./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix018_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix018_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/mix018_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix018_tso.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:23:12,063 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:23:12,140 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:23:12,145 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:23:12,146 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:23:12,175 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:23:12,176 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:23:12,176 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:23:12,177 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:23:12,181 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:23:12,181 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:23:12,181 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:23:12,182 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:23:12,184 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:23:12,184 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:23:12,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:23:12,185 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:23:12,185 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:23:12,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:23:12,185 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:23:12,186 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:23:12,186 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:23:12,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:23:12,187 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:23:12,187 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:23:12,187 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:23:12,188 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:23:12,188 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:23:12,189 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:23:12,189 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:23:12,190 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:23:12,190 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:23:12,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:23:12,191 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:23:12,191 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:23:12,191 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:23:12,192 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:23:12,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:23:12,192 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:23:12,192 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:23:12,193 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:23:12,193 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:23:12,193 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:23:12,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:23:12,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:23:12,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:23:12,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:23:12,461 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:23:12,462 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:23:12,462 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix018_tso.oepc.i [2024-06-03 19:23:13,596 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:23:13,842 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:23:13,842 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix018_tso.oepc.i [2024-06-03 19:23:13,865 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/986554bb1/cc1c50617ca74c23b0f1f720247dfcbc/FLAGb09f4e24c [2024-06-03 19:23:13,877 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/986554bb1/cc1c50617ca74c23b0f1f720247dfcbc [2024-06-03 19:23:13,879 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:23:13,879 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:23:13,880 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix018_tso.oepc.yml/witness.yml [2024-06-03 19:23:14,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:23:14,151 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:23:14,152 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:23:14,152 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:23:14,156 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:23:14,157 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:23:13" (1/2) ... [2024-06-03 19:23:14,157 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4932f6d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:23:14, skipping insertion in model container [2024-06-03 19:23:14,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:23:13" (1/2) ... [2024-06-03 19:23:14,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@19a616cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:23:14, skipping insertion in model container [2024-06-03 19:23:14,159 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:23:14" (2/2) ... [2024-06-03 19:23:14,159 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4932f6d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14, skipping insertion in model container [2024-06-03 19:23:14,160 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:23:14" (2/2) ... [2024-06-03 19:23:14,160 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:23:14,287 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:23:14,288 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-03 19:23:14,289 INFO L97 edCorrectnessWitness]: Location invariant before [L860-L860] ((((((((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-03 19:23:14,289 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-03 19:23:14,289 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] ((((((((((((((((((((((! multithreaded || x$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || x$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2))) [2024-06-03 19:23:14,289 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:23:14,290 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-03 19:23:14,339 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:23:14,724 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:23:14,735 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:23:14,881 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:23:14,921 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:23:14,922 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14 WrapperNode [2024-06-03 19:23:14,922 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:23:14,922 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:23:14,922 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:23:14,923 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:23:14,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:14,951 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:14,985 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 158 [2024-06-03 19:23:14,986 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:23:14,987 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:23:14,987 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:23:14,987 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:23:14,999 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:14,999 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:15,003 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:15,037 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:23:15,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:15,038 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:15,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:15,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:15,068 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:15,070 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:15,088 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:23:15,089 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:23:15,089 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:23:15,089 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:23:15,090 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (1/1) ... [2024-06-03 19:23:15,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:23:15,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:23:15,121 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) [2024-06-03 19:23:15,144 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 [2024-06-03 19:23:15,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:23:15,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:23:15,162 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:23:15,162 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:23:15,162 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:23:15,163 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:23:15,163 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:23:15,163 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:23:15,163 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:23:15,164 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:23:15,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:23:15,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:23:15,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:23:15,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:23:15,166 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:23:15,342 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:23:15,344 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:23:15,791 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:23:15,791 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:23:16,019 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:23:16,020 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:23:16,020 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:23:16 BoogieIcfgContainer [2024-06-03 19:23:16,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:23:16,024 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:23:16,024 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:23:16,027 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:23:16,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:23:13" (1/4) ... [2024-06-03 19:23:16,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6743c58d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:23:16, skipping insertion in model container [2024-06-03 19:23:16,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:23:14" (2/4) ... [2024-06-03 19:23:16,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6743c58d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:23:16, skipping insertion in model container [2024-06-03 19:23:16,028 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:23:14" (3/4) ... [2024-06-03 19:23:16,028 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6743c58d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:23:16, skipping insertion in model container [2024-06-03 19:23:16,029 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:23:16" (4/4) ... [2024-06-03 19:23:16,030 INFO L112 eAbstractionObserver]: Analyzing ICFG mix018_tso.oepc.i [2024-06-03 19:23:16,046 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:23:16,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:23:16,047 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:23:16,115 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:23:16,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:23:16,192 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-03 19:23:16,192 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:23:16,194 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 89 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. [2024-06-03 19:23:16,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:23:16,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-03 19:23:16,210 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:23:16,218 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;@48ebd571, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:23:16,218 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:23:16,222 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:23:16,222 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:23:16,222 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:23:16,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:16,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:23:16,224 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)] === [2024-06-03 19:23:16,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:16,229 INFO L85 PathProgramCache]: Analyzing trace with hash -440075567, now seen corresponding path program 1 times [2024-06-03 19:23:16,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:16,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142908527] [2024-06-03 19:23:16,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:16,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:17,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:17,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142908527] [2024-06-03 19:23:17,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142908527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:17,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:17,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:23:17,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106509778] [2024-06-03 19:23:17,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:17,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:23:17,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:17,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:23:17,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:23:17,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:17,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:17,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:17,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:17,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:19,641 INFO L124 PetriNetUnfolderBase]: 8192/11829 cut-off events. [2024-06-03 19:23:19,641 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-03 19:23:19,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23394 conditions, 11829 events. 8192/11829 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 67587 event pairs, 6310 based on Foata normal form. 1/11406 useless extension candidates. Maximal degree in co-relation 23378. Up to 11172 conditions per place. [2024-06-03 19:23:19,722 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 44 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-03 19:23:19,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 233 flow [2024-06-03 19:23:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:23:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:23:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-06-03 19:23:19,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-06-03 19:23:19,736 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 95 transitions. [2024-06-03 19:23:19,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 233 flow [2024-06-03 19:23:19,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 226 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:19,741 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-03 19:23:19,743 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} [2024-06-03 19:23:19,746 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-03 19:23:19,746 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-03 19:23:19,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:19,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:19,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:19,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:23:19,747 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)] === [2024-06-03 19:23:19,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:19,748 INFO L85 PathProgramCache]: Analyzing trace with hash -2005809616, now seen corresponding path program 1 times [2024-06-03 19:23:19,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:19,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819318387] [2024-06-03 19:23:19,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:19,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:20,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:20,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819318387] [2024-06-03 19:23:20,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819318387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:20,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:20,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:23:20,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785937249] [2024-06-03 19:23:20,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:20,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:23:20,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:20,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:23:20,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:23:20,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:21,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:21,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:21,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:21,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:22,990 INFO L124 PetriNetUnfolderBase]: 9577/13428 cut-off events. [2024-06-03 19:23:22,991 INFO L125 PetriNetUnfolderBase]: For 2471/2471 co-relation queries the response was YES. [2024-06-03 19:23:23,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30279 conditions, 13428 events. 9577/13428 cut-off events. For 2471/2471 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 74054 event pairs, 6775 based on Foata normal form. 4/13341 useless extension candidates. Maximal degree in co-relation 30264. Up to 12982 conditions per place. [2024-06-03 19:23:23,076 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-03 19:23:23,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-03 19:23:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:23:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:23:23,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-03 19:23:23,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-06-03 19:23:23,082 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 120 transitions. [2024-06-03 19:23:23,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-03 19:23:23,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:23:23,088 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-03 19:23:23,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-03 19:23:23,089 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-03 19:23:23,090 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-03 19:23:23,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:23,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:23,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:23,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:23:23,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:23,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:23,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2050555414, now seen corresponding path program 1 times [2024-06-03 19:23:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:23,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005186883] [2024-06-03 19:23:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:23,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:24,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:24,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005186883] [2024-06-03 19:23:24,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005186883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:24,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:24,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:23:24,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904071078] [2024-06-03 19:23:24,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:24,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:23:24,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:24,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:23:24,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:23:24,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:24,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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) [2024-06-03 19:23:24,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:24,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:24,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:26,017 INFO L124 PetriNetUnfolderBase]: 9557/13398 cut-off events. [2024-06-03 19:23:26,018 INFO L125 PetriNetUnfolderBase]: For 7049/7049 co-relation queries the response was YES. [2024-06-03 19:23:26,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33624 conditions, 13398 events. 9557/13398 cut-off events. For 7049/7049 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 73672 event pairs, 5407 based on Foata normal form. 8/13319 useless extension candidates. Maximal degree in co-relation 33607. Up to 12912 conditions per place. [2024-06-03 19:23:26,113 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 66 selfloop transitions, 13 changer transitions 0/86 dead transitions. [2024-06-03 19:23:26,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 439 flow [2024-06-03 19:23:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:23:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:23:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-03 19:23:26,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584905660377358 [2024-06-03 19:23:26,115 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 5 states and 148 transitions. [2024-06-03 19:23:26,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 439 flow [2024-06-03 19:23:26,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 420 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 19:23:26,120 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 229 flow [2024-06-03 19:23:26,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-06-03 19:23:26,121 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2024-06-03 19:23:26,121 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 229 flow [2024-06-03 19:23:26,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 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) [2024-06-03 19:23:26,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:26,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:26,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:23:26,122 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:26,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:26,123 INFO L85 PathProgramCache]: Analyzing trace with hash 806254249, now seen corresponding path program 1 times [2024-06-03 19:23:26,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:26,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767512071] [2024-06-03 19:23:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:26,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:27,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:27,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767512071] [2024-06-03 19:23:27,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767512071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:27,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:27,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:23:27,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772307781] [2024-06-03 19:23:27,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:27,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:23:27,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:27,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:23:27,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:23:27,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:27,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 229 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:27,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:27,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:27,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:29,486 INFO L124 PetriNetUnfolderBase]: 9541/13368 cut-off events. [2024-06-03 19:23:29,487 INFO L125 PetriNetUnfolderBase]: For 13616/13616 co-relation queries the response was YES. [2024-06-03 19:23:29,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36928 conditions, 13368 events. 9541/13368 cut-off events. For 13616/13616 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 73762 event pairs, 4602 based on Foata normal form. 8/13293 useless extension candidates. Maximal degree in co-relation 36910. Up to 12846 conditions per place. [2024-06-03 19:23:29,577 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 73 selfloop transitions, 16 changer transitions 0/96 dead transitions. [2024-06-03 19:23:29,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 96 transitions, 523 flow [2024-06-03 19:23:29,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:23:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:23:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-03 19:23:29,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-06-03 19:23:29,583 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 229 flow. Second operand 6 states and 171 transitions. [2024-06-03 19:23:29,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 96 transitions, 523 flow [2024-06-03 19:23:29,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 96 transitions, 490 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:29,592 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 260 flow [2024-06-03 19:23:29,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-06-03 19:23:29,594 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-03 19:23:29,594 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 260 flow [2024-06-03 19:23:29,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:29,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:29,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:29,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:23:29,595 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)] === [2024-06-03 19:23:29,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:29,596 INFO L85 PathProgramCache]: Analyzing trace with hash 800820805, now seen corresponding path program 1 times [2024-06-03 19:23:29,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:29,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729059705] [2024-06-03 19:23:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:29,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:30,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:30,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729059705] [2024-06-03 19:23:30,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729059705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:30,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:30,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:23:30,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631607532] [2024-06-03 19:23:30,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:30,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:23:30,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:30,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:23:30,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:23:30,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:30,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 260 flow. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:30,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:30,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:30,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:32,177 INFO L124 PetriNetUnfolderBase]: 8137/11796 cut-off events. [2024-06-03 19:23:32,178 INFO L125 PetriNetUnfolderBase]: For 18131/18131 co-relation queries the response was YES. [2024-06-03 19:23:32,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34669 conditions, 11796 events. 