,145 INFO L124 PetriNetUnfolderBase]: 10983/15079 cut-off events. [2024-06-14 13:27:38,145 INFO L125 PetriNetUnfolderBase]: For 426594/426615 co-relation queries the response was YES. [2024-06-14 13:27:38,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103659 conditions, 15079 events. 10983/15079 cut-off events. For 426594/426615 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 79208 event pairs, 3683 based on Foata normal form. 18/15083 useless extension candidates. Maximal degree in co-relation 103585. Up to 14407 conditions per place. [2024-06-14 13:27:38,262 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 216 selfloop transitions, 62 changer transitions 0/283 dead transitions. [2024-06-14 13:27:38,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 283 transitions, 3727 flow [2024-06-14 13:27:38,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:38,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:38,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:27:38,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366576819407008 [2024-06-14 13:27:38,265 INFO L175 Difference]: Start difference. First operand has 156 places, 242 transitions, 2903 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:27:38,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 283 transitions, 3727 flow [2024-06-14 13:27:39,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 283 transitions, 3577 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 13:27:39,047 INFO L231 Difference]: Finished difference. Result has 159 places, 246 transitions, 2964 flow [2024-06-14 13:27:39,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2753, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2964, PETRI_PLACES=159, PETRI_TRANSITIONS=246} [2024-06-14 13:27:39,049 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 103 predicate places. [2024-06-14 13:27:39,049 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 246 transitions, 2964 flow [2024-06-14 13:27:39,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:39,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:39,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:39,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:27:39,049 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:27:39,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:39,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1776974727, now seen corresponding path program 2 times [2024-06-14 13:27:39,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:39,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101681722] [2024-06-14 13:27:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:39,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:42,357 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 13:27:42,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:42,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101681722] [2024-06-14 13:27:42,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101681722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:42,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:42,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:42,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902697282] [2024-06-14 13:27:42,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:42,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:42,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:42,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:42,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:42,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:27:42,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 246 transitions, 2964 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:42,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:42,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:27:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:47,145 INFO L124 PetriNetUnfolderBase]: 11805/16130 cut-off events. [2024-06-14 13:27:47,145 INFO L125 PetriNetUnfolderBase]: For 481942/481942 co-relation queries the response was YES. [2024-06-14 13:27:47,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111788 conditions, 16130 events. 11805/16130 cut-off events. For 481942/481942 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 84180 event pairs, 4068 based on Foata normal form. 32/16151 useless extension candidates. Maximal degree in co-relation 111712. Up to 14580 conditions per place. [2024-06-14 13:27:47,293 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 218 selfloop transitions, 94 changer transitions 0/317 dead transitions. [2024-06-14 13:27:47,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 317 transitions, 4291 flow [2024-06-14 13:27:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:47,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-14 13:27:47,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339622641509434 [2024-06-14 13:27:47,295 INFO L175 Difference]: Start difference. First operand has 159 places, 246 transitions, 2964 flow. Second operand 9 states and 207 transitions. [2024-06-14 13:27:47,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 317 transitions, 4291 flow [2024-06-14 13:27:48,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 317 transitions, 4139 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 13:27:48,113 INFO L231 Difference]: Finished difference. Result has 165 places, 267 transitions, 3400 flow [2024-06-14 13:27:48,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3400, PETRI_PLACES=165, PETRI_TRANSITIONS=267} [2024-06-14 13:27:48,136 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 109 predicate places. [2024-06-14 13:27:48,136 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 267 transitions, 3400 flow [2024-06-14 13:27:48,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:48,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:48,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:48,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:27:48,137 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:27:48,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:48,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2039731060, now seen corresponding path program 4 times [2024-06-14 13:27:48,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:48,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104909325] [2024-06-14 13:27:48,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:48,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:48,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:52,295 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 13:27:52,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:52,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104909325] [2024-06-14 13:27:52,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104909325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:52,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:52,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:52,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202980574] [2024-06-14 13:27:52,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:52,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:52,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:52,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:27:52,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 267 transitions, 3400 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:52,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:52,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:27:52,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:56,457 INFO L124 PetriNetUnfolderBase]: 11791/16124 cut-off events. [2024-06-14 13:27:56,457 INFO L125 PetriNetUnfolderBase]: For 520830/520830 co-relation queries the response was YES. [2024-06-14 13:27:56,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117035 conditions, 16124 events. 11791/16124 cut-off events. For 520830/520830 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 84546 event pairs, 4346 based on Foata normal form. 4/16117 useless extension candidates. Maximal degree in co-relation 116957. Up to 15767 conditions per place. [2024-06-14 13:27:56,591 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 254 selfloop transitions, 38 changer transitions 0/297 dead transitions. [2024-06-14 13:27:56,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 297 transitions, 4056 flow [2024-06-14 13:27:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:56,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:56,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 13:27:56,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123989218328841 [2024-06-14 13:27:56,593 INFO L175 Difference]: Start difference. First operand has 165 places, 267 transitions, 3400 flow. Second operand 7 states and 153 transitions. [2024-06-14 13:27:56,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 297 transitions, 4056 flow [2024-06-14 13:27:57,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 297 transitions, 3815 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:57,462 INFO L231 Difference]: Finished difference. Result has 167 places, 267 transitions, 3245 flow [2024-06-14 13:27:57,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3245, PETRI_PLACES=167, PETRI_TRANSITIONS=267} [2024-06-14 13:27:57,463 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-14 13:27:57,463 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 267 transitions, 3245 flow [2024-06-14 13:27:57,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:57,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:57,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:57,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:27:57,464 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:27:57,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash 114844317, now seen corresponding path program 3 times [2024-06-14 13:27:57,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:57,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038683152] [2024-06-14 13:27:57,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:57,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:57,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:00,541 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 13:28:00,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:00,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038683152] [2024-06-14 13:28:00,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038683152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:00,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:00,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512840535] [2024-06-14 13:28:00,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:00,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:00,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:00,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:00,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:00,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:28:00,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 267 transitions, 3245 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:00,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:00,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:28:00,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:05,247 INFO L124 PetriNetUnfolderBase]: 11895/16248 cut-off events. [2024-06-14 13:28:05,247 INFO L125 PetriNetUnfolderBase]: For 536425/536425 co-relation queries the response was YES. [2024-06-14 13:28:05,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116367 conditions, 16248 events. 11895/16248 cut-off events. For 536425/536425 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 84724 event pairs, 4008 based on Foata normal form. 32/16269 useless extension candidates. Maximal degree in co-relation 116287. Up to 14650 conditions per place. [2024-06-14 13:28:05,425 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 223 selfloop transitions, 108 changer transitions 0/336 dead transitions. [2024-06-14 13:28:05,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 336 transitions, 4406 flow [2024-06-14 13:28:05,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:28:05,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:28:05,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-14 13:28:05,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42538593481989706 [2024-06-14 13:28:05,427 INFO L175 Difference]: Start difference. First operand has 167 places, 267 transitions, 3245 flow. Second operand 11 states and 248 transitions. [2024-06-14 13:28:05,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 336 transitions, 4406 flow [2024-06-14 13:28:06,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 336 transitions, 4249 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:06,727 INFO L231 Difference]: Finished difference. Result has 171 places, 276 transitions, 3506 flow [2024-06-14 13:28:06,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3107, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3506, PETRI_PLACES=171, PETRI_TRANSITIONS=276} [2024-06-14 13:28:06,728 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 115 predicate places. [2024-06-14 13:28:06,728 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 276 transitions, 3506 flow [2024-06-14 13:28:06,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:06,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:06,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:06,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:28:06,730 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:28:06,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:06,730 INFO L85 PathProgramCache]: Analyzing trace with hash 980862535, now seen corresponding path program 1 times [2024-06-14 13:28:06,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:06,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572108853] [2024-06-14 13:28:06,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:06,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:11,240 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 13:28:11,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:11,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572108853] [2024-06-14 13:28:11,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572108853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:11,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:11,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:11,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135984263] [2024-06-14 13:28:11,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:11,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:11,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:11,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:11,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:28:11,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 276 transitions, 3506 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:11,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:11,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:28:11,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:16,365 INFO L124 PetriNetUnfolderBase]: 12491/17090 cut-off events. [2024-06-14 13:28:16,365 INFO L125 PetriNetUnfolderBase]: For 544661/544661 co-relation queries the response was YES. [2024-06-14 13:28:16,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121669 conditions, 17090 events. 12491/17090 cut-off events. For 544661/544661 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 90177 event pairs, 4229 based on Foata normal form. 80/17159 useless extension candidates. Maximal degree in co-relation 121588. Up to 15828 conditions per place. [2024-06-14 13:28:16,537 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 259 selfloop transitions, 62 changer transitions 0/326 dead transitions. [2024-06-14 13:28:16,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 326 transitions, 4492 flow [2024-06-14 13:28:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:28:16,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192872117400419 [2024-06-14 13:28:16,539 INFO L175 Difference]: Start difference. First operand has 171 places, 276 transitions, 3506 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:28:16,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 326 transitions, 4492 flow [2024-06-14 13:28:17,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 326 transitions, 4199 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-14 13:28:17,377 INFO L231 Difference]: Finished difference. Result has 172 places, 278 transitions, 3425 flow [2024-06-14 13:28:17,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3219, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3425, PETRI_PLACES=172, PETRI_TRANSITIONS=278} [2024-06-14 13:28:17,377 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-14 13:28:17,377 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 278 transitions, 3425 flow [2024-06-14 13:28:17,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:17,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:17,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:17,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:28:17,378 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:28:17,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:17,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2125392447, now seen corresponding path program 4 times [2024-06-14 13:28:17,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:17,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930409229] [2024-06-14 13:28:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:20,915 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 13:28:20,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:20,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930409229] [2024-06-14 13:28:20,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930409229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:20,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:20,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:20,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508561858] [2024-06-14 13:28:20,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:20,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:20,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:20,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:20,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:28:20,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 278 transitions, 3425 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:20,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:20,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:28:20,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:25,912 INFO L124 PetriNetUnfolderBase]: 12867/17620 cut-off events. [2024-06-14 13:28:25,912 INFO L125 PetriNetUnfolderBase]: For 528673/528691 co-relation queries the response was YES. [2024-06-14 13:28:26,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123892 conditions, 17620 events. 12867/17620 cut-off events. For 528673/528691 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 93793 event pairs, 4051 based on Foata normal form. 24/17633 useless extension candidates. Maximal degree in co-relation 123810. Up to 14816 conditions per place. [2024-06-14 13:28:26,092 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 252 selfloop transitions, 119 changer transitions 0/376 dead transitions. [2024-06-14 13:28:26,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 376 transitions, 5228 flow [2024-06-14 13:28:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:26,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 13:28:26,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-14 13:28:26,108 INFO L175 Difference]: Start difference. First operand has 172 places, 278 transitions, 3425 flow. Second operand 8 states and 200 transitions. [2024-06-14 13:28:26,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 376 transitions, 5228 flow [2024-06-14 13:28:26,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 376 transitions, 5084 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:26,879 INFO L231 Difference]: Finished difference. Result has 176 places, 309 transitions, 4118 flow [2024-06-14 13:28:26,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4118, PETRI_PLACES=176, PETRI_TRANSITIONS=309} [2024-06-14 13:28:26,880 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 120 predicate places. [2024-06-14 13:28:26,880 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 309 transitions, 4118 flow [2024-06-14 13:28:26,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:26,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:26,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:26,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:28:26,881 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:28:26,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash -724758235, now seen corresponding path program 5 times [2024-06-14 13:28:26,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:26,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760516177] [2024-06-14 13:28:26,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:26,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:30,555 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 13:28:30,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:30,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760516177] [2024-06-14 13:28:30,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760516177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:30,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:30,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:30,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963049935] [2024-06-14 13:28:30,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:30,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:30,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:30,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:30,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:30,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:28:30,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 309 transitions, 4118 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:30,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:30,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:28:30,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:35,541 INFO L124 PetriNetUnfolderBase]: 13803/18794 cut-off events. [2024-06-14 13:28:35,542 INFO L125 PetriNetUnfolderBase]: For 621167/621167 co-relation queries the response was YES. [2024-06-14 13:28:35,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140197 conditions, 18794 events. 13803/18794 cut-off events. For 621167/621167 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 99490 event pairs, 4216 based on Foata normal form. 16/18799 useless extension candidates. Maximal degree in co-relation 140111. Up to 15684 conditions per place. [2024-06-14 13:28:35,706 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 245 selfloop transitions, 169 changer transitions 0/419 dead transitions. [2024-06-14 13:28:35,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 419 transitions, 6363 flow [2024-06-14 13:28:35,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:35,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:35,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 13:28:35,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 13:28:35,708 INFO L175 Difference]: Start difference. First operand has 176 places, 309 transitions, 4118 flow. Second operand 10 states and 245 transitions. [2024-06-14 13:28:35,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 419 transitions, 6363 flow [2024-06-14 13:28:36,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 419 transitions, 6181 flow, removed 90 selfloop flow, removed 1 redundant places. [2024-06-14 13:28:36,636 INFO L231 Difference]: Finished difference. Result has 186 places, 347 transitions, 5113 flow [2024-06-14 13:28:36,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5113, PETRI_PLACES=186, PETRI_TRANSITIONS=347} [2024-06-14 13:28:36,637 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 130 predicate places. [2024-06-14 13:28:36,637 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 347 transitions, 5113 flow [2024-06-14 13:28:36,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:36,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:36,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:36,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:28:36,638 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:28:36,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:36,638 INFO L85 PathProgramCache]: Analyzing trace with hash -509263843, now seen corresponding path program 6 times [2024-06-14 13:28:36,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:36,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517539528] [2024-06-14 13:28:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:36,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:40,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:40,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517539528] [2024-06-14 13:28:40,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517539528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:40,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:40,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:40,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371131601] [2024-06-14 13:28:40,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:40,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:40,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:40,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:40,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:40,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:28:40,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 347 transitions, 5113 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:40,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:40,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:28:40,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:45,994 INFO L124 PetriNetUnfolderBase]: 13995/19030 cut-off events. [2024-06-14 13:28:45,995 INFO L125 PetriNetUnfolderBase]: For 676379/676379 co-relation queries the response was YES. [2024-06-14 13:28:46,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146336 conditions, 19030 events. 13995/19030 cut-off events. For 676379/676379 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 100641 event pairs, 4152 based on Foata normal form. 32/19051 useless extension candidates. Maximal degree in co-relation 146246. Up to 15832 conditions per place. [2024-06-14 13:28:46,189 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 251 selfloop transitions, 184 changer transitions 0/440 dead transitions. [2024-06-14 13:28:46,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 440 transitions, 6955 flow [2024-06-14 13:28:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:28:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:28:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-14 13:28:46,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4562607204116638 [2024-06-14 13:28:46,191 INFO L175 Difference]: Start difference. First operand has 186 places, 347 transitions, 5113 flow. Second operand 11 states and 266 transitions. [2024-06-14 13:28:46,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 440 transitions, 6955 flow [2024-06-14 13:28:47,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 440 transitions, 6621 flow, removed 120 selfloop flow, removed 4 redundant places. [2024-06-14 13:28:47,254 INFO L231 Difference]: Finished difference. Result has 193 places, 360 transitions, 5425 flow [2024-06-14 13:28:47,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4821, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5425, PETRI_PLACES=193, PETRI_TRANSITIONS=360} [2024-06-14 13:28:47,255 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 137 predicate places. [2024-06-14 13:28:47,255 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 360 transitions, 5425 flow [2024-06-14 13:28:47,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:47,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:47,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:47,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:28:47,256 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:28:47,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:47,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1691012085, now seen corresponding path program 7 times [2024-06-14 13:28:47,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:47,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573428655] [2024-06-14 13:28:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:47,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:47,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:51,281 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 13:28:51,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:51,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573428655] [2024-06-14 13:28:51,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573428655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:51,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:51,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:51,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423427955] [2024-06-14 13:28:51,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:51,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:51,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:51,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:51,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:51,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:28:51,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 360 transitions, 5425 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:51,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:51,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:28:51,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:56,699 INFO L124 PetriNetUnfolderBase]: 13959/18982 cut-off events. [2024-06-14 13:28:56,699 INFO L125 PetriNetUnfolderBase]: For 669218/669218 co-relation queries the response was YES. [2024-06-14 13:28:56,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145325 conditions, 18982 events. 13959/18982 cut-off events. For 669218/669218 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 100848 event pairs, 4960 based on Foata normal form. 16/18987 useless extension candidates. Maximal degree in co-relation 145233. Up to 18475 conditions per place. [2024-06-14 13:28:56,936 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 354 selfloop transitions, 46 changer transitions 0/405 dead transitions. [2024-06-14 13:28:56,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 405 transitions, 6420 flow [2024-06-14 13:28:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:56,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:28:56,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40670859538784065 [2024-06-14 13:28:56,939 INFO L175 Difference]: Start difference. First operand has 193 places, 360 transitions, 5425 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:28:56,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 405 transitions, 6420 flow [2024-06-14 13:28:58,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 405 transitions, 6026 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:58,112 INFO L231 Difference]: Finished difference. Result has 197 places, 362 transitions, 5176 flow [2024-06-14 13:28:58,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5032, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5176, PETRI_PLACES=197, PETRI_TRANSITIONS=362} [2024-06-14 13:28:58,113 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 141 predicate places. [2024-06-14 13:28:58,113 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 362 transitions, 5176 flow [2024-06-14 13:28:58,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:58,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:58,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:58,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:28:58,113 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:28:58,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:58,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1690626135, now seen corresponding path program 8 times [2024-06-14 13:28:58,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:58,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173475186] [2024-06-14 13:28:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:58,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:02,103 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 13:29:02,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:02,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173475186] [2024-06-14 13:29:02,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173475186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:02,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:02,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:02,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882982123] [2024-06-14 13:29:02,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:02,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:02,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:02,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:02,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:02,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:29:02,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 362 transitions, 5176 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:02,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:02,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:29:02,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:06,744 INFO L124 PetriNetUnfolderBase]: 13923/18940 cut-off events. [2024-06-14 13:29:06,744 INFO L125 PetriNetUnfolderBase]: For 681770/681770 co-relation queries the response was YES. [2024-06-14 13:29:06,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142061 conditions, 18940 events. 13923/18940 cut-off events. For 681770/681770 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 100228 event pairs, 4324 based on Foata normal form. 16/18945 useless extension candidates. Maximal degree in co-relation 141966. Up to 15800 conditions per place. [2024-06-14 13:29:07,022 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 238 selfloop transitions, 170 changer transitions 0/413 dead transitions. [2024-06-14 13:29:07,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 413 transitions, 6385 flow [2024-06-14 13:29:07,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:07,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:29:07,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2024-06-14 13:29:07,037 INFO L175 Difference]: Start difference. First operand has 197 places, 362 transitions, 5176 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:29:07,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 413 transitions, 6385 flow [2024-06-14 13:29:08,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 413 transitions, 6159 flow, removed 75 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:08,604 INFO L231 Difference]: Finished difference. Result has 200 places, 362 transitions, 5300 flow [2024-06-14 13:29:08,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4950, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5300, PETRI_PLACES=200, PETRI_TRANSITIONS=362} [2024-06-14 13:29:08,605 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 144 predicate places. [2024-06-14 13:29:08,605 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 362 transitions, 5300 flow [2024-06-14 13:29:08,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:08,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:08,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:08,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:29:08,606 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:29:08,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:08,606 INFO L85 PathProgramCache]: Analyzing trace with hash 858393173, now seen corresponding path program 2 times [2024-06-14 13:29:08,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:08,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375839326] [2024-06-14 13:29:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:08,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:13,107 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 13:29:13,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:13,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375839326] [2024-06-14 13:29:13,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375839326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:13,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:13,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:13,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881763318] [2024-06-14 13:29:13,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:13,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:13,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:13,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:13,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:13,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:29:13,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 362 transitions, 5300 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:13,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:13,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:29:13,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:18,615 INFO L124 PetriNetUnfolderBase]: 14519/19796 cut-off events. [2024-06-14 13:29:18,616 INFO L125 PetriNetUnfolderBase]: For 770491/770491 co-relation queries the response was YES. [2024-06-14 13:29:18,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149771 conditions, 19796 events. 14519/19796 cut-off events. For 770491/770491 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 105951 event pairs, 4676 based on Foata normal form. 80/19865 useless extension candidates. Maximal degree in co-relation 149675. Up to 18296 conditions per place. [2024-06-14 13:29:18,829 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 335 selfloop transitions, 81 changer transitions 0/421 dead transitions. [2024-06-14 13:29:18,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 421 transitions, 6633 flow [2024-06-14 13:29:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:18,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:29:18,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-14 13:29:18,832 INFO L175 Difference]: Start difference. First operand has 200 places, 362 transitions, 5300 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:29:18,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 421 transitions, 6633 flow [2024-06-14 13:29:19,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 421 transitions, 6283 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:19,989 INFO L231 Difference]: Finished difference. Result has 201 places, 364 transitions, 5197 flow [2024-06-14 13:29:19,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4950, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5197, PETRI_PLACES=201, PETRI_TRANSITIONS=364} [2024-06-14 13:29:20,001 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 145 predicate places. [2024-06-14 13:29:20,001 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 364 transitions, 5197 flow [2024-06-14 13:29:20,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:20,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:20,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:20,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:29:20,002 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:29:20,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:20,003 INFO L85 PathProgramCache]: Analyzing trace with hash -495923427, now seen corresponding path program 3 times [2024-06-14 13:29:20,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:20,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119678257] [2024-06-14 13:29:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:20,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:24,530 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 13:29:24,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:24,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119678257] [2024-06-14 13:29:24,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119678257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:24,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:24,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:24,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738769106] [2024-06-14 13:29:24,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:24,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:24,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:24,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:24,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:24,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:29:24,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 364 transitions, 5197 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:24,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:24,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:29:24,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:30,262 INFO L124 PetriNetUnfolderBase]: 15367/21020 cut-off events. [2024-06-14 13:29:30,263 INFO L125 PetriNetUnfolderBase]: For 833611/833611 co-relation queries the response was YES. [2024-06-14 13:29:30,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158652 conditions, 21020 events. 15367/21020 cut-off events. For 833611/833611 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 114425 event pairs, 4695 based on Foata normal form. 64/21073 useless extension candidates. Maximal degree in co-relation 158555. Up to 17742 conditions per place. [2024-06-14 13:29:30,606 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 338 selfloop transitions, 88 changer transitions 0/431 dead transitions. [2024-06-14 13:29:30,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 431 transitions, 6703 flow [2024-06-14 13:29:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:29:30,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-14 13:29:30,608 INFO L175 Difference]: Start difference. First operand has 201 places, 364 transitions, 5197 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:29:30,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 431 transitions, 6703 flow [2024-06-14 13:29:32,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 431 transitions, 6512 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:32,020 INFO L231 Difference]: Finished difference. Result has 203 places, 367 transitions, 5287 flow [2024-06-14 13:29:32,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5287, PETRI_PLACES=203, PETRI_TRANSITIONS=367} [2024-06-14 13:29:32,020 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 147 predicate places. [2024-06-14 13:29:32,021 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 367 transitions, 5287 flow [2024-06-14 13:29:32,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:32,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:32,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:32,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:29:32,021 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:29:32,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1898236661, now seen corresponding path program 1 times [2024-06-14 13:29:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:32,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270479047] [2024-06-14 13:29:32,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:32,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:35,895 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 13:29:35,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:35,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270479047] [2024-06-14 13:29:35,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270479047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:35,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:35,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336807744] [2024-06-14 13:29:35,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:35,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:35,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:35,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:35,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:35,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:29:35,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 367 transitions, 5287 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:35,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:35,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:29:35,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:42,554 INFO L124 PetriNetUnfolderBase]: 16891/23098 cut-off events. [2024-06-14 13:29:42,554 INFO L125 PetriNetUnfolderBase]: For 964093/964093 co-relation queries the response was YES. [2024-06-14 13:29:42,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174319 conditions, 23098 events. 16891/23098 cut-off events. For 964093/964093 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 127661 event pairs, 5018 based on Foata normal form. 64/23155 useless extension candidates. Maximal degree in co-relation 174221. Up to 19966 conditions per place. [2024-06-14 13:29:42,795 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 406 selfloop transitions, 54 changer transitions 0/465 dead transitions. [2024-06-14 13:29:42,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 465 transitions, 7183 flow [2024-06-14 13:29:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 13:29:42,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-14 13:29:42,797 INFO L175 Difference]: Start difference. First operand has 203 places, 367 transitions, 5287 flow. Second operand 8 states and 211 transitions. [2024-06-14 13:29:42,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 465 transitions, 7183 flow [2024-06-14 13:29:44,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 465 transitions, 7047 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:29:44,669 INFO L231 Difference]: Finished difference. Result has 209 places, 375 transitions, 5453 flow [2024-06-14 13:29:44,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5151, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5453, PETRI_PLACES=209, PETRI_TRANSITIONS=375} [2024-06-14 13:29:44,669 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 153 predicate places. [2024-06-14 13:29:44,669 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 375 transitions, 5453 flow [2024-06-14 13:29:44,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:44,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:44,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:44,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:29:44,670 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:29:44,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:44,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1896358991, now seen corresponding path program 2 times [2024-06-14 13:29:44,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:44,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573427463] [2024-06-14 13:29:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:44,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:49,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:49,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573427463] [2024-06-14 13:29:49,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573427463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:49,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:49,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:49,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000220117] [2024-06-14 13:29:49,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:49,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:49,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:49,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:49,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 53 [2024-06-14 13:29:49,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 375 transitions, 5453 flow. Second operand has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:49,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:49,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 53 [2024-06-14 13:29:49,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:56,203 INFO L124 PetriNetUnfolderBase]: 17487/23934 cut-off events. [2024-06-14 13:29:56,204 INFO L125 PetriNetUnfolderBase]: For 1038772/1038772 co-relation queries the response was YES. [2024-06-14 13:29:56,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182134 conditions, 23934 events. 17487/23934 cut-off events. For 1038772/1038772 co-relation queries the response was YES. Maximal size of possible extension queue 933. Compared 132967 event pairs, 5396 based on Foata normal form. 80/24007 useless extension candidates. Maximal degree in co-relation 182032. Up to 22384 conditions per place. [2024-06-14 13:29:56,575 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 383 selfloop transitions, 53 changer transitions 0/441 dead transitions. [2024-06-14 13:29:56,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 441 transitions, 6839 flow [2024-06-14 13:29:56,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:56,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:56,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:29:56,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-14 13:29:56,577 INFO L175 Difference]: Start difference. First operand has 209 places, 375 transitions, 5453 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:29:56,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 441 transitions, 6839 flow [2024-06-14 13:29:58,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 441 transitions, 6729 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 13:29:58,419 INFO L231 Difference]: Finished difference. Result has 214 places, 377 transitions, 5531 flow [2024-06-14 13:29:58,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5343, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5531, PETRI_PLACES=214, PETRI_TRANSITIONS=377} [2024-06-14 13:29:58,420 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 158 predicate places. [2024-06-14 13:29:58,421 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 377 transitions, 5531 flow [2024-06-14 13:29:58,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.9) internal successors, (109), 10 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:58,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:58,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:58,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:29:58,421 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 13:29:58,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:58,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1813245821, now seen corresponding path program 3 times [2024-06-14 13:29:58,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:58,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585007873] [2024-06-14 13:29:58,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:58,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat