./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix047_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix047_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.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/mix047_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix047_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 15:18:51,243 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 15:18:51,310 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 15:18:51,314 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 15:18:51,314 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 15:18:51,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 15:18:51,329 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 15:18:51,330 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 15:18:51,330 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 15:18:51,330 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 15:18:51,331 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 15:18:51,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 15:18:51,331 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 15:18:51,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 15:18:51,332 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 15:18:51,332 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 15:18:51,333 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 15:18:51,333 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 15:18:51,333 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 15:18:51,333 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 15:18:51,334 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 15:18:51,334 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 15:18:51,334 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 15:18:51,335 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 15:18:51,335 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 15:18:51,335 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 15:18:51,336 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 15:18:51,336 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 15:18:51,336 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 15:18:51,336 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 15:18:51,337 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 15:18:51,337 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 15:18:51,337 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:18:51,338 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 15:18:51,338 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 15:18:51,338 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 15:18:51,339 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 15:18:51,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 15:18:51,339 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 15:18:51,339 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 15:18:51,340 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 15:18:51,340 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 15:18:51,340 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 15:18:51,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 15:18:51,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 15:18:51,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 15:18:51,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 15:18:51,560 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 15:18:51,560 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 15:18:51,561 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix047_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 15:18:51,726 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 15:18:51,726 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 15:18:51,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix047_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-04 15:18:52,825 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 15:18:53,002 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 15:18:53,003 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix047_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-04 15:18:53,014 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90ddf1cba/b2c23148ce044f63b646b105d800832f/FLAG9e0bdf8b2 [2024-06-04 15:18:53,023 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90ddf1cba/b2c23148ce044f63b646b105d800832f [2024-06-04 15:18:53,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 15:18:53,025 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 15:18:53,026 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 15:18:53,026 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 15:18:53,030 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 15:18:53,030 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:18:51" (1/2) ... [2024-06-04 15:18:53,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3563095d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:18:53, skipping insertion in model container [2024-06-04 15:18:53,031 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:18:51" (1/2) ... [2024-06-04 15:18:53,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64c48d0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 03:18:53, skipping insertion in model container [2024-06-04 15:18:53,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:18:53" (2/2) ... [2024-06-04 15:18:53,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3563095d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53, skipping insertion in model container [2024-06-04 15:18:53,032 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 03:18:53" (2/2) ... [2024-06-04 15:18:53,033 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 15:18:53,126 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 15:18:53,127 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-04 15:18:53,127 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-04 15:18:53,127 INFO L97 edCorrectnessWitness]: Location invariant before [L852-L852] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-04 15:18:53,127 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || z$r_buff1_thd3 == (_Bool)0) && (! multithreaded || ((((0 <= z$w_buff0 && z$w_buff0 <= 2) && z$w_buff0 <= 127) && z$w_buff0 % 2 == 0) && (z$w_buff0 == 0 || z$w_buff0 == 2)))) && (! multithreaded || (((0 <= z$mem_tmp && z$mem_tmp <= 2) && z$mem_tmp <= 127) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((((0 <= z$w_buff1 && z$w_buff1 <= 2) && z$w_buff1 <= 127) && z$w_buff1 % 2 == 0) && (z$w_buff1 == 0 || z$w_buff1 == 2)))) && (! multithreaded || ((0 <= b && b <= 1) && (b == 0 || b == 1)))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-04 15:18:53,127 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 15:18:53,127 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-04 15:18:53,163 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 15:18:53,498 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:18:53,507 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 15:18:53,649 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 15:18:53,681 INFO L206 MainTranslator]: Completed translation [2024-06-04 15:18:53,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53 WrapperNode [2024-06-04 15:18:53,682 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 15:18:53,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 15:18:53,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 15:18:53,684 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 15:18:53,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,705 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,753 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 163 [2024-06-04 15:18:53,753 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 15:18:53,754 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 15:18:53,754 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 15:18:53,754 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 15:18:53,762 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,767 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,788 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]. [2024-06-04 15:18:53,788 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,788 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,797 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,799 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,801 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,802 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,805 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 15:18:53,806 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 15:18:53,806 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 15:18:53,806 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 15:18:53,807 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (1/1) ... [2024-06-04 15:18:53,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 15:18:53,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 15:18:53,839 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) [2024-06-04 15:18:53,866 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 [2024-06-04 15:18:53,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 15:18:53,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 15:18:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 15:18:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 15:18:53,889 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 15:18:53,889 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 15:18:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 15:18:53,890 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 15:18:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 15:18:53,890 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 15:18:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 15:18:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 15:18:53,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 15:18:53,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 15:18:53,931 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 15:18:54,092 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 15:18:54,094 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 15:18:54,471 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 15:18:54,471 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 15:18:54,576 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 15:18:54,577 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 15:18:54,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:18:54 BoogieIcfgContainer [2024-06-04 15:18:54,577 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 15:18:54,579 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 15:18:54,579 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 15:18:54,581 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 15:18:54,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 03:18:51" (1/4) ... [2024-06-04 15:18:54,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e6a3b7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 03:18:54, skipping insertion in model container [2024-06-04 15:18:54,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 03:18:53" (2/4) ... [2024-06-04 15:18:54,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e6a3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:18:54, skipping insertion in model container [2024-06-04 15:18:54,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 03:18:53" (3/4) ... [2024-06-04 15:18:54,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61e6a3b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 03:18:54, skipping insertion in model container [2024-06-04 15:18:54,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 03:18:54" (4/4) ... [2024-06-04 15:18:54,584 INFO L112 eAbstractionObserver]: Analyzing ICFG mix047_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-04 15:18:54,598 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 15:18:54,598 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 15:18:54,598 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 15:18:54,668 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 15:18:54,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 15:18:54,714 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-04 15:18:54,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:18:54,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 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. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 15:18:54,717 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-04 15:18:54,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-04 15:18:54,725 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 15:18:54,730 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;@489cd729, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 15:18:54,730 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 15:18:54,733 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 15:18:54,734 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 15:18:54,734 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 15:18:54,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:54,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 15:18:54,735 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)] === [2024-06-04 15:18:54,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:54,738 INFO L85 PathProgramCache]: Analyzing trace with hash -947435025, now seen corresponding path program 1 times [2024-06-04 15:18:54,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:54,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107091102] [2024-06-04 15:18:54,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:54,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:55,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:55,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107091102] [2024-06-04 15:18:55,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107091102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:55,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:55,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 15:18:55,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224426827] [2024-06-04 15:18:55,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:55,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 15:18:55,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:55,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 15:18:55,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 15:18:55,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-04 15:18:55,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 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) [2024-06-04 15:18:55,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:55,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-04 15:18:55,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:57,436 INFO L124 PetriNetUnfolderBase]: 9547/13513 cut-off events. [2024-06-04 15:18:57,437 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-06-04 15:18:57,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26847 conditions, 13513 events. 9547/13513 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 76386 event pairs, 7308 based on Foata normal form. 1/13120 useless extension candidates. Maximal degree in co-relation 26831. Up to 12953 conditions per place. [2024-06-04 15:18:57,524 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 45 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-04 15:18:57,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 237 flow [2024-06-04 15:18:57,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 15:18:57,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 15:18:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-04 15:18:57,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-04 15:18:57,535 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 96 transitions. [2024-06-04 15:18:57,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 237 flow [2024-06-04 15:18:57,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 230 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 15:18:57,544 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-04 15:18:57,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-04 15:18:57,548 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-04 15:18:57,548 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-04 15:18:57,549 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) [2024-06-04 15:18:57,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:18:57,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:18:57,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 15:18:57,550 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)] === [2024-06-04 15:18:57,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:18:57,551 INFO L85 PathProgramCache]: Analyzing trace with hash 48040718, now seen corresponding path program 1 times [2024-06-04 15:18:57,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:18:57,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498226872] [2024-06-04 15:18:57,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:18:57,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:18:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:18:58,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:18:58,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:18:58,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498226872] [2024-06-04 15:18:58,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498226872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:18:58,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:18:58,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 15:18:58,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231248961] [2024-06-04 15:18:58,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:18:58,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 15:18:58,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:18:58,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 15:18:58,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 15:18:58,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:18:58,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 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) [2024-06-04 15:18:58,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:18:58,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:18:58,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:18:59,994 INFO L124 PetriNetUnfolderBase]: 10932/15102 cut-off events. [2024-06-04 15:18:59,995 INFO L125 PetriNetUnfolderBase]: For 2813/2813 co-relation queries the response was YES. [2024-06-04 15:19:00,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34117 conditions, 15102 events. 10932/15102 cut-off events. For 2813/2813 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 82853 event pairs, 7512 based on Foata normal form. 4/14922 useless extension candidates. Maximal degree in co-relation 34102. Up to 14763 conditions per place. [2024-06-04 15:19:00,073 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 56 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-04 15:19:00,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 331 flow [2024-06-04 15:19:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 15:19:00,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 15:19:00,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-06-04 15:19:00,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2024-06-04 15:19:00,076 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 121 transitions. [2024-06-04 15:19:00,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 331 flow [2024-06-04 15:19:00,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 15:19:00,078 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-04 15:19:00,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-04 15:19:00,079 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-04 15:19:00,079 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-04 15:19:00,079 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) [2024-06-04 15:19:00,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:00,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:00,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 15:19:00,080 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)] === [2024-06-04 15:19:00,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:00,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1489263350, now seen corresponding path program 1 times [2024-06-04 15:19:00,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:00,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205099364] [2024-06-04 15:19:00,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:00,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:00,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:00,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205099364] [2024-06-04 15:19:00,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205099364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:00,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:00,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 15:19:00,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856668831] [2024-06-04 15:19:00,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:00,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 15:19:00,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:00,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 15:19:00,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 15:19:00,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:19:00,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 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) [2024-06-04 15:19:00,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:00,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:19:00,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:02,229 INFO L124 PetriNetUnfolderBase]: 10950/15203 cut-off events. [2024-06-04 15:19:02,230 INFO L125 PetriNetUnfolderBase]: For 8188/8188 co-relation queries the response was YES. [2024-06-04 15:19:02,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38085 conditions, 15203 events. 10950/15203 cut-off events. For 8188/8188 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 84099 event pairs, 5910 based on Foata normal form. 7/15045 useless extension candidates. Maximal degree in co-relation 38068. Up to 14684 conditions per place. [2024-06-04 15:19:02,290 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 74 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-04 15:19:02,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 547 flow [2024-06-04 15:19:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:19:02,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:19:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-04 15:19:02,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5851851851851851 [2024-06-04 15:19:02,292 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 158 transitions. [2024-06-04 15:19:02,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 547 flow [2024-06-04 15:19:02,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 528 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 15:19:02,296 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 314 flow [2024-06-04 15:19:02,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-04 15:19:02,296 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-04 15:19:02,297 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 314 flow [2024-06-04 15:19:02,297 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) [2024-06-04 15:19:02,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:02,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:02,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 15:19:02,297 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)] === [2024-06-04 15:19:02,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:02,298 INFO L85 PathProgramCache]: Analyzing trace with hash 958005749, now seen corresponding path program 1 times [2024-06-04 15:19:02,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:02,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309423867] [2024-06-04 15:19:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:02,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:03,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:03,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309423867] [2024-06-04 15:19:03,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309423867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:03,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:03,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:19:03,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147327851] [2024-06-04 15:19:03,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:03,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:19:03,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:03,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:19:03,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:19:03,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:19:03,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:03,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:03,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:19:03,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:04,737 INFO L124 PetriNetUnfolderBase]: 10979/15246 cut-off events. [2024-06-04 15:19:04,738 INFO L125 PetriNetUnfolderBase]: For 19602/19608 co-relation queries the response was YES. [2024-06-04 15:19:04,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44479 conditions, 15246 events. 10979/15246 cut-off events. For 19602/19608 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 84364 event pairs, 4816 based on Foata normal form. 18/15099 useless extension candidates. Maximal degree in co-relation 44459. Up to 14649 conditions per place. [2024-06-04 15:19:04,823 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 81 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-04 15:19:04,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 692 flow [2024-06-04 15:19:04,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:19:04,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:19:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-04 15:19:04,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-06-04 15:19:04,827 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 314 flow. Second operand 6 states and 182 transitions. [2024-06-04 15:19:04,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 692 flow [2024-06-04 15:19:04,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 680 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-04 15:19:04,841 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 391 flow [2024-06-04 15:19:04,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-04 15:19:04,843 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2024-06-04 15:19:04,843 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 391 flow [2024-06-04 15:19:04,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:04,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:04,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:04,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 15:19:04,844 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)] === [2024-06-04 15:19:04,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash 413251227, now seen corresponding path program 1 times [2024-06-04 15:19:04,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:04,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796809279] [2024-06-04 15:19:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:04,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:05,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:05,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:05,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796809279] [2024-06-04 15:19:05,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796809279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:05,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:05,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:19:05,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918477514] [2024-06-04 15:19:05,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:05,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:19:05,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:05,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:19:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:19:05,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:19:05,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 391 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) [2024-06-04 15:19:05,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:05,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:19:05,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:07,116 INFO L124 PetriNetUnfolderBase]: 9575/13634 cut-off events. [2024-06-04 15:19:07,116 INFO L125 PetriNetUnfolderBase]: For 25662/25662 co-relation queries the response was YES. [2024-06-04 15:19:07,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43016 conditions, 13634 events. 9575/13634 cut-off events. For 25662/25662 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 78218 event pairs, 4948 based on Foata normal form. 3/13443 useless extension candidates. Maximal degree in co-relation 42993. Up to 12980 conditions per place. [2024-06-04 15:19:07,197 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 68 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-04 15:19:07,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 591 flow [2024-06-04 15:19:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:19:07,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:19:07,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-04 15:19:07,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2024-06-04 15:19:07,201 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 391 flow. Second operand 5 states and 128 transitions. [2024-06-04 15:19:07,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 591 flow [2024-06-04 15:19:07,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 522 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 15:19:07,212 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 353 flow [2024-06-04 15:19:07,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=322, 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=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-04 15:19:07,218 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-04 15:19:07,218 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 353 flow [2024-06-04 15:19:07,218 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) [2024-06-04 15:19:07,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:07,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:07,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 15:19:07,219 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)] === [2024-06-04 15:19:07,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:07,219 INFO L85 PathProgramCache]: Analyzing trace with hash -80599773, now seen corresponding path program 1 times [2024-06-04 15:19:07,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:07,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960535331] [2024-06-04 15:19:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:07,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:08,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:08,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960535331] [2024-06-04 15:19:08,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960535331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:08,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:08,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:19:08,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125379283] [2024-06-04 15:19:08,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:08,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:19:08,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:08,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:19:08,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:19:08,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:19:08,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:08,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:08,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:19:08,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:09,648 INFO L124 PetriNetUnfolderBase]: 9587/13706 cut-off events. [2024-06-04 15:19:09,649 INFO L125 PetriNetUnfolderBase]: For 29621/29621 co-relation queries the response was YES. [2024-06-04 15:19:09,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43820 conditions, 13706 events. 9587/13706 cut-off events. For 29621/29621 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 78785 event pairs, 4728 based on Foata normal form. 5/13559 useless extension candidates. Maximal degree in co-relation 43795. Up to 12930 conditions per place. [2024-06-04 15:19:09,774 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 81 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2024-06-04 15:19:09,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 111 transitions, 753 flow [2024-06-04 15:19:09,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:19:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:19:09,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 15:19:09,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-06-04 15:19:09,789 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 353 flow. Second operand 6 states and 160 transitions. [2024-06-04 15:19:09,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 111 transitions, 753 flow [2024-06-04 15:19:09,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 724 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 15:19:09,799 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 498 flow [2024-06-04 15:19:09,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=498, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-04 15:19:09,818 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-04 15:19:09,819 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 498 flow [2024-06-04 15:19:09,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:09,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:09,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:09,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 15:19:09,819 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)] === [2024-06-04 15:19:09,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:09,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1790653336, now seen corresponding path program 1 times [2024-06-04 15:19:09,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:09,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101758532] [2024-06-04 15:19:09,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:09,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:10,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:10,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:10,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101758532] [2024-06-04 15:19:10,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101758532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:10,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:10,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:19:10,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905657721] [2024-06-04 15:19:10,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:10,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:19:10,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:10,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:19:10,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:19:10,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:10,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 498 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) [2024-06-04 15:19:10,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:10,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:10,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:12,401 INFO L124 PetriNetUnfolderBase]: 10995/15270 cut-off events. [2024-06-04 15:19:12,401 INFO L125 PetriNetUnfolderBase]: For 52050/52062 co-relation queries the response was YES. [2024-06-04 15:19:12,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55269 conditions, 15270 events. 10995/15270 cut-off events. For 52050/52062 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 84090 event pairs, 5541 based on Foata normal form. 14/15132 useless extension candidates. Maximal degree in co-relation 55242. Up to 14743 conditions per place. [2024-06-04 15:19:12,489 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 85 selfloop transitions, 25 changer transitions 0/117 dead transitions. [2024-06-04 15:19:12,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 861 flow [2024-06-04 15:19:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:19:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:19:12,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-04 15:19:12,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2024-06-04 15:19:12,491 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 498 flow. Second operand 6 states and 157 transitions. [2024-06-04 15:19:12,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 861 flow [2024-06-04 15:19:12,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 117 transitions, 837 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-04 15:19:12,512 INFO L231 Difference]: Finished difference. Result has 79 places, 87 transitions, 570 flow [2024-06-04 15:19:12,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=474, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=570, PETRI_PLACES=79, PETRI_TRANSITIONS=87} [2024-06-04 15:19:12,512 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2024-06-04 15:19:12,513 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 87 transitions, 570 flow [2024-06-04 15:19:12,513 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) [2024-06-04 15:19:12,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:12,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:12,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 15:19:12,513 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)] === [2024-06-04 15:19:12,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1997456506, now seen corresponding path program 2 times [2024-06-04 15:19:12,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:12,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461803167] [2024-06-04 15:19:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:12,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:12,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:13,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:13,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:13,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461803167] [2024-06-04 15:19:13,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461803167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:13,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:13,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:19:13,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758364223] [2024-06-04 15:19:13,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:13,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:19:13,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:19:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:19:13,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:13,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 87 transitions, 570 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) [2024-06-04 15:19:13,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:13,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:13,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:14,955 INFO L124 PetriNetUnfolderBase]: 10971/15222 cut-off events. [2024-06-04 15:19:14,955 INFO L125 PetriNetUnfolderBase]: For 58100/58106 co-relation queries the response was YES. [2024-06-04 15:19:14,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55742 conditions, 15222 events. 10971/15222 cut-off events. For 58100/58106 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 83804 event pairs, 5561 based on Foata normal form. 4/15067 useless extension candidates. Maximal degree in co-relation 55712. Up to 14713 conditions per place. [2024-06-04 15:19:15,042 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 78 selfloop transitions, 26 changer transitions 0/111 dead transitions. [2024-06-04 15:19:15,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 111 transitions, 840 flow [2024-06-04 15:19:15,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:19:15,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:19:15,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 15:19:15,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4691358024691358 [2024-06-04 15:19:15,044 INFO L175 Difference]: Start difference. First operand has 79 places, 87 transitions, 570 flow. Second operand 6 states and 152 transitions. [2024-06-04 15:19:15,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 111 transitions, 840 flow [2024-06-04 15:19:15,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 111 transitions, 797 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-04 15:19:15,064 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 590 flow [2024-06-04 15:19:15,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=590, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-04 15:19:15,065 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-04 15:19:15,065 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 590 flow [2024-06-04 15:19:15,065 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) [2024-06-04 15:19:15,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:15,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:15,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 15:19:15,066 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)] === [2024-06-04 15:19:15,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:15,066 INFO L85 PathProgramCache]: Analyzing trace with hash 74700964, now seen corresponding path program 1 times [2024-06-04 15:19:15,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:15,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606911176] [2024-06-04 15:19:15,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:15,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:15,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:15,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606911176] [2024-06-04 15:19:15,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606911176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:15,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:15,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:19:15,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560176356] [2024-06-04 15:19:15,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:15,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:19:15,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:15,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:19:15,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:19:15,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:15,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 590 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) [2024-06-04 15:19:15,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:15,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:15,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:17,664 INFO L124 PetriNetUnfolderBase]: 11509/15884 cut-off events. [2024-06-04 15:19:17,664 INFO L125 PetriNetUnfolderBase]: For 73836/73845 co-relation queries the response was YES. [2024-06-04 15:19:17,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60156 conditions, 15884 events. 11509/15884 cut-off events. For 73836/73845 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 87172 event pairs, 4900 based on Foata normal form. 13/15816 useless extension candidates. Maximal degree in co-relation 60125. Up to 14734 conditions per place. [2024-06-04 15:19:17,752 INFO L140 encePairwiseOnDemand]: 37/54 looper letters, 124 selfloop transitions, 59 changer transitions 0/190 dead transitions. [2024-06-04 15:19:17,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 190 transitions, 1670 flow [2024-06-04 15:19:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:19:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:19:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-04 15:19:17,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5162037037037037 [2024-06-04 15:19:17,754 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 590 flow. Second operand 8 states and 223 transitions. [2024-06-04 15:19:17,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 190 transitions, 1670 flow [2024-06-04 15:19:17,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 190 transitions, 1507 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 15:19:17,794 INFO L231 Difference]: Finished difference. Result has 87 places, 123 transitions, 941 flow [2024-06-04 15:19:17,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=941, PETRI_PLACES=87, PETRI_TRANSITIONS=123} [2024-06-04 15:19:17,794 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-04 15:19:17,795 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 123 transitions, 941 flow [2024-06-04 15:19:17,795 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) [2024-06-04 15:19:17,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:17,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:17,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 15:19:17,795 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)] === [2024-06-04 15:19:17,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash -153618174, now seen corresponding path program 2 times [2024-06-04 15:19:17,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:17,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493699448] [2024-06-04 15:19:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:17,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:18,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:18,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493699448] [2024-06-04 15:19:18,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493699448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:18,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:18,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:19:18,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855425626] [2024-06-04 15:19:18,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:18,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:19:18,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:18,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:19:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:19:18,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:18,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 123 transitions, 941 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) [2024-06-04 15:19:18,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:18,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:18,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:20,993 INFO L124 PetriNetUnfolderBase]: 11857/16402 cut-off events. [2024-06-04 15:19:20,993 INFO L125 PetriNetUnfolderBase]: For 105933/105948 co-relation queries the response was YES. [2024-06-04 15:19:21,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71145 conditions, 16402 events. 11857/16402 cut-off events. For 105933/105948 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 90494 event pairs, 5043 based on Foata normal form. 25/16346 useless extension candidates. Maximal degree in co-relation 71110. Up to 15002 conditions per place. [2024-06-04 15:19:21,112 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 103 selfloop transitions, 81 changer transitions 0/191 dead transitions. [2024-06-04 15:19:21,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 191 transitions, 1813 flow [2024-06-04 15:19:21,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-04 15:19:21,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2024-06-04 15:19:21,114 INFO L175 Difference]: Start difference. First operand has 87 places, 123 transitions, 941 flow. Second operand 7 states and 192 transitions. [2024-06-04 15:19:21,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 191 transitions, 1813 flow [2024-06-04 15:19:21,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 191 transitions, 1719 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-04 15:19:21,186 INFO L231 Difference]: Finished difference. Result has 94 places, 144 transitions, 1314 flow [2024-06-04 15:19:21,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1314, PETRI_PLACES=94, PETRI_TRANSITIONS=144} [2024-06-04 15:19:21,187 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 37 predicate places. [2024-06-04 15:19:21,187 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 144 transitions, 1314 flow [2024-06-04 15:19:21,187 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) [2024-06-04 15:19:21,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:21,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:21,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 15:19:21,188 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)] === [2024-06-04 15:19:21,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:21,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1201396880, now seen corresponding path program 3 times [2024-06-04 15:19:21,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:21,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322502042] [2024-06-04 15:19:21,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:21,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:22,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:22,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322502042] [2024-06-04 15:19:22,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322502042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:22,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:22,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:19:22,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021251672] [2024-06-04 15:19:22,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:22,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:19:22,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:22,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:19:22,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:19:22,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:22,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 144 transitions, 1314 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) [2024-06-04 15:19:22,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:22,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:22,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:24,180 INFO L124 PetriNetUnfolderBase]: 11939/16517 cut-off events. [2024-06-04 15:19:24,180 INFO L125 PetriNetUnfolderBase]: For 139315/139328 co-relation queries the response was YES. [2024-06-04 15:19:24,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78204 conditions, 16517 events. 11939/16517 cut-off events. For 139315/139328 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 90915 event pairs, 5063 based on Foata normal form. 14/16432 useless extension candidates. Maximal degree in co-relation 78165. Up to 15054 conditions per place. [2024-06-04 15:19:24,293 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 107 selfloop transitions, 93 changer transitions 0/207 dead transitions. [2024-06-04 15:19:24,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 207 transitions, 2258 flow [2024-06-04 15:19:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-04 15:19:24,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-04 15:19:24,295 INFO L175 Difference]: Start difference. First operand has 94 places, 144 transitions, 1314 flow. Second operand 7 states and 190 transitions. [2024-06-04 15:19:24,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 207 transitions, 2258 flow [2024-06-04 15:19:24,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 207 transitions, 2131 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 15:19:24,395 INFO L231 Difference]: Finished difference. Result has 99 places, 160 transitions, 1597 flow [2024-06-04 15:19:24,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1597, PETRI_PLACES=99, PETRI_TRANSITIONS=160} [2024-06-04 15:19:24,396 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-04 15:19:24,396 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 160 transitions, 1597 flow [2024-06-04 15:19:24,396 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) [2024-06-04 15:19:24,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:24,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:24,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 15:19:24,397 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)] === [2024-06-04 15:19:24,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:24,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1402479620, now seen corresponding path program 4 times [2024-06-04 15:19:24,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:24,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351818509] [2024-06-04 15:19:24,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:24,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:25,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:25,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351818509] [2024-06-04 15:19:25,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351818509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:25,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:25,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:19:25,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553417088] [2024-06-04 15:19:25,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:19:25,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:25,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:19:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:19:25,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:25,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 160 transitions, 1597 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) [2024-06-04 15:19:25,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:25,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:25,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:27,552 INFO L124 PetriNetUnfolderBase]: 11954/16548 cut-off events. [2024-06-04 15:19:27,552 INFO L125 PetriNetUnfolderBase]: For 172618/172641 co-relation queries the response was YES. [2024-06-04 15:19:27,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82597 conditions, 16548 events. 11954/16548 cut-off events. For 172618/172641 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 91353 event pairs, 5043 based on Foata normal form. 23/16472 useless extension candidates. Maximal degree in co-relation 82556. Up to 15072 conditions per place. [2024-06-04 15:19:27,654 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 97 selfloop transitions, 108 changer transitions 0/212 dead transitions. [2024-06-04 15:19:27,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 212 transitions, 2418 flow [2024-06-04 15:19:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:27,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-04 15:19:27,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-04 15:19:27,656 INFO L175 Difference]: Start difference. First operand has 99 places, 160 transitions, 1597 flow. Second operand 7 states and 188 transitions. [2024-06-04 15:19:27,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 212 transitions, 2418 flow [2024-06-04 15:19:27,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 212 transitions, 2223 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 15:19:27,759 INFO L231 Difference]: Finished difference. Result has 103 places, 168 transitions, 1750 flow [2024-06-04 15:19:27,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1416, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1750, PETRI_PLACES=103, PETRI_TRANSITIONS=168} [2024-06-04 15:19:27,760 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2024-06-04 15:19:27,760 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 168 transitions, 1750 flow [2024-06-04 15:19:27,760 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) [2024-06-04 15:19:27,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:27,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:27,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 15:19:27,761 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:19:27,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1570211408, now seen corresponding path program 1 times [2024-06-04 15:19:27,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:27,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129140091] [2024-06-04 15:19:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:27,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:27,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:28,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:28,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129140091] [2024-06-04 15:19:28,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129140091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:28,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:28,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:19:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136966077] [2024-06-04 15:19:28,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:28,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:19:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:19:28,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:19:28,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:19:28,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 168 transitions, 1750 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:28,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:28,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:19:28,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:30,555 INFO L124 PetriNetUnfolderBase]: 10579/14907 cut-off events. [2024-06-04 15:19:30,556 INFO L125 PetriNetUnfolderBase]: For 158577/158582 co-relation queries the response was YES. [2024-06-04 15:19:30,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74621 conditions, 14907 events. 10579/14907 cut-off events. For 158577/158582 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 84411 event pairs, 4299 based on Foata normal form. 12/14759 useless extension candidates. Maximal degree in co-relation 74578. Up to 14195 conditions per place. [2024-06-04 15:19:30,677 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 174 selfloop transitions, 26 changer transitions 0/208 dead transitions. [2024-06-04 15:19:30,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 208 transitions, 2400 flow [2024-06-04 15:19:30,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:30,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-04 15:19:30,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-06-04 15:19:30,679 INFO L175 Difference]: Start difference. First operand has 103 places, 168 transitions, 1750 flow. Second operand 7 states and 185 transitions. [2024-06-04 15:19:30,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 208 transitions, 2400 flow [2024-06-04 15:19:30,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 208 transitions, 2210 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-04 15:19:30,813 INFO L231 Difference]: Finished difference. Result has 106 places, 172 transitions, 1677 flow [2024-06-04 15:19:30,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1560, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1677, PETRI_PLACES=106, PETRI_TRANSITIONS=172} [2024-06-04 15:19:30,813 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-04 15:19:30,813 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 172 transitions, 1677 flow [2024-06-04 15:19:30,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:30,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:30,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:30,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 15:19:30,814 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:19:30,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:30,815 INFO L85 PathProgramCache]: Analyzing trace with hash -441423975, now seen corresponding path program 1 times [2024-06-04 15:19:30,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:30,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977574332] [2024-06-04 15:19:30,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:30,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:31,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:31,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977574332] [2024-06-04 15:19:31,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977574332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:31,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:31,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 15:19:31,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514251678] [2024-06-04 15:19:31,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:31,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 15:19:31,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:31,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 15:19:31,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-04 15:19:31,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:19:31,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 172 transitions, 1677 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:31,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:31,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:19:31,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:33,283 INFO L124 PetriNetUnfolderBase]: 10572/14891 cut-off events. [2024-06-04 15:19:33,297 INFO L125 PetriNetUnfolderBase]: For 173609/173611 co-relation queries the response was YES. [2024-06-04 15:19:33,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76401 conditions, 14891 events. 10572/14891 cut-off events. For 173609/173611 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 84104 event pairs, 4456 based on Foata normal form. 2/14731 useless extension candidates. Maximal degree in co-relation 76357. Up to 14310 conditions per place. [2024-06-04 15:19:33,431 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 168 selfloop transitions, 10 changer transitions 0/186 dead transitions. [2024-06-04 15:19:33,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 186 transitions, 2077 flow [2024-06-04 15:19:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 15:19:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 15:19:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 15:19:33,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2024-06-04 15:19:33,433 INFO L175 Difference]: Start difference. First operand has 106 places, 172 transitions, 1677 flow. Second operand 5 states and 124 transitions. [2024-06-04 15:19:33,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 186 transitions, 2077 flow [2024-06-04 15:19:33,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 186 transitions, 1982 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 15:19:33,614 INFO L231 Difference]: Finished difference. Result has 106 places, 172 transitions, 1611 flow [2024-06-04 15:19:33,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1582, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1611, PETRI_PLACES=106, PETRI_TRANSITIONS=172} [2024-06-04 15:19:33,615 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-04 15:19:33,615 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 172 transitions, 1611 flow [2024-06-04 15:19:33,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:33,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:33,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:33,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 15:19:33,615 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)] === [2024-06-04 15:19:33,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:33,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1464009070, now seen corresponding path program 1 times [2024-06-04 15:19:33,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:33,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855486502] [2024-06-04 15:19:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:33,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:34,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:34,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855486502] [2024-06-04 15:19:34,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855486502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:34,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:34,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:19:34,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828460569] [2024-06-04 15:19:34,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:34,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:19:34,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:19:34,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:19:34,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:34,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 172 transitions, 1611 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:34,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:34,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:34,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:36,738 INFO L124 PetriNetUnfolderBase]: 12053/16705 cut-off events. [2024-06-04 15:19:36,739 INFO L125 PetriNetUnfolderBase]: For 216641/216662 co-relation queries the response was YES. [2024-06-04 15:19:36,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86700 conditions, 16705 events. 12053/16705 cut-off events. For 216641/216662 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 92304 event pairs, 5134 based on Foata normal form. 25/16634 useless extension candidates. Maximal degree in co-relation 86655. Up to 15181 conditions per place. [2024-06-04 15:19:36,893 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 118 selfloop transitions, 112 changer transitions 0/237 dead transitions. [2024-06-04 15:19:36,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 237 transitions, 2661 flow [2024-06-04 15:19:36,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:36,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-04 15:19:36,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-04 15:19:36,895 INFO L175 Difference]: Start difference. First operand has 106 places, 172 transitions, 1611 flow. Second operand 7 states and 194 transitions. [2024-06-04 15:19:36,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 237 transitions, 2661 flow [2024-06-04 15:19:37,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 237 transitions, 2628 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 15:19:37,064 INFO L231 Difference]: Finished difference. Result has 111 places, 189 transitions, 2157 flow [2024-06-04 15:19:37,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2157, PETRI_PLACES=111, PETRI_TRANSITIONS=189} [2024-06-04 15:19:37,065 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 54 predicate places. [2024-06-04 15:19:37,065 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 189 transitions, 2157 flow [2024-06-04 15:19:37,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:37,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:37,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:37,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 15:19:37,066 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)] === [2024-06-04 15:19:37,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:37,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1464003490, now seen corresponding path program 2 times [2024-06-04 15:19:37,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:37,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290366013] [2024-06-04 15:19:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:37,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:37,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:37,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290366013] [2024-06-04 15:19:37,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290366013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:37,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:37,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:19:37,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174935611] [2024-06-04 15:19:37,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:37,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:19:37,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:37,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:19:37,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:19:38,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:38,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 189 transitions, 2157 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:38,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:38,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:38,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:40,201 INFO L124 PetriNetUnfolderBase]: 12133/16849 cut-off events. [2024-06-04 15:19:40,202 INFO L125 PetriNetUnfolderBase]: For 255951/255986 co-relation queries the response was YES. [2024-06-04 15:19:40,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93237 conditions, 16849 events. 12133/16849 cut-off events. For 255951/255986 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 93649 event pairs, 5122 based on Foata normal form. 37/16790 useless extension candidates. Maximal degree in co-relation 93190. Up to 15259 conditions per place. [2024-06-04 15:19:40,348 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 117 selfloop transitions, 117 changer transitions 0/241 dead transitions. [2024-06-04 15:19:40,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 241 transitions, 3067 flow [2024-06-04 15:19:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:40,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-04 15:19:40,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4973544973544973 [2024-06-04 15:19:40,349 INFO L175 Difference]: Start difference. First operand has 111 places, 189 transitions, 2157 flow. Second operand 7 states and 188 transitions. [2024-06-04 15:19:40,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 241 transitions, 3067 flow [2024-06-04 15:19:40,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 241 transitions, 2906 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-04 15:19:40,608 INFO L231 Difference]: Finished difference. Result has 115 places, 198 transitions, 2382 flow [2024-06-04 15:19:40,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2004, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2382, PETRI_PLACES=115, PETRI_TRANSITIONS=198} [2024-06-04 15:19:40,609 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 58 predicate places. [2024-06-04 15:19:40,609 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 198 transitions, 2382 flow [2024-06-04 15:19:40,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:40,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:40,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:40,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 15:19:40,610 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)] === [2024-06-04 15:19:40,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:40,610 INFO L85 PathProgramCache]: Analyzing trace with hash -287301086, now seen corresponding path program 3 times [2024-06-04 15:19:40,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:40,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379796488] [2024-06-04 15:19:40,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:40,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:41,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:41,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379796488] [2024-06-04 15:19:41,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379796488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:41,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:41,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:19:41,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760476185] [2024-06-04 15:19:41,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:41,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:19:41,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:41,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:19:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:19:41,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:41,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 198 transitions, 2382 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:41,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:41,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:41,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:43,735 INFO L124 PetriNetUnfolderBase]: 12148/16886 cut-off events. [2024-06-04 15:19:43,735 INFO L125 PetriNetUnfolderBase]: For 279593/279687 co-relation queries the response was YES. [2024-06-04 15:19:43,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94573 conditions, 16886 events. 12148/16886 cut-off events. For 279593/279687 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 93966 event pairs, 5166 based on Foata normal form. 68/16822 useless extension candidates. Maximal degree in co-relation 94525. Up to 15282 conditions per place. [2024-06-04 15:19:43,879 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 113 selfloop transitions, 124 changer transitions 0/244 dead transitions. [2024-06-04 15:19:43,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 244 transitions, 3192 flow [2024-06-04 15:19:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 15:19:43,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-04 15:19:43,880 INFO L175 Difference]: Start difference. First operand has 115 places, 198 transitions, 2382 flow. Second operand 7 states and 182 transitions. [2024-06-04 15:19:43,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 244 transitions, 3192 flow [2024-06-04 15:19:44,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 244 transitions, 2988 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 15:19:44,086 INFO L231 Difference]: Finished difference. Result has 118 places, 207 transitions, 2586 flow [2024-06-04 15:19:44,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2586, PETRI_PLACES=118, PETRI_TRANSITIONS=207} [2024-06-04 15:19:44,087 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2024-06-04 15:19:44,087 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 207 transitions, 2586 flow [2024-06-04 15:19:44,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:44,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:44,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:44,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 15:19:44,088 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:19:44,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:44,088 INFO L85 PathProgramCache]: Analyzing trace with hash -799239303, now seen corresponding path program 1 times [2024-06-04 15:19:44,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:44,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932717386] [2024-06-04 15:19:44,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:44,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:44,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:44,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932717386] [2024-06-04 15:19:44,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932717386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:44,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:44,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:19:44,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894264762] [2024-06-04 15:19:44,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:44,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:19:44,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:44,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:19:44,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:19:44,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-04 15:19:44,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 207 transitions, 2586 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:44,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:44,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-04 15:19:44,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:47,004 INFO L124 PetriNetUnfolderBase]: 10739/15686 cut-off events. [2024-06-04 15:19:47,005 INFO L125 PetriNetUnfolderBase]: For 266673/266675 co-relation queries the response was YES. [2024-06-04 15:19:47,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86999 conditions, 15686 events. 10739/15686 cut-off events. For 266673/266675 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 93545 event pairs, 4440 based on Foata normal form. 4/15670 useless extension candidates. Maximal degree in co-relation 86950. Up to 14517 conditions per place. [2024-06-04 15:19:47,134 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 208 selfloop transitions, 14 changer transitions 0/230 dead transitions. [2024-06-04 15:19:47,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 230 transitions, 3130 flow [2024-06-04 15:19:47,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:19:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:19:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 15:19:47,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4506172839506173 [2024-06-04 15:19:47,139 INFO L175 Difference]: Start difference. First operand has 118 places, 207 transitions, 2586 flow. Second operand 6 states and 146 transitions. [2024-06-04 15:19:47,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 230 transitions, 3130 flow [2024-06-04 15:19:47,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 230 transitions, 2918 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-04 15:19:47,371 INFO L231 Difference]: Finished difference. Result has 120 places, 211 transitions, 2461 flow [2024-06-04 15:19:47,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2461, PETRI_PLACES=120, PETRI_TRANSITIONS=211} [2024-06-04 15:19:47,371 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-04 15:19:47,372 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 211 transitions, 2461 flow [2024-06-04 15:19:47,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:47,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:47,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:47,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 15:19:47,372 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)] === [2024-06-04 15:19:47,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:47,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1742206855, now seen corresponding path program 1 times [2024-06-04 15:19:47,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:47,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107624751] [2024-06-04 15:19:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:47,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:48,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:48,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107624751] [2024-06-04 15:19:48,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107624751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:48,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:48,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:19:48,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965584562] [2024-06-04 15:19:48,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:48,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:19:48,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:19:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:19:48,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:48,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 211 transitions, 2461 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:48,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:48,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:48,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:50,578 INFO L124 PetriNetUnfolderBase]: 12170/17127 cut-off events. [2024-06-04 15:19:50,579 INFO L125 PetriNetUnfolderBase]: For 329156/329194 co-relation queries the response was YES. [2024-06-04 15:19:50,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99020 conditions, 17127 events. 12170/17127 cut-off events. For 329156/329194 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 96763 event pairs, 3966 based on Foata normal form. 38/17141 useless extension candidates. Maximal degree in co-relation 98969. Up to 16039 conditions per place. [2024-06-04 15:19:50,690 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 209 selfloop transitions, 41 changer transitions 0/257 dead transitions. [2024-06-04 15:19:50,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 257 transitions, 3311 flow [2024-06-04 15:19:50,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:50,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 15:19:50,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-04 15:19:50,692 INFO L175 Difference]: Start difference. First operand has 120 places, 211 transitions, 2461 flow. Second operand 7 states and 180 transitions. [2024-06-04 15:19:50,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 257 transitions, 3311 flow [2024-06-04 15:19:50,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 257 transitions, 3254 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 15:19:50,900 INFO L231 Difference]: Finished difference. Result has 123 places, 217 transitions, 2622 flow [2024-06-04 15:19:50,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2622, PETRI_PLACES=123, PETRI_TRANSITIONS=217} [2024-06-04 15:19:50,901 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 66 predicate places. [2024-06-04 15:19:50,901 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 217 transitions, 2622 flow [2024-06-04 15:19:50,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:50,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:50,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:50,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 15:19:50,902 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)] === [2024-06-04 15:19:50,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 549472531, now seen corresponding path program 2 times [2024-06-04 15:19:50,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:50,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664002680] [2024-06-04 15:19:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:50,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:51,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:51,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:51,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664002680] [2024-06-04 15:19:51,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664002680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:51,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:51,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 15:19:51,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858112559] [2024-06-04 15:19:51,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:51,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 15:19:51,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:51,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 15:19:51,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 15:19:51,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:51,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 217 transitions, 2622 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:51,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:51,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:51,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:53,980 INFO L124 PetriNetUnfolderBase]: 12155/17101 cut-off events. [2024-06-04 15:19:53,981 INFO L125 PetriNetUnfolderBase]: For 364506/364528 co-relation queries the response was YES. [2024-06-04 15:19:54,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101788 conditions, 17101 events. 12155/17101 cut-off events. For 364506/364528 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 96543 event pairs, 4726 based on Foata normal form. 22/17097 useless extension candidates. Maximal degree in co-relation 101736. Up to 16154 conditions per place. [2024-06-04 15:19:54,165 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 208 selfloop transitions, 40 changer transitions 0/255 dead transitions. [2024-06-04 15:19:54,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 255 transitions, 3248 flow [2024-06-04 15:19:54,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 15:19:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 15:19:54,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 15:19:54,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-04 15:19:54,174 INFO L175 Difference]: Start difference. First operand has 123 places, 217 transitions, 2622 flow. Second operand 7 states and 177 transitions. [2024-06-04 15:19:54,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 255 transitions, 3248 flow [2024-06-04 15:19:54,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 255 transitions, 3112 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-04 15:19:54,670 INFO L231 Difference]: Finished difference. Result has 127 places, 217 transitions, 2578 flow [2024-06-04 15:19:54,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2578, PETRI_PLACES=127, PETRI_TRANSITIONS=217} [2024-06-04 15:19:54,677 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 70 predicate places. [2024-06-04 15:19:54,677 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 217 transitions, 2578 flow [2024-06-04 15:19:54,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:19:54,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:54,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:54,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 15:19:54,680 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)] === [2024-06-04 15:19:54,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:54,680 INFO L85 PathProgramCache]: Analyzing trace with hash 664948399, now seen corresponding path program 1 times [2024-06-04 15:19:54,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:54,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096482664] [2024-06-04 15:19:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:54,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:19:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:19:55,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:19:55,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096482664] [2024-06-04 15:19:55,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096482664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:19:55,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:19:55,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:19:55,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657851810] [2024-06-04 15:19:55,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:19:55,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:19:55,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:19:55,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:19:55,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:19:56,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:19:56,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 217 transitions, 2578 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) [2024-06-04 15:19:56,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:19:56,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:19:56,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:19:59,118 INFO L124 PetriNetUnfolderBase]: 12480/17511 cut-off events. [2024-06-04 15:19:59,118 INFO L125 PetriNetUnfolderBase]: For 405402/405424 co-relation queries the response was YES. [2024-06-04 15:19:59,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105545 conditions, 17511 events. 12480/17511 cut-off events. For 405402/405424 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 98974 event pairs, 4696 based on Foata normal form. 63/17528 useless extension candidates. Maximal degree in co-relation 105491. Up to 15366 conditions per place. [2024-06-04 15:19:59,265 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 135 selfloop transitions, 133 changer transitions 0/275 dead transitions. [2024-06-04 15:19:59,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 275 transitions, 3606 flow [2024-06-04 15:19:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:19:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:19:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-04 15:19:59,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-04 15:19:59,267 INFO L175 Difference]: Start difference. First operand has 127 places, 217 transitions, 2578 flow. Second operand 8 states and 218 transitions. [2024-06-04 15:19:59,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 275 transitions, 3606 flow [2024-06-04 15:19:59,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 275 transitions, 3514 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-04 15:19:59,516 INFO L231 Difference]: Finished difference. Result has 129 places, 221 transitions, 2850 flow [2024-06-04 15:19:59,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2850, PETRI_PLACES=129, PETRI_TRANSITIONS=221} [2024-06-04 15:19:59,516 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 72 predicate places. [2024-06-04 15:19:59,517 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 221 transitions, 2850 flow [2024-06-04 15:19:59,517 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) [2024-06-04 15:19:59,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:19:59,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:19:59,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 15:19:59,517 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:19:59,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:19:59,518 INFO L85 PathProgramCache]: Analyzing trace with hash 968856900, now seen corresponding path program 1 times [2024-06-04 15:19:59,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:19:59,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492051783] [2024-06-04 15:19:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:19:59,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:19:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:00,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:00,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492051783] [2024-06-04 15:20:00,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492051783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:00,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:00,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:20:00,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541308449] [2024-06-04 15:20:00,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:00,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:20:00,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:00,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:20:00,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:20:00,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:20:00,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 221 transitions, 2850 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:00,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:00,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:20:00,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:03,035 INFO L124 PetriNetUnfolderBase]: 12503/17539 cut-off events. [2024-06-04 15:20:03,035 INFO L125 PetriNetUnfolderBase]: For 434308/434324 co-relation queries the response was YES. [2024-06-04 15:20:03,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110566 conditions, 17539 events. 12503/17539 cut-off events. For 434308/434324 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 98717 event pairs, 4733 based on Foata normal form. 18/17529 useless extension candidates. Maximal degree in co-relation 110511. Up to 16855 conditions per place. [2024-06-04 15:20:03,181 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 221 selfloop transitions, 29 changer transitions 0/257 dead transitions. [2024-06-04 15:20:03,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 257 transitions, 3672 flow [2024-06-04 15:20:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:20:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:20:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 15:20:03,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-04 15:20:03,183 INFO L175 Difference]: Start difference. First operand has 129 places, 221 transitions, 2850 flow. Second operand 6 states and 150 transitions. [2024-06-04 15:20:03,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 257 transitions, 3672 flow [2024-06-04 15:20:03,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 257 transitions, 3350 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 15:20:03,595 INFO L231 Difference]: Finished difference. Result has 129 places, 228 transitions, 2736 flow [2024-06-04 15:20:03,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2540, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2736, PETRI_PLACES=129, PETRI_TRANSITIONS=228} [2024-06-04 15:20:03,596 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 72 predicate places. [2024-06-04 15:20:03,596 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 228 transitions, 2736 flow [2024-06-04 15:20:03,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:03,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:03,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:03,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 15:20:03,597 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)] === [2024-06-04 15:20:03,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:03,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1203188753, now seen corresponding path program 2 times [2024-06-04 15:20:03,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:03,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543801454] [2024-06-04 15:20:03,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:03,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:04,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:04,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543801454] [2024-06-04 15:20:04,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543801454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:04,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:04,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:20:04,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2573200] [2024-06-04 15:20:04,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:04,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:20:04,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:04,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:20:04,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:20:05,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:20:05,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 228 transitions, 2736 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) [2024-06-04 15:20:05,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:05,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:20:05,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:08,030 INFO L124 PetriNetUnfolderBase]: 12574/17609 cut-off events. [2024-06-04 15:20:08,030 INFO L125 PetriNetUnfolderBase]: For 454121/454142 co-relation queries the response was YES. [2024-06-04 15:20:08,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109965 conditions, 17609 events. 12574/17609 cut-off events. For 454121/454142 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 98937 event pairs, 4735 based on Foata normal form. 20/17558 useless extension candidates. Maximal degree in co-relation 109909. Up to 15817 conditions per place. [2024-06-04 15:20:08,305 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 134 selfloop transitions, 140 changer transitions 0/281 dead transitions. [2024-06-04 15:20:08,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 281 transitions, 3792 flow [2024-06-04 15:20:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:20:08,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:20:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-04 15:20:08,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-04 15:20:08,307 INFO L175 Difference]: Start difference. First operand has 129 places, 228 transitions, 2736 flow. Second operand 8 states and 212 transitions. [2024-06-04 15:20:08,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 281 transitions, 3792 flow [2024-06-04 15:20:08,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 281 transitions, 3458 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-04 15:20:08,617 INFO L231 Difference]: Finished difference. Result has 131 places, 232 transitions, 2784 flow [2024-06-04 15:20:08,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2784, PETRI_PLACES=131, PETRI_TRANSITIONS=232} [2024-06-04 15:20:08,618 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 74 predicate places. [2024-06-04 15:20:08,619 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 232 transitions, 2784 flow [2024-06-04 15:20:08,619 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) [2024-06-04 15:20:08,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:08,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:08,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 15:20:08,619 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:08,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:08,620 INFO L85 PathProgramCache]: Analyzing trace with hash 521413923, now seen corresponding path program 3 times [2024-06-04 15:20:08,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:08,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591516274] [2024-06-04 15:20:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:08,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:09,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:09,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:09,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591516274] [2024-06-04 15:20:09,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591516274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:09,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:09,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:20:09,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525504837] [2024-06-04 15:20:09,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:09,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:20:09,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:09,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:20:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:20:09,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:20:09,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 232 transitions, 2784 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) [2024-06-04 15:20:09,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:09,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:20:09,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:12,765 INFO L124 PetriNetUnfolderBase]: 12645/17732 cut-off events. [2024-06-04 15:20:12,766 INFO L125 PetriNetUnfolderBase]: For 496862/496891 co-relation queries the response was YES. [2024-06-04 15:20:12,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115019 conditions, 17732 events. 12645/17732 cut-off events. For 496862/496891 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 99903 event pairs, 4723 based on Foata normal form. 28/17683 useless extension candidates. Maximal degree in co-relation 114963. Up to 15922 conditions per place. [2024-06-04 15:20:12,910 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 129 selfloop transitions, 148 changer transitions 0/284 dead transitions. [2024-06-04 15:20:12,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 284 transitions, 3774 flow [2024-06-04 15:20:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:20:12,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:20:12,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-04 15:20:12,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2024-06-04 15:20:12,912 INFO L175 Difference]: Start difference. First operand has 131 places, 232 transitions, 2784 flow. Second operand 8 states and 211 transitions. [2024-06-04 15:20:12,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 284 transitions, 3774 flow [2024-06-04 15:20:13,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 284 transitions, 3426 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-04 15:20:13,252 INFO L231 Difference]: Finished difference. Result has 133 places, 236 transitions, 2842 flow [2024-06-04 15:20:13,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2842, PETRI_PLACES=133, PETRI_TRANSITIONS=236} [2024-06-04 15:20:13,253 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 76 predicate places. [2024-06-04 15:20:13,253 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 236 transitions, 2842 flow [2024-06-04 15:20:13,253 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) [2024-06-04 15:20:13,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:13,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:13,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 15:20:13,254 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)] === [2024-06-04 15:20:13,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1439660783, now seen corresponding path program 4 times [2024-06-04 15:20:13,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:13,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413393716] [2024-06-04 15:20:13,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:13,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:14,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:14,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413393716] [2024-06-04 15:20:14,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413393716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:14,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:14,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 15:20:14,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057023967] [2024-06-04 15:20:14,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:14,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 15:20:14,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:14,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 15:20:14,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 15:20:14,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:20:14,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 236 transitions, 2842 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) [2024-06-04 15:20:14,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:14,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:20:14,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:17,089 INFO L124 PetriNetUnfolderBase]: 12665/17748 cut-off events. [2024-06-04 15:20:17,089 INFO L125 PetriNetUnfolderBase]: For 532881/532910 co-relation queries the response was YES. [2024-06-04 15:20:17,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118125 conditions, 17748 events. 12665/17748 cut-off events. For 532881/532910 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 99893 event pairs, 4283 based on Foata normal form. 28/17705 useless extension candidates. Maximal degree in co-relation 118068. Up to 15362 conditions per place. [2024-06-04 15:20:17,372 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 121 selfloop transitions, 163 changer transitions 0/291 dead transitions. [2024-06-04 15:20:17,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 291 transitions, 3870 flow [2024-06-04 15:20:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 15:20:17,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 15:20:17,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-04 15:20:17,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976851851851852 [2024-06-04 15:20:17,374 INFO L175 Difference]: Start difference. First operand has 133 places, 236 transitions, 2842 flow. Second operand 8 states and 215 transitions. [2024-06-04 15:20:17,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 291 transitions, 3870 flow [2024-06-04 15:20:17,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 291 transitions, 3498 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-04 15:20:17,718 INFO L231 Difference]: Finished difference. Result has 135 places, 240 transitions, 2913 flow [2024-06-04 15:20:17,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2913, PETRI_PLACES=135, PETRI_TRANSITIONS=240} [2024-06-04 15:20:17,719 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 78 predicate places. [2024-06-04 15:20:17,719 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 240 transitions, 2913 flow [2024-06-04 15:20:17,719 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) [2024-06-04 15:20:17,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 15:20:17,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 15:20:17,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 15:20:17,720 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 15:20:17,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 15:20:17,720 INFO L85 PathProgramCache]: Analyzing trace with hash 993373560, now seen corresponding path program 2 times [2024-06-04 15:20:17,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 15:20:17,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808266504] [2024-06-04 15:20:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 15:20:17,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 15:20:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 15:20:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 15:20:18,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 15:20:18,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808266504] [2024-06-04 15:20:18,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808266504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 15:20:18,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 15:20:18,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 15:20:18,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496872842] [2024-06-04 15:20:18,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 15:20:18,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 15:20:18,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 15:20:18,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 15:20:18,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 15:20:18,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 54 [2024-06-04 15:20:18,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 240 transitions, 2913 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 15:20:18,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 15:20:18,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 54 [2024-06-04 15:20:18,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 15:20:21,092 INFO L124 PetriNetUnfolderBase]: 12654/17772 cut-off events. [2024-06-04 15:20:21,093 INFO L125 PetriNetUnfolderBase]: For 576337/576367 co-relation queries the response was YES. [2024-06-04 15:20:21,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121165 conditions, 17772 events. 12654/17772 cut-off events. For 576337/576367 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 100353 event pairs, 4735 based on Foata normal form. 23/17756 useless extension candidates. Maximal degree in co-relation 121107. Up to 17074 conditions per place. [2024-06-04 15:20:21,403 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 226 selfloop transitions, 29 changer transitions 0/262 dead transitions. [2024-06-04 15:20:21,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 262 transitions, 3505 flow [2024-06-04 15:20:21,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 15:20:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 15:20:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 15:20:21,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382716049382716 [2024-06-04 15:20:21,404 INFO L175 Difference]: Start difference. First operand has 135 places, 240 transitions, 2913 flow. Second operand 6 states and 142 transitions. [2024-06-04 15:20:21,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 262 transitions, 3505 flow