8137/11796 cut-off events. For 18131/18131 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 67657 event pairs, 4690 based on Foata normal form. 3/11596 useless extension candidates. Maximal degree in co-relation 34650. Up to 11079 conditions per place. [2024-06-03 19:23:32,260 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 60 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-03 19:23:32,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 470 flow [2024-06-03 19:23:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:23:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:23:32,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-03 19:23:32,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-03 19:23:32,262 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 260 flow. Second operand 5 states and 127 transitions. [2024-06-03 19:23:32,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 470 flow [2024-06-03 19:23:32,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 424 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:32,269 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 279 flow [2024-06-03 19:23:32,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=279, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-03 19:23:32,272 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-03 19:23:32,273 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 279 flow [2024-06-03 19:23:32,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:32,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:32,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:32,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:23:32,274 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)] === [2024-06-03 19:23:32,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:32,274 INFO L85 PathProgramCache]: Analyzing trace with hash 368405794, now seen corresponding path program 1 times [2024-06-03 19:23:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:32,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235297156] [2024-06-03 19:23:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:32,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:33,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:33,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235297156] [2024-06-03 19:23:33,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235297156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:33,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:33,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:23:33,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459409131] [2024-06-03 19:23:33,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:33,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:23:33,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:33,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:23:33,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:23:33,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:23:33,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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) [2024-06-03 19:23:33,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:33,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:23:33,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:35,145 INFO L124 PetriNetUnfolderBase]: 9554/13418 cut-off events. [2024-06-03 19:23:35,146 INFO L125 PetriNetUnfolderBase]: For 30901/30901 co-relation queries the response was YES. [2024-06-03 19:23:35,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42958 conditions, 13418 events. 9554/13418 cut-off events. For 30901/30901 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 73933 event pairs, 5494 based on Foata normal form. 3/13364 useless extension candidates. Maximal degree in co-relation 42937. Up to 12933 conditions per place. [2024-06-03 19:23:35,238 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 71 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-06-03 19:23:35,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 92 transitions, 551 flow [2024-06-03 19:23:35,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:23:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:23:35,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 19:23:35,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46855345911949686 [2024-06-03 19:23:35,241 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 279 flow. Second operand 6 states and 149 transitions. [2024-06-03 19:23:35,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 92 transitions, 551 flow [2024-06-03 19:23:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 92 transitions, 518 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:35,248 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 325 flow [2024-06-03 19:23:35,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=325, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-03 19:23:35,249 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-03 19:23:35,249 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 325 flow [2024-06-03 19:23:35,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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) [2024-06-03 19:23:35,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:35,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:35,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:23:35,250 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:35,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash 789704164, now seen corresponding path program 2 times [2024-06-03 19:23:35,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:35,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232338377] [2024-06-03 19:23:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:36,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:36,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:36,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232338377] [2024-06-03 19:23:36,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232338377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:36,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:36,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:23:36,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031744410] [2024-06-03 19:23:36,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:36,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:23:36,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:23:36,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:23:36,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:23:36,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 325 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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) [2024-06-03 19:23:36,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:36,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:23:36,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:37,941 INFO L124 PetriNetUnfolderBase]: 9545/13433 cut-off events. [2024-06-03 19:23:37,941 INFO L125 PetriNetUnfolderBase]: For 41824/41836 co-relation queries the response was YES. [2024-06-03 19:23:37,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46266 conditions, 13433 events. 9545/13433 cut-off events. For 41824/41836 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 74277 event pairs, 5476 based on Foata normal form. 15/13391 useless extension candidates. Maximal degree in co-relation 46244. Up to 12891 conditions per place. [2024-06-03 19:23:38,053 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 65 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-03 19:23:38,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 599 flow [2024-06-03 19:23:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:23:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:23:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 19:23:38,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46540880503144655 [2024-06-03 19:23:38,055 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 325 flow. Second operand 6 states and 148 transitions. [2024-06-03 19:23:38,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 599 flow [2024-06-03 19:23:38,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 93 transitions, 552 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:38,065 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 379 flow [2024-06-03 19:23:38,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=379, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-03 19:23:38,067 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-03 19:23:38,067 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 379 flow [2024-06-03 19:23:38,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 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) [2024-06-03 19:23:38,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:38,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:38,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:23:38,068 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)] === [2024-06-03 19:23:38,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:38,069 INFO L85 PathProgramCache]: Analyzing trace with hash 789712100, now seen corresponding path program 1 times [2024-06-03 19:23:38,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:38,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283722603] [2024-06-03 19:23:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:38,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:39,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:39,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283722603] [2024-06-03 19:23:39,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283722603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:39,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:39,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:39,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377038910] [2024-06-03 19:23:39,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:39,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:39,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:39,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:39,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:39,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:23:39,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 379 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:39,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:39,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:23:39,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:41,312 INFO L124 PetriNetUnfolderBase]: 9900/14237 cut-off events. [2024-06-03 19:23:41,313 INFO L125 PetriNetUnfolderBase]: For 54652/54652 co-relation queries the response was YES. [2024-06-03 19:23:41,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51383 conditions, 14237 events. 9900/14237 cut-off events. For 54652/54652 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 81554 event pairs, 5554 based on Foata normal form. 3/13995 useless extension candidates. Maximal degree in co-relation 51360. Up to 13410 conditions per place. [2024-06-03 19:23:41,393 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 83 selfloop transitions, 18 changer transitions 0/108 dead transitions. [2024-06-03 19:23:41,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 722 flow [2024-06-03 19:23:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 19:23:41,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555256064690027 [2024-06-03 19:23:41,396 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 379 flow. Second operand 7 states and 169 transitions. [2024-06-03 19:23:41,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 722 flow [2024-06-03 19:23:41,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 648 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:41,408 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 428 flow [2024-06-03 19:23:41,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=428, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-06-03 19:23:41,410 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 17 predicate places. [2024-06-03 19:23:41,411 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 428 flow [2024-06-03 19:23:41,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:41,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:41,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:41,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:23:41,412 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)] === [2024-06-03 19:23:41,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1967783688, now seen corresponding path program 1 times [2024-06-03 19:23:41,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:41,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117380073] [2024-06-03 19:23:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:41,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:41,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117380073] [2024-06-03 19:23:42,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117380073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:42,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:42,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:42,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449856541] [2024-06-03 19:23:42,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:42,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:42,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:42,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:42,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:42,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:23:42,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 428 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:42,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:42,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:23:42,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:44,483 INFO L124 PetriNetUnfolderBase]: 11376/15897 cut-off events. [2024-06-03 19:23:44,484 INFO L125 PetriNetUnfolderBase]: For 83667/83683 co-relation queries the response was YES. [2024-06-03 19:23:44,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63147 conditions, 15897 events. 11376/15897 cut-off events. For 83667/83683 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 88848 event pairs, 5639 based on Foata normal form. 6/15830 useless extension candidates. Maximal degree in co-relation 63122. Up to 15319 conditions per place. [2024-06-03 19:23:44,580 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 93 selfloop transitions, 22 changer transitions 0/123 dead transitions. [2024-06-03 19:23:44,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 123 transitions, 818 flow [2024-06-03 19:23:44,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 19:23:44,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-03 19:23:44,582 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 428 flow. Second operand 7 states and 177 transitions. [2024-06-03 19:23:44,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 123 transitions, 818 flow [2024-06-03 19:23:44,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 123 transitions, 757 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:44,604 INFO L231 Difference]: Finished difference. Result has 77 places, 85 transitions, 499 flow [2024-06-03 19:23:44,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=499, PETRI_PLACES=77, PETRI_TRANSITIONS=85} [2024-06-03 19:23:44,605 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-03 19:23:44,605 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 85 transitions, 499 flow [2024-06-03 19:23:44,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:44,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:44,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:44,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:23:44,606 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)] === [2024-06-03 19:23:44,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:44,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1967903658, now seen corresponding path program 2 times [2024-06-03 19:23:44,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:44,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369151879] [2024-06-03 19:23:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:44,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:45,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:45,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369151879] [2024-06-03 19:23:45,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369151879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:45,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:45,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:45,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470525825] [2024-06-03 19:23:45,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:45,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:45,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:45,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:45,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:45,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:23:45,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 85 transitions, 499 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:45,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:45,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:23:45,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:47,712 INFO L124 PetriNetUnfolderBase]: 11600/16191 cut-off events. [2024-06-03 19:23:47,713 INFO L125 PetriNetUnfolderBase]: For 108473/108489 co-relation queries the response was YES. [2024-06-03 19:23:47,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69867 conditions, 16191 events. 11600/16191 cut-off events. For 108473/108489 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 90407 event pairs, 5423 based on Foata normal form. 28/16156 useless extension candidates. Maximal degree in co-relation 69840. Up to 15434 conditions per place. [2024-06-03 19:23:47,812 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 95 selfloop transitions, 32 changer transitions 0/135 dead transitions. [2024-06-03 19:23:47,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 135 transitions, 1037 flow [2024-06-03 19:23:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:47,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:47,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 19:23:47,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-03 19:23:47,814 INFO L175 Difference]: Start difference. First operand has 77 places, 85 transitions, 499 flow. Second operand 7 states and 182 transitions. [2024-06-03 19:23:47,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 135 transitions, 1037 flow [2024-06-03 19:23:47,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 135 transitions, 973 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:47,837 INFO L231 Difference]: Finished difference. Result has 82 places, 95 transitions, 657 flow [2024-06-03 19:23:47,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=657, PETRI_PLACES=82, PETRI_TRANSITIONS=95} [2024-06-03 19:23:47,839 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-03 19:23:47,840 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 95 transitions, 657 flow [2024-06-03 19:23:47,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:47,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:47,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:47,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:23:47,841 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)] === [2024-06-03 19:23:47,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:47,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1288972864, now seen corresponding path program 3 times [2024-06-03 19:23:47,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:47,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884060986] [2024-06-03 19:23:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:47,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:49,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:49,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884060986] [2024-06-03 19:23:49,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884060986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:49,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:49,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:49,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684205854] [2024-06-03 19:23:49,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:49,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:49,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:49,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:49,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:23:49,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 95 transitions, 657 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:49,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:49,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:23:49,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:50,876 INFO L124 PetriNetUnfolderBase]: 11638/16232 cut-off events. [2024-06-03 19:23:50,876 INFO L125 PetriNetUnfolderBase]: For 138873/138919 co-relation queries the response was YES. [2024-06-03 19:23:50,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75998 conditions, 16232 events. 11638/16232 cut-off events. For 138873/138919 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90551 event pairs, 5132 based on Foata normal form. 30/16209 useless extension candidates. Maximal degree in co-relation 75969. Up to 15296 conditions per place. [2024-06-03 19:23:50,995 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 87 selfloop transitions, 51 changer transitions 0/146 dead transitions. [2024-06-03 19:23:50,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 146 transitions, 1307 flow [2024-06-03 19:23:50,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-03 19:23:50,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-03 19:23:50,997 INFO L175 Difference]: Start difference. First operand has 82 places, 95 transitions, 657 flow. Second operand 7 states and 187 transitions. [2024-06-03 19:23:50,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 146 transitions, 1307 flow [2024-06-03 19:23:51,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 146 transitions, 1239 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:51,045 INFO L231 Difference]: Finished difference. Result has 87 places, 105 transitions, 866 flow [2024-06-03 19:23:51,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=866, PETRI_PLACES=87, PETRI_TRANSITIONS=105} [2024-06-03 19:23:51,046 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-03 19:23:51,046 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 105 transitions, 866 flow [2024-06-03 19:23:51,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:51,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:51,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:51,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:23:51,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:51,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:51,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1288726600, now seen corresponding path program 1 times [2024-06-03 19:23:51,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:51,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448327856] [2024-06-03 19:23:51,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:51,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:51,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:52,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:52,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448327856] [2024-06-03 19:23:52,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448327856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:52,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:52,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:52,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084851597] [2024-06-03 19:23:52,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:52,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:52,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:52,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:52,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:52,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:23:52,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 105 transitions, 866 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:52,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:52,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:23:52,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:54,485 INFO L124 PetriNetUnfolderBase]: 10292/14612 cut-off events. [2024-06-03 19:23:54,485 INFO L125 PetriNetUnfolderBase]: For 140133/140133 co-relation queries the response was YES. [2024-06-03 19:23:54,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71187 conditions, 14612 events. 10292/14612 cut-off events. For 140133/140133 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 82467 event pairs, 4453 based on Foata normal form. 6/14438 useless extension candidates. Maximal degree in co-relation 71155. Up to 13917 conditions per place. [2024-06-03 19:23:54,586 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 119 selfloop transitions, 21 changer transitions 0/147 dead transitions. [2024-06-03 19:23:54,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 147 transitions, 1302 flow [2024-06-03 19:23:54,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 19:23:54,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-03 19:23:54,589 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 866 flow. Second operand 8 states and 192 transitions. [2024-06-03 19:23:54,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 147 transitions, 1302 flow [2024-06-03 19:23:54,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 147 transitions, 1153 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:54,676 INFO L231 Difference]: Finished difference. Result has 91 places, 108 transitions, 831 flow [2024-06-03 19:23:54,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=831, PETRI_PLACES=91, PETRI_TRANSITIONS=108} [2024-06-03 19:23:54,677 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-03 19:23:54,677 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 108 transitions, 831 flow [2024-06-03 19:23:54,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:54,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:54,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:54,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:23:54,677 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)] === [2024-06-03 19:23:54,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:54,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1599747485, now seen corresponding path program 1 times [2024-06-03 19:23:54,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:54,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591317077] [2024-06-03 19:23:54,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:54,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:55,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:55,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591317077] [2024-06-03 19:23:55,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591317077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:55,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:55,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:23:55,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039927356] [2024-06-03 19:23:55,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:55,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:23:55,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:55,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:23:55,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:23:55,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:23:55,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 108 transitions, 831 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-03 19:23:55,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:55,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:23:55,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:57,358 INFO L124 PetriNetUnfolderBase]: 10278/15124 cut-off events. [2024-06-03 19:23:57,358 INFO L125 PetriNetUnfolderBase]: For 144069/144069 co-relation queries the response was YES. [2024-06-03 19:23:57,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71109 conditions, 15124 events. 10278/15124 cut-off events. For 144069/144069 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 89620 event pairs, 4511 based on Foata normal form. 4/15095 useless extension candidates. Maximal degree in co-relation 71076. Up to 13956 conditions per place. [2024-06-03 19:23:57,467 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 110 selfloop transitions, 10 changer transitions 0/127 dead transitions. [2024-06-03 19:23:57,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 127 transitions, 1155 flow [2024-06-03 19:23:57,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:23:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:23:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 19:23:57,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-06-03 19:23:57,469 INFO L175 Difference]: Start difference. First operand has 91 places, 108 transitions, 831 flow. Second operand 5 states and 120 transitions. [2024-06-03 19:23:57,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 127 transitions, 1155 flow [2024-06-03 19:23:57,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 127 transitions, 1071 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 19:23:57,529 INFO L231 Difference]: Finished difference. Result has 90 places, 112 transitions, 830 flow [2024-06-03 19:23:57,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=830, PETRI_PLACES=90, PETRI_TRANSITIONS=112} [2024-06-03 19:23:57,530 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 34 predicate places. [2024-06-03 19:23:57,530 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 112 transitions, 830 flow [2024-06-03 19:23:57,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-03 19:23:57,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:57,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:57,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:23:57,531 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:57,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:57,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1846985499, now seen corresponding path program 1 times [2024-06-03 19:23:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:57,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565071898] [2024-06-03 19:23:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:58,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:58,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565071898] [2024-06-03 19:23:58,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565071898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:58,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:58,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:58,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398754860] [2024-06-03 19:23:58,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:58,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:58,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:58,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:58,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:59,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:23:59,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 112 transitions, 830 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:59,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:59,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:23:59,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:01,194 INFO L124 PetriNetUnfolderBase]: 11600/16432 cut-off events. [2024-06-03 19:24:01,194 INFO L125 PetriNetUnfolderBase]: For 196593/196625 co-relation queries the response was YES. [2024-06-03 19:24:01,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84850 conditions, 16432 events. 11600/16432 cut-off events. For 196593/196625 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 93607 event pairs, 5068 based on Foata normal form. 11/16442 useless extension candidates. Maximal degree in co-relation 84816. Up to 15613 conditions per place. [2024-06-03 19:24:01,287 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 121 selfloop transitions, 25 changer transitions 0/154 dead transitions. [2024-06-03 19:24:01,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 154 transitions, 1291 flow [2024-06-03 19:24:01,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 19:24:01,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-03 19:24:01,288 INFO L175 Difference]: Start difference. First operand has 90 places, 112 transitions, 830 flow. Second operand 7 states and 177 transitions. [2024-06-03 19:24:01,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 154 transitions, 1291 flow [2024-06-03 19:24:01,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 154 transitions, 1238 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:01,337 INFO L231 Difference]: Finished difference. Result has 94 places, 116 transitions, 920 flow [2024-06-03 19:24:01,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=920, PETRI_PLACES=94, PETRI_TRANSITIONS=116} [2024-06-03 19:24:01,338 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-03 19:24:01,338 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 116 transitions, 920 flow [2024-06-03 19:24:01,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:01,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:01,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:01,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:24:01,339 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:01,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:01,339 INFO L85 PathProgramCache]: Analyzing trace with hash 875479065, now seen corresponding path program 1 times [2024-06-03 19:24:01,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:01,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890907932] [2024-06-03 19:24:01,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:01,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:02,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:02,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890907932] [2024-06-03 19:24:02,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890907932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:02,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:02,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249797790] [2024-06-03 19:24:02,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:02,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:02,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:02,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:02,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:02,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:24:02,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 116 transitions, 920 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:02,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:02,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:24:02,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:04,690 INFO L124 PetriNetUnfolderBase]: 11913/16787 cut-off events. [2024-06-03 19:24:04,690 INFO L125 PetriNetUnfolderBase]: For 208799/208799 co-relation queries the response was YES. [2024-06-03 19:24:04,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85629 conditions, 16787 events. 11913/16787 cut-off events. For 208799/208799 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 93449 event pairs, 4954 based on Foata normal form. 9/16795 useless extension candidates. Maximal degree in co-relation 85594. Up to 15784 conditions per place. [2024-06-03 19:24:04,793 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 122 selfloop transitions, 48 changer transitions 0/176 dead transitions. [2024-06-03 19:24:04,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 176 transitions, 1528 flow [2024-06-03 19:24:04,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:04,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 19:24:04,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-03 19:24:04,795 INFO L175 Difference]: Start difference. First operand has 94 places, 116 transitions, 920 flow. Second operand 8 states and 196 transitions. [2024-06-03 19:24:04,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 176 transitions, 1528 flow [2024-06-03 19:24:04,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 176 transitions, 1378 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 19:24:04,873 INFO L231 Difference]: Finished difference. Result has 98 places, 131 transitions, 1046 flow [2024-06-03 19:24:04,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1046, PETRI_PLACES=98, PETRI_TRANSITIONS=131} [2024-06-03 19:24:04,873 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-03 19:24:04,873 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 131 transitions, 1046 flow [2024-06-03 19:24:04,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:04,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:04,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:04,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:24:04,874 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:04,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1303445309, now seen corresponding path program 2 times [2024-06-03 19:24:04,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:04,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284249909] [2024-06-03 19:24:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:04,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:06,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:06,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284249909] [2024-06-03 19:24:06,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284249909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:06,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:06,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:06,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534323337] [2024-06-03 19:24:06,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:06,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:06,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:06,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:06,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:06,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:24:06,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 131 transitions, 1046 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:06,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:06,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:24:06,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:08,277 INFO L124 PetriNetUnfolderBase]: 12045/16974 cut-off events. [2024-06-03 19:24:08,277 INFO L125 PetriNetUnfolderBase]: For 229156/229170 co-relation queries the response was YES. [2024-06-03 19:24:08,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88527 conditions, 16974 events. 12045/16974 cut-off events. For 229156/229170 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 94417 event pairs, 4981 based on Foata normal form. 19/16992 useless extension candidates. Maximal degree in co-relation 88490. Up to 15807 conditions per place. [2024-06-03 19:24:08,406 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 116 selfloop transitions, 68 changer transitions 0/190 dead transitions. [2024-06-03 19:24:08,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 190 transitions, 1670 flow [2024-06-03 19:24:08,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:08,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 19:24:08,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2024-06-03 19:24:08,410 INFO L175 Difference]: Start difference. First operand has 98 places, 131 transitions, 1046 flow. Second operand 8 states and 199 transitions. [2024-06-03 19:24:08,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 190 transitions, 1670 flow [2024-06-03 19:24:08,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 190 transitions, 1596 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 19:24:08,510 INFO L231 Difference]: Finished difference. Result has 103 places, 147 transitions, 1283 flow [2024-06-03 19:24:08,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1283, PETRI_PLACES=103, PETRI_TRANSITIONS=147} [2024-06-03 19:24:08,511 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 47 predicate places. [2024-06-03 19:24:08,511 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 147 transitions, 1283 flow [2024-06-03 19:24:08,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:08,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:08,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:08,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:24:08,512 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:08,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:08,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1240791581, now seen corresponding path program 3 times [2024-06-03 19:24:08,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:08,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635072612] [2024-06-03 19:24:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:08,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:09,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:09,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635072612] [2024-06-03 19:24:09,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635072612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:09,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:09,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:09,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449216604] [2024-06-03 19:24:09,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:09,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:09,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:09,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:09,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:10,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:24:10,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 147 transitions, 1283 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:10,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:10,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:24:10,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:12,000 INFO L124 PetriNetUnfolderBase]: 12049/16980 cut-off events. [2024-06-03 19:24:12,000 INFO L125 PetriNetUnfolderBase]: For 249959/249973 co-relation queries the response was YES. [2024-06-03 19:24:12,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90939 conditions, 16980 events. 12049/16980 cut-off events. For 249959/249973 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 94463 event pairs, 4957 based on Foata normal form. 19/16998 useless extension candidates. Maximal degree in co-relation 90899. Up to 15813 conditions per place. [2024-06-03 19:24:12,145 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 121 selfloop transitions, 74 changer transitions 0/201 dead transitions. [2024-06-03 19:24:12,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 201 transitions, 1927 flow [2024-06-03 19:24:12,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 19:24:12,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2024-06-03 19:24:12,147 INFO L175 Difference]: Start difference. First operand has 103 places, 147 transitions, 1283 flow. Second operand 8 states and 198 transitions. [2024-06-03 19:24:12,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 201 transitions, 1927 flow [2024-06-03 19:24:12,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 201 transitions, 1822 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:12,315 INFO L231 Difference]: Finished difference. Result has 108 places, 156 transitions, 1464 flow [2024-06-03 19:24:12,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1464, PETRI_PLACES=108, PETRI_TRANSITIONS=156} [2024-06-03 19:24:12,315 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-03 19:24:12,315 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 156 transitions, 1464 flow [2024-06-03 19:24:12,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:12,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:12,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:12,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:24:12,316 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:12,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:12,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1019578845, now seen corresponding path program 4 times [2024-06-03 19:24:12,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:12,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132533336] [2024-06-03 19:24:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:12,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:12,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:13,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:13,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:13,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132533336] [2024-06-03 19:24:13,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132533336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:13,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:13,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:13,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677685471] [2024-06-03 19:24:13,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:13,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:13,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:13,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:13,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:13,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:24:13,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 156 transitions, 1464 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:13,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:13,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:24:13,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:16,041 INFO L124 PetriNetUnfolderBase]: 12028/16950 cut-off events. [2024-06-03 19:24:16,041 INFO L125 PetriNetUnfolderBase]: For 266795/266809 co-relation queries the response was YES. [2024-06-03 19:24:16,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92266 conditions, 16950 events. 12028/16950 cut-off events. For 266795/266809 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 94340 event pairs, 4957 based on Foata normal form. 13/16962 useless extension candidates. Maximal degree in co-relation 92224. Up to 15623 conditions per place. [2024-06-03 19:24:16,144 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 102 selfloop transitions, 91 changer transitions 0/199 dead transitions. [2024-06-03 19:24:16,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 199 transitions, 1975 flow [2024-06-03 19:24:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 19:24:16,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46462264150943394 [2024-06-03 19:24:16,146 INFO L175 Difference]: Start difference. First operand has 108 places, 156 transitions, 1464 flow. Second operand 8 states and 197 transitions. [2024-06-03 19:24:16,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 199 transitions, 1975 flow [2024-06-03 19:24:16,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 199 transitions, 1771 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 19:24:16,319 INFO L231 Difference]: Finished difference. Result has 112 places, 156 transitions, 1453 flow [2024-06-03 19:24:16,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1453, PETRI_PLACES=112, PETRI_TRANSITIONS=156} [2024-06-03 19:24:16,320 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 56 predicate places. [2024-06-03 19:24:16,320 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 156 transitions, 1453 flow [2024-06-03 19:24:16,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:16,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:16,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:16,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:24:16,321 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:16,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:16,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1550288491, now seen corresponding path program 1 times [2024-06-03 19:24:16,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:16,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025232504] [2024-06-03 19:24:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:16,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:17,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:17,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025232504] [2024-06-03 19:24:17,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025232504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:17,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:17,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:24:17,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201377969] [2024-06-03 19:24:17,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:17,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:24:17,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:24:17,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:24:17,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:17,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 156 transitions, 1453 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:17,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:17,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:17,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:20,045 INFO L124 PetriNetUnfolderBase]: 11671/16602 cut-off events. [2024-06-03 19:24:20,045 INFO L125 PetriNetUnfolderBase]: For 290116/290216 co-relation queries the response was YES. [2024-06-03 19:24:20,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92668 conditions, 16602 events. 11671/16602 cut-off events. For 290116/290216 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 94880 event pairs, 4779 based on Foata normal form. 30/16631 useless extension candidates. Maximal degree in co-relation 92625. Up to 15674 conditions per place. [2024-06-03 19:24:20,166 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 182 selfloop transitions, 43 changer transitions 0/235 dead transitions. [2024-06-03 19:24:20,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 235 transitions, 2339 flow [2024-06-03 19:24:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:20,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:20,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-03 19:24:20,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47379454926624737 [2024-06-03 19:24:20,168 INFO L175 Difference]: Start difference. First operand has 112 places, 156 transitions, 1453 flow. Second operand 9 states and 226 transitions. [2024-06-03 19:24:20,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 235 transitions, 2339 flow [2024-06-03 19:24:20,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 235 transitions, 2080 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 19:24:20,334 INFO L231 Difference]: Finished difference. Result has 117 places, 183 transitions, 1634 flow [2024-06-03 19:24:20,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1634, PETRI_PLACES=117, PETRI_TRANSITIONS=183} [2024-06-03 19:24:20,335 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 61 predicate places. [2024-06-03 19:24:20,335 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 183 transitions, 1634 flow [2024-06-03 19:24:20,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:20,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:20,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:20,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:24:20,336 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:20,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:20,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1419235871, now seen corresponding path program 2 times [2024-06-03 19:24:20,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:20,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522773623] [2024-06-03 19:24:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:20,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:21,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:21,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522773623] [2024-06-03 19:24:21,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522773623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:21,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:21,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:24:21,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640670982] [2024-06-03 19:24:21,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:21,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:24:21,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:21,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:24:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:24:21,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:21,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 183 transitions, 1634 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:21,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:21,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:21,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:24,268 INFO L124 PetriNetUnfolderBase]: 11744/16735 cut-off events. [2024-06-03 19:24:24,268 INFO L125 PetriNetUnfolderBase]: For 326062/326124 co-relation queries the response was YES. [2024-06-03 19:24:24,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96654 conditions, 16735 events. 11744/16735 cut-off events. For 326062/326124 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 95692 event pairs, 3934 based on Foata normal form. 30/16764 useless extension candidates. Maximal degree in co-relation 96607. Up to 15688 conditions per place. [2024-06-03 19:24:24,418 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 176 selfloop transitions, 47 changer transitions 0/233 dead transitions. [2024-06-03 19:24:24,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 233 transitions, 2306 flow [2024-06-03 19:24:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:24,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 19:24:24,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4693396226415094 [2024-06-03 19:24:24,420 INFO L175 Difference]: Start difference. First operand has 117 places, 183 transitions, 1634 flow. Second operand 8 states and 199 transitions. [2024-06-03 19:24:24,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 233 transitions, 2306 flow [2024-06-03 19:24:24,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 233 transitions, 2204 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:24,676 INFO L231 Difference]: Finished difference. Result has 122 places, 186 transitions, 1718 flow [2024-06-03 19:24:24,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1532, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1718, PETRI_PLACES=122, PETRI_TRANSITIONS=186} [2024-06-03 19:24:24,677 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 66 predicate places. [2024-06-03 19:24:24,677 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 186 transitions, 1718 flow [2024-06-03 19:24:24,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:24,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:24,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:24,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:24:24,678 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:24,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1251776937, now seen corresponding path program 3 times [2024-06-03 19:24:24,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:24,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338173197] [2024-06-03 19:24:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:24,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:26,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:26,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338173197] [2024-06-03 19:24:26,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338173197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:26,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:26,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:24:26,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743335358] [2024-06-03 19:24:26,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:26,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:24:26,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:26,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:24:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:24:26,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:26,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 186 transitions, 1718 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:26,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:26,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:26,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:28,364 INFO L124 PetriNetUnfolderBase]: 11808/16804 cut-off events. [2024-06-03 19:24:28,364 INFO L125 PetriNetUnfolderBase]: For 368997/369059 co-relation queries the response was YES. [2024-06-03 19:24:28,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100486 conditions, 16804 events. 11808/16804 cut-off events. For 368997/369059 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 95951 event pairs, 4461 based on Foata normal form. 36/16832 useless extension candidates. Maximal degree in co-relation 100438. Up to 15784 conditions per place. [2024-06-03 19:24:28,526 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 174 selfloop transitions, 52 changer transitions 0/236 dead transitions. [2024-06-03 19:24:28,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 236 transitions, 2404 flow [2024-06-03 19:24:28,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:28,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 19:24:28,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-03 19:24:28,529 INFO L175 Difference]: Start difference. First operand has 122 places, 186 transitions, 1718 flow. Second operand 8 states and 200 transitions. [2024-06-03 19:24:28,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 236 transitions, 2404 flow [2024-06-03 19:24:28,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 236 transitions, 2240 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:28,853 INFO L231 Difference]: Finished difference. Result has 124 places, 189 transitions, 1755 flow [2024-06-03 19:24:28,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1755, PETRI_PLACES=124, PETRI_TRANSITIONS=189} [2024-06-03 19:24:28,854 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 68 predicate places. [2024-06-03 19:24:28,854 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 189 transitions, 1755 flow [2024-06-03 19:24:28,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:28,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:28,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:28,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:24:28,855 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:28,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:28,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1369864617, now seen corresponding path program 4 times [2024-06-03 19:24:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:28,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129196505] [2024-06-03 19:24:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:28,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:30,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:30,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:30,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129196505] [2024-06-03 19:24:30,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129196505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:30,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:30,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:24:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689835799] [2024-06-03 19:24:30,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:30,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:24:30,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:30,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:24:30,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:24:30,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:30,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 189 transitions, 1755 flow. Second operand has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:30,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:30,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:30,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:32,983 INFO L124 PetriNetUnfolderBase]: 12036/17155 cut-off events. [2024-06-03 19:24:32,983 INFO L125 PetriNetUnfolderBase]: For 385019/385077 co-relation queries the response was YES. [2024-06-03 19:24:33,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102604 conditions, 17155 events. 12036/17155 cut-off events. For 385019/385077 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 98377 event pairs, 4496 based on Foata normal form. 100/17254 useless extension candidates. Maximal degree in co-relation 102555. Up to 15774 conditions per place. [2024-06-03 19:24:33,143 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 160 selfloop transitions, 69 changer transitions 0/239 dead transitions. [2024-06-03 19:24:33,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 239 transitions, 2447 flow [2024-06-03 19:24:33,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-03 19:24:33,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-06-03 19:24:33,145 INFO L175 Difference]: Start difference. First operand has 124 places, 189 transitions, 1755 flow. Second operand 8 states and 206 transitions. [2024-06-03 19:24:33,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 239 transitions, 2447 flow [2024-06-03 19:24:33,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 239 transitions, 2284 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:33,484 INFO L231 Difference]: Finished difference. Result has 126 places, 192 transitions, 1827 flow [2024-06-03 19:24:33,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1827, PETRI_PLACES=126, PETRI_TRANSITIONS=192} [2024-06-03 19:24:33,485 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 70 predicate places. [2024-06-03 19:24:33,485 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 192 transitions, 1827 flow [2024-06-03 19:24:33,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.4) internal successors, (134), 10 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:33,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:33,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:33,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:24:33,486 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:33,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:33,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1537568699, now seen corresponding path program 1 times [2024-06-03 19:24:33,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:33,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734605877] [2024-06-03 19:24:33,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:33,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:33,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:35,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:35,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734605877] [2024-06-03 19:24:35,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734605877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:35,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:35,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:24:35,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423018448] [2024-06-03 19:24:35,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:35,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:24:35,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:35,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:24:35,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:24:35,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:24:35,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 192 transitions, 1827 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:35,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:35,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:24:35,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:38,594 INFO L124 PetriNetUnfolderBase]: 12668/17812 cut-off events. [2024-06-03 19:24:38,594 INFO L125 PetriNetUnfolderBase]: For 416952/416968 co-relation queries the response was YES. [2024-06-03 19:24:38,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107551 conditions, 17812 events. 12668/17812 cut-off events. For 416952/416968 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 98763 event pairs, 4717 based on Foata normal form. 22/17826 useless extension candidates. Maximal degree in co-relation 107501. Up to 17099 conditions per place. [2024-06-03 19:24:38,775 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 216 selfloop transitions, 29 changer transitions 0/251 dead transitions. [2024-06-03 19:24:38,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 251 transitions, 2601 flow [2024-06-03 19:24:38,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:38,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-03 19:24:38,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44025157232704404 [2024-06-03 19:24:38,777 INFO L175 Difference]: Start difference. First operand has 126 places, 192 transitions, 1827 flow. Second operand 9 states and 210 transitions. [2024-06-03 19:24:38,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 251 transitions, 2601 flow [2024-06-03 19:24:39,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 251 transitions, 2408 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:39,224 INFO L231 Difference]: Finished difference. Result has 131 places, 200 transitions, 1843 flow [2024-06-03 19:24:39,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1642, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1843, PETRI_PLACES=131, PETRI_TRANSITIONS=200} [2024-06-03 19:24:39,225 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-03 19:24:39,225 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 200 transitions, 1843 flow [2024-06-03 19:24:39,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:39,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:39,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:39,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:24:39,225 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:39,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:39,226 INFO L85 PathProgramCache]: Analyzing trace with hash 807230180, now seen corresponding path program 1 times [2024-06-03 19:24:39,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:39,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86740022] [2024-06-03 19:24:39,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:40,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:40,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86740022] [2024-06-03 19:24:40,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86740022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:40,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:40,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:24:40,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273433875] [2024-06-03 19:24:40,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:40,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:24:40,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:40,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:24:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:24:40,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:24:40,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 200 transitions, 1843 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:40,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:40,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:24:40,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:42,969 INFO L124 PetriNetUnfolderBase]: 12700/17857 cut-off events. [2024-06-03 19:24:42,969 INFO L125 PetriNetUnfolderBase]: For 445695/445711 co-relation queries the response was YES. [2024-06-03 19:24:43,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109595 conditions, 17857 events. 12700/17857 cut-off events. For 445695/445711 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 98795 event pairs, 4681 based on Foata normal form. 20/17875 useless extension candidates. Maximal degree in co-relation 109542. Up to 17154 conditions per place. [2024-06-03 19:24:43,104 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 208 selfloop transitions, 25 changer transitions 0/239 dead transitions. [2024-06-03 19:24:43,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 239 transitions, 2625 flow [2024-06-03 19:24:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:24:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:24:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 19:24:43,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-03 19:24:43,111 INFO L175 Difference]: Start difference. First operand has 131 places, 200 transitions, 1843 flow. Second operand 6 states and 147 transitions. [2024-06-03 19:24:43,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 239 transitions, 2625 flow [2024-06-03 19:24:43,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 239 transitions, 2510 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 19:24:43,415 INFO L231 Difference]: Finished difference. Result has 132 places, 208 transitions, 1924 flow [2024-06-03 19:24:43,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1924, PETRI_PLACES=132, PETRI_TRANSITIONS=208} [2024-06-03 19:24:43,416 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 76 predicate places. [2024-06-03 19:24:43,416 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 208 transitions, 1924 flow [2024-06-03 19:24:43,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:43,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:43,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:43,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:24:43,417 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:43,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash 198442939, now seen corresponding path program 2 times [2024-06-03 19:24:43,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:43,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220970070] [2024-06-03 19:24:43,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:43,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:45,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:45,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220970070] [2024-06-03 19:24:45,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220970070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:45,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:45,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:24:45,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432687200] [2024-06-03 19:24:45,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:45,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:24:45,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:45,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:24:45,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:24:45,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:24:45,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 208 transitions, 1924 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:45,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:45,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:24:45,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:48,246 INFO L124 PetriNetUnfolderBase]: 12736/17921 cut-off events. [2024-06-03 19:24:48,246 INFO L125 PetriNetUnfolderBase]: For 486560/486588 co-relation queries the response was YES. [2024-06-03 19:24:48,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113500 conditions, 17921 events. 12736/17921 cut-off events. For 486560/486588 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 99330 event pairs, 4703 based on Foata normal form. 29/17949 useless extension candidates. Maximal degree in co-relation 113446. Up to 16507 conditions per place. [2024-06-03 19:24:48,371 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 140 selfloop transitions, 115 changer transitions 0/261 dead transitions. [2024-06-03 19:24:48,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 261 transitions, 2681 flow [2024-06-03 19:24:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-03 19:24:48,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4591194968553459 [2024-06-03 19:24:48,373 INFO L175 Difference]: Start difference. First operand has 132 places, 208 transitions, 1924 flow. Second operand 9 states and 219 transitions. [2024-06-03 19:24:48,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 261 transitions, 2681 flow [2024-06-03 19:24:48,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 261 transitions, 2611 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-03 19:24:48,759 INFO L231 Difference]: Finished difference. Result has 139 places, 211 transitions, 2184 flow [2024-06-03 19:24:48,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2184, PETRI_PLACES=139, PETRI_TRANSITIONS=211} [2024-06-03 19:24:48,759 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-03 19:24:48,760 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 211 transitions, 2184 flow [2024-06-03 19:24:48,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:48,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:48,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:48,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:24:48,760 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:48,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:48,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1515624809, now seen corresponding path program 3 times [2024-06-03 19:24:48,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:48,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942045027] [2024-06-03 19:24:48,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:48,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:50,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:50,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:50,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942045027] [2024-06-03 19:24:50,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942045027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:50,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:50,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:24:50,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337765764] [2024-06-03 19:24:50,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:50,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:24:50,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:50,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:24:50,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:24:50,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:24:50,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 211 transitions, 2184 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:50,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:50,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:24:50,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:53,586 INFO L124 PetriNetUnfolderBase]: 13005/18276 cut-off events. [2024-06-03 19:24:53,586 INFO L125 PetriNetUnfolderBase]: For 552619/552647 co-relation queries the response was YES. [2024-06-03 19:24:53,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120817 conditions, 18276 events. 13005/18276 cut-off events. For 552619/552647 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 101347 event pairs, 4266 based on Foata normal form. 29/18304 useless extension candidates. Maximal degree in co-relation 120761. Up to 16442 conditions per place. [2024-06-03 19:24:53,729 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 143 selfloop transitions, 126 changer transitions 0/275 dead transitions. [2024-06-03 19:24:53,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 275 transitions, 3233 flow [2024-06-03 19:24:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:53,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-03 19:24:53,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758909853249476 [2024-06-03 19:24:53,731 INFO L175 Difference]: Start difference. First operand has 139 places, 211 transitions, 2184 flow. Second operand 9 states and 227 transitions. [2024-06-03 19:24:53,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 275 transitions, 3233 flow [2024-06-03 19:24:54,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 275 transitions, 2929 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-03 19:24:54,203 INFO L231 Difference]: Finished difference. Result has 141 places, 217 transitions, 2328 flow [2024-06-03 19:24:54,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2328, PETRI_PLACES=141, PETRI_TRANSITIONS=217} [2024-06-03 19:24:54,204 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-03 19:24:54,204 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 217 transitions, 2328 flow [2024-06-03 19:24:54,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:54,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:54,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:54,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:24:54,205 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:54,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1486642481, now seen corresponding path program 4 times [2024-06-03 19:24:54,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:54,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350041496] [2024-06-03 19:24:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:54,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:55,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:55,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:55,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350041496] [2024-06-03 19:24:55,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350041496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:55,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:55,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:24:55,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740377657] [2024-06-03 19:24:55,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:55,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:24:55,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:24:55,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:24:56,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:24:56,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 217 transitions, 2328 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:56,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:56,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:24:56,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:59,173 INFO L124 PetriNetUnfolderBase]: 13205/18592 cut-off events. [2024-06-03 19:24:59,173 INFO L125 PetriNetUnfolderBase]: For 623638/623666 co-relation queries the response was YES. [2024-06-03 19:24:59,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126116 conditions, 18592 events. 13205/18592 cut-off events. For 623638/623666 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 103826 event pairs, 4736 based on Foata normal form. 59/18650 useless extension candidates. Maximal degree in co-relation 126059. Up to 17160 conditions per place. [2024-06-03 19:24:59,309 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 175 selfloop transitions, 95 changer transitions 0/276 dead transitions. [2024-06-03 19:24:59,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 276 transitions, 3158 flow [2024-06-03 19:24:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:59,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-03 19:24:59,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.469601677148847 [2024-06-03 19:24:59,311 INFO L175 Difference]: Start difference. First operand has 141 places, 217 transitions, 2328 flow. Second operand 9 states and 224 transitions. [2024-06-03 19:24:59,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 276 transitions, 3158 flow [2024-06-03 19:24:59,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 276 transitions, 2857 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-03 19:24:59,871 INFO L231 Difference]: Finished difference. Result has 143 places, 220 transitions, 2332 flow [2024-06-03 19:24:59,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2332, PETRI_PLACES=143, PETRI_TRANSITIONS=220} [2024-06-03 19:24:59,872 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-03 19:24:59,872 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 220 transitions, 2332 flow [2024-06-03 19:24:59,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:59,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:59,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:59,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:24:59,872 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:59,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:59,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1752096839, now seen corresponding path program 5 times [2024-06-03 19:24:59,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:59,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498568129] [2024-06-03 19:24:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:59,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:59,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:01,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:01,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498568129] [2024-06-03 19:25:01,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498568129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:01,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:01,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:25:01,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325240709] [2024-06-03 19:25:01,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:01,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:25:01,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:25:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:25:01,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 53 [2024-06-03 19:25:01,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 220 transitions, 2332 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:01,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:01,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 53 [2024-06-03 19:25:01,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand