./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_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.2024-06-19_11-23-25.files/protection/mix017_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix017_pso.opt_tso.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix017_pso.opt_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-eb4cb34-m [2024-06-21 16:27:39,882 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:27:39,948 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:27:39,953 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:27:39,953 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:27:39,981 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:27:39,981 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:27:39,982 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:27:39,982 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:27:39,985 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:27:39,985 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:27:39,986 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:27:39,986 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:27:39,987 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:27:39,988 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:27:39,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:27:39,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:27:39,988 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:27:39,988 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:27:39,988 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:27:39,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:27:39,989 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:27:39,989 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:27:39,989 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:27:39,989 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:27:39,990 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:27:39,990 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:27:39,990 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:27:39,990 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:27:39,990 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:27:39,991 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:27:39,991 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:27:39,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:27:39,992 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:27:39,992 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:27:39,992 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:27:39,992 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:27:39,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:27:39,993 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:27:39,993 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:27:39,993 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:27:39,993 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:27:39,993 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:27:39,993 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:27:40,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:27:40,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:27:40,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:27:40,225 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:27:40,226 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:27:40,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix017_pso.opt_tso.opt.yml/witness.yml [2024-06-21 16:27:40,392 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:27:40,393 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:27:40,393 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i [2024-06-21 16:27:41,349 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:27:41,580 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:27:41,584 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i [2024-06-21 16:27:41,594 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/759318bd5/2f91bb2567d44993922c292ca4626cab/FLAG45efbd98d [2024-06-21 16:27:41,608 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/759318bd5/2f91bb2567d44993922c292ca4626cab [2024-06-21 16:27:41,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:27:41,610 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:27:41,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:27:41,612 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:27:41,616 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:27:41,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:27:40" (1/2) ... [2024-06-21 16:27:41,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@356d19fc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:41, skipping insertion in model container [2024-06-21 16:27:41,617 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:27:40" (1/2) ... [2024-06-21 16:27:41,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3161e56 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:27:41, skipping insertion in model container [2024-06-21 16:27:41,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:27:41" (2/2) ... [2024-06-21 16:27:41,619 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@356d19fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:41, skipping insertion in model container [2024-06-21 16:27:41,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:27:41" (2/2) ... [2024-06-21 16:27:41,620 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:27:41,708 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:27:41,709 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-21 16:27:41,709 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-21 16:27:41,709 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-21 16:27:41,709 INFO L97 edCorrectnessWitness]: Location invariant before [L873-L873] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) [2024-06-21 16:27:41,709 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:27:41,710 INFO L106 edCorrectnessWitness]: ghost_update [L867-L867] multithreaded = 1; [2024-06-21 16:27:41,743 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:27:42,032 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:27:42,040 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:27:42,175 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:27:42,204 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:27:42,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42 WrapperNode [2024-06-21 16:27:42,205 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:27:42,206 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:27:42,206 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:27:42,206 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:27:42,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,273 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 162 [2024-06-21 16:27:42,274 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:27:42,275 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:27:42,275 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:27:42,276 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:27:42,284 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,284 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,303 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,325 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]. [2024-06-21 16:27:42,329 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,329 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,365 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,375 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,376 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,378 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,380 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:27:42,381 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:27:42,381 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:27:42,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:27:42,382 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (1/1) ... [2024-06-21 16:27:42,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:27:42,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:27:42,429 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) [2024-06-21 16:27:42,452 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 [2024-06-21 16:27:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:27:42,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:27:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:27:42,467 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:27:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:27:42,467 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:27:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:27:42,468 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:27:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:27:42,468 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:27:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:27:42,468 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:27:42,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:27:42,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:27:42,470 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:27:42,584 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:27:42,586 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:27:42,901 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:27:42,902 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:27:43,064 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:27:43,065 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:27:43,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:27:43 BoogieIcfgContainer [2024-06-21 16:27:43,066 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:27:43,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:27:43,068 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:27:43,070 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:27:43,070 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:27:40" (1/4) ... [2024-06-21 16:27:43,070 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c9dace and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:27:43, skipping insertion in model container [2024-06-21 16:27:43,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:27:41" (2/4) ... [2024-06-21 16:27:43,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c9dace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:27:43, skipping insertion in model container [2024-06-21 16:27:43,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:27:42" (3/4) ... [2024-06-21 16:27:43,071 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c9dace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:27:43, skipping insertion in model container [2024-06-21 16:27:43,071 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:27:43" (4/4) ... [2024-06-21 16:27:43,073 INFO L112 eAbstractionObserver]: Analyzing ICFG mix017_pso.opt_tso.opt.i [2024-06-21 16:27:43,085 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:27:43,085 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:27:43,085 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:27:43,125 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:27:43,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 16:27:43,211 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 16:27:43,211 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:27:43,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:27:43,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 16:27:43,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 16:27:43,229 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:27:43,235 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;@7c54226a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:27:43,235 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:27:43,239 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:27:43,239 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:27:43,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:27:43,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:43,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:27:43,241 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)] === [2024-06-21 16:27:43,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:43,245 INFO L85 PathProgramCache]: Analyzing trace with hash 417558827, now seen corresponding path program 1 times [2024-06-21 16:27:43,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:43,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067489337] [2024-06-21 16:27:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:43,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:44,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:44,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067489337] [2024-06-21 16:27:44,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067489337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:44,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:44,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:27:44,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13488007] [2024-06-21 16:27:44,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:44,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:27:44,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:44,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:27:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:27:44,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 52 [2024-06-21 16:27:44,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:44,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:44,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 52 [2024-06-21 16:27:44,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:44,989 INFO L124 PetriNetUnfolderBase]: 4867/6987 cut-off events. [2024-06-21 16:27:44,989 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-06-21 16:27:45,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13899 conditions, 6987 events. 4867/6987 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 39890 event pairs, 3534 based on Foata normal form. 1/6756 useless extension candidates. Maximal degree in co-relation 13886. Up to 6693 conditions per place. [2024-06-21 16:27:45,033 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 40 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-21 16:27:45,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 223 flow [2024-06-21 16:27:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:27:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:27:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-21 16:27:45,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2024-06-21 16:27:45,044 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 103 transitions. [2024-06-21 16:27:45,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 223 flow [2024-06-21 16:27:45,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:27:45,051 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 16:27:45,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 16:27:45,056 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 16:27:45,056 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 16:27:45,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:45,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:45,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:45,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:27:45,058 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)] === [2024-06-21 16:27:45,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:45,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1842098634, now seen corresponding path program 1 times [2024-06-21 16:27:45,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:45,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869975310] [2024-06-21 16:27:45,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:45,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:45,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:45,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:45,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869975310] [2024-06-21 16:27:45,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869975310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:45,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:45,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:27:45,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411671391] [2024-06-21 16:27:45,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:45,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:27:45,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:45,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:27:45,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:27:45,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-21 16:27:45,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2024-06-21 16:27:45,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:45,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-21 16:27:45,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:46,509 INFO L124 PetriNetUnfolderBase]: 5569/7817 cut-off events. [2024-06-21 16:27:46,509 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2024-06-21 16:27:46,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18004 conditions, 7817 events. 5569/7817 cut-off events. For 1718/1718 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 43560 event pairs, 3437 based on Foata normal form. 4/7793 useless extension candidates. Maximal degree in co-relation 17992. Up to 7610 conditions per place. [2024-06-21 16:27:46,550 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 51 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-21 16:27:46,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 317 flow [2024-06-21 16:27:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:27:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:27:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-21 16:27:46,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6346153846153846 [2024-06-21 16:27:46,555 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 132 transitions. [2024-06-21 16:27:46,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 317 flow [2024-06-21 16:27:46,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 312 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:27:46,558 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 16:27:46,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 16:27:46,559 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 16:27:46,560 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 16:27:46,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2024-06-21 16:27:46,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:46,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:46,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:27:46,563 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)] === [2024-06-21 16:27:46,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:46,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1164083757, now seen corresponding path program 1 times [2024-06-21 16:27:46,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:46,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129579008] [2024-06-21 16:27:46,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:46,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:47,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:47,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129579008] [2024-06-21 16:27:47,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129579008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:47,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:47,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:27:47,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909980475] [2024-06-21 16:27:47,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:47,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:27:47,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:47,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:27:47,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:27:47,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 16:27:47,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:47,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:47,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 16:27:47,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:48,358 INFO L124 PetriNetUnfolderBase]: 7070/9853 cut-off events. [2024-06-21 16:27:48,359 INFO L125 PetriNetUnfolderBase]: For 5873/5873 co-relation queries the response was YES. [2024-06-21 16:27:48,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25287 conditions, 9853 events. 7070/9853 cut-off events. For 5873/5873 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 54646 event pairs, 3323 based on Foata normal form. 8/9824 useless extension candidates. Maximal degree in co-relation 25273. Up to 9556 conditions per place. [2024-06-21 16:27:48,464 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 69 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-21 16:27:48,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 482 flow [2024-06-21 16:27:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:27:48,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:27:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-21 16:27:48,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592948717948718 [2024-06-21 16:27:48,466 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 185 transitions. [2024-06-21 16:27:48,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 482 flow [2024-06-21 16:27:48,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 454 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 16:27:48,468 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-21 16:27:48,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-21 16:27:48,469 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-21 16:27:48,469 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-21 16:27:48,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:48,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:48,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:48,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:27:48,470 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:27:48,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:48,471 INFO L85 PathProgramCache]: Analyzing trace with hash 906520462, now seen corresponding path program 1 times [2024-06-21 16:27:48,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:48,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589399788] [2024-06-21 16:27:48,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:48,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:48,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:49,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:49,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589399788] [2024-06-21 16:27:49,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589399788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:49,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:49,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:27:49,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206851115] [2024-06-21 16:27:49,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:49,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:27:49,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:49,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:27:49,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:27:49,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:27:49,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:49,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:49,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:27:49,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:50,156 INFO L124 PetriNetUnfolderBase]: 6156/8808 cut-off events. [2024-06-21 16:27:50,157 INFO L125 PetriNetUnfolderBase]: For 9447/9447 co-relation queries the response was YES. [2024-06-21 16:27:50,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24850 conditions, 8808 events. 6156/8808 cut-off events. For 9447/9447 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 50138 event pairs, 3157 based on Foata normal form. 3/8671 useless extension candidates. Maximal degree in co-relation 24833. Up to 8408 conditions per place. [2024-06-21 16:27:50,201 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 58 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-21 16:27:50,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 443 flow [2024-06-21 16:27:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:27:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:27:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 16:27:50,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 16:27:50,203 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 135 transitions. [2024-06-21 16:27:50,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 443 flow [2024-06-21 16:27:50,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 405 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 16:27:50,210 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 264 flow [2024-06-21 16:27:50,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-21 16:27:50,211 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-06-21 16:27:50,211 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 264 flow [2024-06-21 16:27:50,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:50,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:50,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:50,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:27:50,212 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)] === [2024-06-21 16:27:50,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash 291940155, now seen corresponding path program 1 times [2024-06-21 16:27:50,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:50,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379021857] [2024-06-21 16:27:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:50,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:50,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:50,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379021857] [2024-06-21 16:27:50,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379021857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:51,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:51,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:27:51,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583155816] [2024-06-21 16:27:51,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:51,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:27:51,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:51,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:27:51,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:27:51,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:27:51,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 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) [2024-06-21 16:27:51,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:51,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:27:51,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:52,435 INFO L124 PetriNetUnfolderBase]: 7083/9870 cut-off events. [2024-06-21 16:27:52,436 INFO L125 PetriNetUnfolderBase]: For 17298/17320 co-relation queries the response was YES. [2024-06-21 16:27:52,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30678 conditions, 9870 events. 7083/9870 cut-off events. For 17298/17320 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54694 event pairs, 3545 based on Foata normal form. 5/9854 useless extension candidates. Maximal degree in co-relation 30659. Up to 9589 conditions per place. [2024-06-21 16:27:52,488 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 69 selfloop transitions, 21 changer transitions 0/98 dead transitions. [2024-06-21 16:27:52,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 98 transitions, 600 flow [2024-06-21 16:27:52,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:27:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:27:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 16:27:52,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2024-06-21 16:27:52,489 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 264 flow. Second operand 6 states and 164 transitions. [2024-06-21 16:27:52,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 98 transitions, 600 flow [2024-06-21 16:27:52,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 98 transitions, 571 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:27:52,497 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 352 flow [2024-06-21 16:27:52,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=352, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-21 16:27:52,500 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2024-06-21 16:27:52,500 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 352 flow [2024-06-21 16:27:52,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 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) [2024-06-21 16:27:52,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:52,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:52,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:27:52,501 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)] === [2024-06-21 16:27:52,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:52,501 INFO L85 PathProgramCache]: Analyzing trace with hash 314260155, now seen corresponding path program 2 times [2024-06-21 16:27:52,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:52,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400482495] [2024-06-21 16:27:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:52,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:53,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:53,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400482495] [2024-06-21 16:27:53,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400482495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:53,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:53,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:27:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35785923] [2024-06-21 16:27:53,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:53,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:27:53,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:53,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:27:53,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:27:53,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:27:53,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 352 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 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) [2024-06-21 16:27:53,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:53,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:27:53,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:54,330 INFO L124 PetriNetUnfolderBase]: 7074/9873 cut-off events. [2024-06-21 16:27:54,330 INFO L125 PetriNetUnfolderBase]: For 25336/25377 co-relation queries the response was YES. [2024-06-21 16:27:54,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33352 conditions, 9873 events. 7074/9873 cut-off events. For 25336/25377 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54683 event pairs, 3548 based on Foata normal form. 25/9879 useless extension candidates. Maximal degree in co-relation 33332. Up to 9580 conditions per place. [2024-06-21 16:27:54,384 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 63 selfloop transitions, 21 changer transitions 0/92 dead transitions. [2024-06-21 16:27:54,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 582 flow [2024-06-21 16:27:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:27:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:27:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 16:27:54,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-21 16:27:54,386 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 352 flow. Second operand 6 states and 158 transitions. [2024-06-21 16:27:54,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 582 flow [2024-06-21 16:27:54,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 536 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 16:27:54,399 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 359 flow [2024-06-21 16:27:54,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-06-21 16:27:54,400 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-21 16:27:54,400 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 359 flow [2024-06-21 16:27:54,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 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) [2024-06-21 16:27:54,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:54,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:54,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:27:54,401 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)] === [2024-06-21 16:27:54,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:54,401 INFO L85 PathProgramCache]: Analyzing trace with hash 348028649, now seen corresponding path program 1 times [2024-06-21 16:27:54,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:54,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629983770] [2024-06-21 16:27:54,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:54,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:55,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:55,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629983770] [2024-06-21 16:27:55,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629983770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:55,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:55,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:27:55,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070552666] [2024-06-21 16:27:55,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:55,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:27:55,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:55,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:27:55,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:27:55,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:27:55,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 359 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:55,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:55,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:27:55,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:56,369 INFO L124 PetriNetUnfolderBase]: 7165/10027 cut-off events. [2024-06-21 16:27:56,369 INFO L125 PetriNetUnfolderBase]: For 29083/29121 co-relation queries the response was YES. [2024-06-21 16:27:56,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34242 conditions, 10027 events. 7165/10027 cut-off events. For 29083/29121 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55671 event pairs, 3538 based on Foata normal form. 7/10016 useless extension candidates. Maximal degree in co-relation 34220. Up to 9682 conditions per place. [2024-06-21 16:27:56,433 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 87 selfloop transitions, 32 changer transitions 0/127 dead transitions. [2024-06-21 16:27:56,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 127 transitions, 818 flow [2024-06-21 16:27:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:27:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:27:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 16:27:56,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5120192307692307 [2024-06-21 16:27:56,435 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 359 flow. Second operand 8 states and 213 transitions. [2024-06-21 16:27:56,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 127 transitions, 818 flow [2024-06-21 16:27:56,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 127 transitions, 744 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:27:56,452 INFO L231 Difference]: Finished difference. Result has 74 places, 87 transitions, 511 flow [2024-06-21 16:27:56,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=511, PETRI_PLACES=74, PETRI_TRANSITIONS=87} [2024-06-21 16:27:56,454 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-21 16:27:56,454 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 87 transitions, 511 flow [2024-06-21 16:27:56,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:56,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:56,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:56,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:27:56,455 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)] === [2024-06-21 16:27:56,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash 82437633, now seen corresponding path program 2 times [2024-06-21 16:27:56,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:56,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162906342] [2024-06-21 16:27:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:56,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:57,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:57,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162906342] [2024-06-21 16:27:57,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162906342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:57,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:57,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:27:57,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79439873] [2024-06-21 16:27:57,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:57,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:27:57,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:27:57,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:27:57,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:27:57,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 511 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:57,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:57,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:27:57,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:27:58,593 INFO L124 PetriNetUnfolderBase]: 7187/10056 cut-off events. [2024-06-21 16:27:58,593 INFO L125 PetriNetUnfolderBase]: For 39663/39727 co-relation queries the response was YES. [2024-06-21 16:27:58,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37264 conditions, 10056 events. 7187/10056 cut-off events. For 39663/39727 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55536 event pairs, 3508 based on Foata normal form. 11/10047 useless extension candidates. Maximal degree in co-relation 37240. Up to 9689 conditions per place. [2024-06-21 16:27:58,636 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 87 selfloop transitions, 34 changer transitions 0/129 dead transitions. [2024-06-21 16:27:58,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 923 flow [2024-06-21 16:27:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:27:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:27:58,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 16:27:58,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5137362637362637 [2024-06-21 16:27:58,637 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 511 flow. Second operand 7 states and 187 transitions. [2024-06-21 16:27:58,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 923 flow [2024-06-21 16:27:58,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 129 transitions, 865 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 16:27:58,651 INFO L231 Difference]: Finished difference. Result has 78 places, 91 transitions, 588 flow [2024-06-21 16:27:58,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=78, PETRI_TRANSITIONS=91} [2024-06-21 16:27:58,652 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 23 predicate places. [2024-06-21 16:27:58,653 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 91 transitions, 588 flow [2024-06-21 16:27:58,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:58,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:27:58,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:27:58,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:27:58,653 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)] === [2024-06-21 16:27:58,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:27:58,654 INFO L85 PathProgramCache]: Analyzing trace with hash -608587727, now seen corresponding path program 3 times [2024-06-21 16:27:58,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:27:58,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153190209] [2024-06-21 16:27:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:27:58,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:27:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:27:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:27:59,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:27:59,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153190209] [2024-06-21 16:27:59,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153190209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:27:59,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:27:59,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:27:59,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725537926] [2024-06-21 16:27:59,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:27:59,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:27:59,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:27:59,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:27:59,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:27:59,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:27:59,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 91 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:27:59,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:27:59,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:27:59,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:00,766 INFO L124 PetriNetUnfolderBase]: 7209/10083 cut-off events. [2024-06-21 16:28:00,766 INFO L125 PetriNetUnfolderBase]: For 51784/51842 co-relation queries the response was YES. [2024-06-21 16:28:00,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40139 conditions, 10083 events. 7209/10083 cut-off events. For 51784/51842 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55972 event pairs, 3397 based on Foata normal form. 21/10085 useless extension candidates. Maximal degree in co-relation 40114. Up to 9633 conditions per place. [2024-06-21 16:28:00,821 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 77 selfloop transitions, 50 changer transitions 0/135 dead transitions. [2024-06-21 16:28:00,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 135 transitions, 1100 flow [2024-06-21 16:28:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:28:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:28:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-21 16:28:00,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2024-06-21 16:28:00,824 INFO L175 Difference]: Start difference. First operand has 78 places, 91 transitions, 588 flow. Second operand 7 states and 191 transitions. [2024-06-21 16:28:00,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 135 transitions, 1100 flow [2024-06-21 16:28:00,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 135 transitions, 981 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:00,847 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 694 flow [2024-06-21 16:28:00,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2024-06-21 16:28:00,848 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 25 predicate places. [2024-06-21 16:28:00,848 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 694 flow [2024-06-21 16:28:00,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:00,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:00,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:00,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:28:00,849 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)] === [2024-06-21 16:28:00,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:00,849 INFO L85 PathProgramCache]: Analyzing trace with hash 90482113, now seen corresponding path program 4 times [2024-06-21 16:28:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:00,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905191016] [2024-06-21 16:28:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:00,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:01,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:01,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905191016] [2024-06-21 16:28:01,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905191016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:01,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:01,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:28:01,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477196145] [2024-06-21 16:28:01,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:01,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:28:01,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:01,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:28:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:28:01,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:01,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 694 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:01,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:01,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:01,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:03,169 INFO L124 PetriNetUnfolderBase]: 7200/10084 cut-off events. [2024-06-21 16:28:03,169 INFO L125 PetriNetUnfolderBase]: For 52623/52683 co-relation queries the response was YES. [2024-06-21 16:28:03,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40084 conditions, 10084 events. 7200/10084 cut-off events. For 52623/52683 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 56082 event pairs, 3404 based on Foata normal form. 19/10081 useless extension candidates. Maximal degree in co-relation 40058. Up to 9624 conditions per place. [2024-06-21 16:28:03,236 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 72 selfloop transitions, 50 changer transitions 0/130 dead transitions. [2024-06-21 16:28:03,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 130 transitions, 1036 flow [2024-06-21 16:28:03,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:28:03,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:28:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 16:28:03,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082417582417582 [2024-06-21 16:28:03,237 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 694 flow. Second operand 7 states and 185 transitions. [2024-06-21 16:28:03,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 130 transitions, 1036 flow [2024-06-21 16:28:03,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 130 transitions, 953 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 16:28:03,267 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 722 flow [2024-06-21 16:28:03,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=722, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-21 16:28:03,267 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 29 predicate places. [2024-06-21 16:28:03,268 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 722 flow [2024-06-21 16:28:03,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:03,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:03,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:03,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:28:03,268 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)] === [2024-06-21 16:28:03,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:03,269 INFO L85 PathProgramCache]: Analyzing trace with hash -601912373, now seen corresponding path program 1 times [2024-06-21 16:28:03,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:03,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099145640] [2024-06-21 16:28:03,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:03,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:03,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:04,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:04,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:04,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099145640] [2024-06-21 16:28:04,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099145640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:04,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:04,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:28:04,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836118897] [2024-06-21 16:28:04,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:04,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:28:04,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:04,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:28:04,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:28:04,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:04,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 722 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:04,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:04,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:04,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:05,469 INFO L124 PetriNetUnfolderBase]: 8032/11403 cut-off events. [2024-06-21 16:28:05,469 INFO L125 PetriNetUnfolderBase]: For 61254/61256 co-relation queries the response was YES. [2024-06-21 16:28:05,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44880 conditions, 11403 events. 8032/11403 cut-off events. For 61254/61256 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 63687 event pairs, 3736 based on Foata normal form. 6/11304 useless extension candidates. Maximal degree in co-relation 44852. Up to 10879 conditions per place. [2024-06-21 16:28:05,539 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 113 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2024-06-21 16:28:05,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 138 transitions, 1147 flow [2024-06-21 16:28:05,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:28:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:28:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 16:28:05,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-21 16:28:05,540 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 722 flow. Second operand 7 states and 181 transitions. [2024-06-21 16:28:05,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 138 transitions, 1147 flow [2024-06-21 16:28:05,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 138 transitions, 1006 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:28:05,575 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 703 flow [2024-06-21 16:28:05,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=703, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-21 16:28:05,576 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-21 16:28:05,576 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 703 flow [2024-06-21 16:28:05,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:05,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:05,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:05,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:28:05,576 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:05,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:05,577 INFO L85 PathProgramCache]: Analyzing trace with hash -520331166, now seen corresponding path program 1 times [2024-06-21 16:28:05,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:05,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45825539] [2024-06-21 16:28:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:05,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:06,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:06,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45825539] [2024-06-21 16:28:06,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45825539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:06,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:06,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:28:06,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353628145] [2024-06-21 16:28:06,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:06,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:28:06,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:06,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:28:06,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:28:06,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:28:06,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 703 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 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) [2024-06-21 16:28:06,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:06,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:28:06,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:07,300 INFO L124 PetriNetUnfolderBase]: 7529/11015 cut-off events. [2024-06-21 16:28:07,300 INFO L125 PetriNetUnfolderBase]: For 72649/72669 co-relation queries the response was YES. [2024-06-21 16:28:07,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45671 conditions, 11015 events. 7529/11015 cut-off events. For 72649/72669 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 64520 event pairs, 3781 based on Foata normal form. 22/10994 useless extension candidates. Maximal degree in co-relation 45641. Up to 10255 conditions per place. [2024-06-21 16:28:07,368 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 102 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2024-06-21 16:28:07,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 125 transitions, 1009 flow [2024-06-21 16:28:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:28:07,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:28:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-21 16:28:07,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-06-21 16:28:07,370 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 703 flow. Second operand 5 states and 132 transitions. [2024-06-21 16:28:07,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 125 transitions, 1009 flow [2024-06-21 16:28:07,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 949 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:28:07,419 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 716 flow [2024-06-21 16:28:07,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=643, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=716, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2024-06-21 16:28:07,419 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 32 predicate places. [2024-06-21 16:28:07,419 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 716 flow [2024-06-21 16:28:07,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 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) [2024-06-21 16:28:07,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:07,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:07,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:28:07,420 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)] === [2024-06-21 16:28:07,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:07,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1910335936, now seen corresponding path program 1 times [2024-06-21 16:28:07,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:07,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461870851] [2024-06-21 16:28:07,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:07,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:08,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:08,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461870851] [2024-06-21 16:28:08,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461870851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:08,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:08,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:08,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801886050] [2024-06-21 16:28:08,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:08,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:08,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:08,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:08,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:08,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:08,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 716 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:08,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:08,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:08,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:10,136 INFO L124 PetriNetUnfolderBase]: 9228/12909 cut-off events. [2024-06-21 16:28:10,136 INFO L125 PetriNetUnfolderBase]: For 110617/110673 co-relation queries the response was YES. [2024-06-21 16:28:10,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59095 conditions, 12909 events. 9228/12909 cut-off events. For 110617/110673 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 72758 event pairs, 3328 based on Foata normal form. 42/12949 useless extension candidates. Maximal degree in co-relation 59064. Up to 12078 conditions per place. [2024-06-21 16:28:10,226 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 126 selfloop transitions, 41 changer transitions 0/176 dead transitions. [2024-06-21 16:28:10,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 176 transitions, 1404 flow [2024-06-21 16:28:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:10,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-21 16:28:10,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213675213675214 [2024-06-21 16:28:10,227 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 716 flow. Second operand 9 states and 244 transitions. [2024-06-21 16:28:10,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 176 transitions, 1404 flow [2024-06-21 16:28:10,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 176 transitions, 1361 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-21 16:28:10,281 INFO L231 Difference]: Finished difference. Result has 93 places, 114 transitions, 844 flow [2024-06-21 16:28:10,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=844, PETRI_PLACES=93, PETRI_TRANSITIONS=114} [2024-06-21 16:28:10,281 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 38 predicate places. [2024-06-21 16:28:10,281 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 114 transitions, 844 flow [2024-06-21 16:28:10,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:10,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:10,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:10,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:28:10,282 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:10,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash -233731230, now seen corresponding path program 2 times [2024-06-21 16:28:10,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:10,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174591472] [2024-06-21 16:28:10,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:10,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:11,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:11,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174591472] [2024-06-21 16:28:11,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174591472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:11,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:11,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:11,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305383700] [2024-06-21 16:28:11,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:11,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:11,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:11,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:11,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:11,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:11,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 114 transitions, 844 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:11,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:11,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:11,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:12,922 INFO L124 PetriNetUnfolderBase]: 9174/12847 cut-off events. [2024-06-21 16:28:12,923 INFO L125 PetriNetUnfolderBase]: For 126044/126100 co-relation queries the response was YES. [2024-06-21 16:28:12,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60528 conditions, 12847 events. 9174/12847 cut-off events. For 126044/126100 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 72531 event pairs, 3828 based on Foata normal form. 48/12893 useless extension candidates. Maximal degree in co-relation 60496. Up to 12228 conditions per place. [2024-06-21 16:28:13,016 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 118 selfloop transitions, 36 changer transitions 0/163 dead transitions. [2024-06-21 16:28:13,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 163 transitions, 1324 flow [2024-06-21 16:28:13,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:13,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:13,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 16:28:13,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-21 16:28:13,017 INFO L175 Difference]: Start difference. First operand has 93 places, 114 transitions, 844 flow. Second operand 8 states and 214 transitions. [2024-06-21 16:28:13,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 163 transitions, 1324 flow [2024-06-21 16:28:13,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 163 transitions, 1255 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:13,088 INFO L231 Difference]: Finished difference. Result has 96 places, 114 transitions, 859 flow [2024-06-21 16:28:13,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=859, PETRI_PLACES=96, PETRI_TRANSITIONS=114} [2024-06-21 16:28:13,089 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-21 16:28:13,089 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 114 transitions, 859 flow [2024-06-21 16:28:13,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:13,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:13,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:13,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:28:13,090 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)] === [2024-06-21 16:28:13,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:13,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2028484066, now seen corresponding path program 3 times [2024-06-21 16:28:13,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:13,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098827895] [2024-06-21 16:28:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:13,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:14,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:14,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:14,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098827895] [2024-06-21 16:28:14,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098827895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:14,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:14,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:14,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956853063] [2024-06-21 16:28:14,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:14,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:14,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:14,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:14,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:14,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:14,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 114 transitions, 859 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:14,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:14,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:14,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:15,747 INFO L124 PetriNetUnfolderBase]: 9280/13018 cut-off events. [2024-06-21 16:28:15,747 INFO L125 PetriNetUnfolderBase]: For 139547/139589 co-relation queries the response was YES. [2024-06-21 16:28:15,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62376 conditions, 13018 events. 9280/13018 cut-off events. For 139547/139589 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 73988 event pairs, 3878 based on Foata normal form. 56/13067 useless extension candidates. Maximal degree in co-relation 62342. Up to 12301 conditions per place. [2024-06-21 16:28:15,845 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 96 selfloop transitions, 55 changer transitions 0/160 dead transitions. [2024-06-21 16:28:15,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 160 transitions, 1351 flow [2024-06-21 16:28:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 16:28:15,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168269230769231 [2024-06-21 16:28:15,846 INFO L175 Difference]: Start difference. First operand has 96 places, 114 transitions, 859 flow. Second operand 8 states and 215 transitions. [2024-06-21 16:28:15,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 160 transitions, 1351 flow [2024-06-21 16:28:15,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 160 transitions, 1269 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:28:15,928 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 943 flow [2024-06-21 16:28:15,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-21 16:28:15,929 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 42 predicate places. [2024-06-21 16:28:15,929 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 943 flow [2024-06-21 16:28:15,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:15,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:15,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:15,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:28:15,930 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)] === [2024-06-21 16:28:15,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash 2028668764, now seen corresponding path program 1 times [2024-06-21 16:28:15,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:15,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693052039] [2024-06-21 16:28:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:15,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:16,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:16,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693052039] [2024-06-21 16:28:16,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693052039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:16,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:16,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:16,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917819650] [2024-06-21 16:28:16,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:16,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:16,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:16,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:16,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:17,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:28:17,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 943 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:17,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:17,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:28:17,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:18,631 INFO L124 PetriNetUnfolderBase]: 9660/13488 cut-off events. [2024-06-21 16:28:18,631 INFO L125 PetriNetUnfolderBase]: For 158809/158817 co-relation queries the response was YES. [2024-06-21 16:28:18,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64891 conditions, 13488 events. 9660/13488 cut-off events. For 158809/158817 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 74249 event pairs, 4192 based on Foata normal form. 14/13497 useless extension candidates. Maximal degree in co-relation 64856. Up to 13013 conditions per place. [2024-06-21 16:28:18,740 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 126 selfloop transitions, 35 changer transitions 0/168 dead transitions. [2024-06-21 16:28:18,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 168 transitions, 1494 flow [2024-06-21 16:28:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:28:18,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-21 16:28:18,743 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 943 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:28:18,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 168 transitions, 1494 flow [2024-06-21 16:28:18,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 168 transitions, 1364 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 16:28:18,851 INFO L231 Difference]: Finished difference. Result has 100 places, 123 transitions, 986 flow [2024-06-21 16:28:18,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=819, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=986, PETRI_PLACES=100, PETRI_TRANSITIONS=123} [2024-06-21 16:28:18,852 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 45 predicate places. [2024-06-21 16:28:18,852 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 123 transitions, 986 flow [2024-06-21 16:28:18,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:18,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:18,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:18,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:28:18,853 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:18,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:18,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2132625757, now seen corresponding path program 1 times [2024-06-21 16:28:18,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:18,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634943008] [2024-06-21 16:28:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:18,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:19,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:19,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634943008] [2024-06-21 16:28:19,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634943008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:19,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:19,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:28:19,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430104123] [2024-06-21 16:28:19,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:19,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:28:19,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:19,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:28:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:28:19,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:19,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 123 transitions, 986 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:19,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:19,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:19,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:21,040 INFO L124 PetriNetUnfolderBase]: 9163/12970 cut-off events. [2024-06-21 16:28:21,040 INFO L125 PetriNetUnfolderBase]: For 178060/178077 co-relation queries the response was YES. [2024-06-21 16:28:21,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65538 conditions, 12970 events. 9163/12970 cut-off events. For 178060/178077 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73391 event pairs, 4079 based on Foata normal form. 23/12968 useless extension candidates. Maximal degree in co-relation 65501. Up to 12327 conditions per place. [2024-06-21 16:28:21,274 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 110 selfloop transitions, 35 changer transitions 0/159 dead transitions. [2024-06-21 16:28:21,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 159 transitions, 1514 flow [2024-06-21 16:28:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:28:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:28:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 16:28:21,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 16:28:21,275 INFO L175 Difference]: Start difference. First operand has 100 places, 123 transitions, 986 flow. Second operand 6 states and 162 transitions. [2024-06-21 16:28:21,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 159 transitions, 1514 flow [2024-06-21 16:28:21,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 159 transitions, 1404 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:21,354 INFO L231 Difference]: Finished difference. Result has 101 places, 131 transitions, 1063 flow [2024-06-21 16:28:21,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1063, PETRI_PLACES=101, PETRI_TRANSITIONS=131} [2024-06-21 16:28:21,355 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-21 16:28:21,355 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 131 transitions, 1063 flow [2024-06-21 16:28:21,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:21,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:21,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:21,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:28:21,355 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:21,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1146173714, now seen corresponding path program 4 times [2024-06-21 16:28:21,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:21,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353056573] [2024-06-21 16:28:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:21,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:21,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:22,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:22,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:22,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353056573] [2024-06-21 16:28:22,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353056573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:22,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:22,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:22,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16535994] [2024-06-21 16:28:22,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:22,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:22,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:22,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:22,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:22,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:22,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 131 transitions, 1063 flow. Second operand has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:22,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:22,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:22,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:24,159 INFO L124 PetriNetUnfolderBase]: 9352/13187 cut-off events. [2024-06-21 16:28:24,159 INFO L125 PetriNetUnfolderBase]: For 205612/205656 co-relation queries the response was YES. [2024-06-21 16:28:24,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70096 conditions, 13187 events. 9352/13187 cut-off events. For 205612/205656 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 75047 event pairs, 4002 based on Foata normal form. 62/13241 useless extension candidates. Maximal degree in co-relation 70058. Up to 12400 conditions per place. [2024-06-21 16:28:24,256 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 108 selfloop transitions, 57 changer transitions 0/175 dead transitions. [2024-06-21 16:28:24,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 175 transitions, 1589 flow [2024-06-21 16:28:24,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:24,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 16:28:24,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-21 16:28:24,258 INFO L175 Difference]: Start difference. First operand has 101 places, 131 transitions, 1063 flow. Second operand 8 states and 212 transitions. [2024-06-21 16:28:24,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 175 transitions, 1589 flow [2024-06-21 16:28:24,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 175 transitions, 1543 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 16:28:24,372 INFO L231 Difference]: Finished difference. Result has 107 places, 133 transitions, 1197 flow [2024-06-21 16:28:24,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1197, PETRI_PLACES=107, PETRI_TRANSITIONS=133} [2024-06-21 16:28:24,372 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-21 16:28:24,373 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 133 transitions, 1197 flow [2024-06-21 16:28:24,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.333333333333334) internal successors, (138), 9 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:24,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:24,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:24,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:28:24,373 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)] === [2024-06-21 16:28:24,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:24,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1152614522, now seen corresponding path program 2 times [2024-06-21 16:28:24,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:24,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569579647] [2024-06-21 16:28:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:24,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:25,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:25,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569579647] [2024-06-21 16:28:25,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569579647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:25,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:25,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:25,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729347780] [2024-06-21 16:28:25,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:25,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:25,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:25,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:25,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:25,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:28:25,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 133 transitions, 1197 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:25,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:25,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:28:25,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:27,207 INFO L124 PetriNetUnfolderBase]: 9844/13806 cut-off events. [2024-06-21 16:28:27,207 INFO L125 PetriNetUnfolderBase]: For 226704/226721 co-relation queries the response was YES. [2024-06-21 16:28:27,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74090 conditions, 13806 events. 9844/13806 cut-off events. For 226704/226721 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 76533 event pairs, 4188 based on Foata normal form. 20/13822 useless extension candidates. Maximal degree in co-relation 74050. Up to 13270 conditions per place. [2024-06-21 16:28:27,306 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 136 selfloop transitions, 43 changer transitions 0/186 dead transitions. [2024-06-21 16:28:27,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 186 transitions, 1821 flow [2024-06-21 16:28:27,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 16:28:27,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 16:28:27,307 INFO L175 Difference]: Start difference. First operand has 107 places, 133 transitions, 1197 flow. Second operand 8 states and 202 transitions. [2024-06-21 16:28:27,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 186 transitions, 1821 flow [2024-06-21 16:28:27,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 186 transitions, 1671 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:28:27,448 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 1291 flow [2024-06-21 16:28:27,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1291, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2024-06-21 16:28:27,448 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 55 predicate places. [2024-06-21 16:28:27,449 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 1291 flow [2024-06-21 16:28:27,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:27,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:27,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:27,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:28:27,449 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)] === [2024-06-21 16:28:27,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:27,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1152853532, now seen corresponding path program 3 times [2024-06-21 16:28:27,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:27,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975543559] [2024-06-21 16:28:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:27,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:27,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:28,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:28,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975543559] [2024-06-21 16:28:28,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975543559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:28,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:28,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:28,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645490299] [2024-06-21 16:28:28,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:28,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:28,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:28,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:28,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:28,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:28:28,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 1291 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:28,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:28,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:28:28,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:30,037 INFO L124 PetriNetUnfolderBase]: 9880/13842 cut-off events. [2024-06-21 16:28:30,037 INFO L125 PetriNetUnfolderBase]: For 251228/251245 co-relation queries the response was YES. [2024-06-21 16:28:30,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76981 conditions, 13842 events. 9880/13842 cut-off events. For 251228/251245 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 76576 event pairs, 3895 based on Foata normal form. 20/13858 useless extension candidates. Maximal degree in co-relation 76939. Up to 13185 conditions per place. [2024-06-21 16:28:30,142 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 135 selfloop transitions, 54 changer transitions 0/196 dead transitions. [2024-06-21 16:28:30,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 196 transitions, 2057 flow [2024-06-21 16:28:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:30,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:28:30,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-21 16:28:30,143 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 1291 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:28:30,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 196 transitions, 2057 flow [2024-06-21 16:28:30,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 196 transitions, 1949 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-21 16:28:30,300 INFO L231 Difference]: Finished difference. Result has 115 places, 150 transitions, 1443 flow [2024-06-21 16:28:30,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1183, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1443, PETRI_PLACES=115, PETRI_TRANSITIONS=150} [2024-06-21 16:28:30,300 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-21 16:28:30,300 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 150 transitions, 1443 flow [2024-06-21 16:28:30,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:30,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:30,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:30,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:28:30,301 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)] === [2024-06-21 16:28:30,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:30,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1146358412, now seen corresponding path program 4 times [2024-06-21 16:28:30,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:30,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932581506] [2024-06-21 16:28:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:30,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:31,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:31,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932581506] [2024-06-21 16:28:31,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932581506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:31,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:31,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:28:31,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076860949] [2024-06-21 16:28:31,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:31,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:28:31,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:31,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:28:31,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:28:31,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:28:31,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 150 transitions, 1443 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:31,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:31,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:28:31,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:32,954 INFO L124 PetriNetUnfolderBase]: 9865/13813 cut-off events. [2024-06-21 16:28:32,954 INFO L125 PetriNetUnfolderBase]: For 277019/277036 co-relation queries the response was YES. [2024-06-21 16:28:33,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77710 conditions, 13813 events. 9865/13813 cut-off events. For 277019/277036 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 76307 event pairs, 4185 based on Foata normal form. 20/13829 useless extension candidates. Maximal degree in co-relation 77667. Up to 13301 conditions per place. [2024-06-21 16:28:33,061 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 143 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-21 16:28:33,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 192 transitions, 1953 flow [2024-06-21 16:28:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:28:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:28:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:28:33,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-21 16:28:33,064 INFO L175 Difference]: Start difference. First operand has 115 places, 150 transitions, 1443 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:28:33,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 192 transitions, 1953 flow [2024-06-21 16:28:33,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 192 transitions, 1799 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 16:28:33,263 INFO L231 Difference]: Finished difference. Result has 119 places, 150 transitions, 1383 flow [2024-06-21 16:28:33,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1289, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1383, PETRI_PLACES=119, PETRI_TRANSITIONS=150} [2024-06-21 16:28:33,263 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-21 16:28:33,264 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 150 transitions, 1383 flow [2024-06-21 16:28:33,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:33,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:33,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:33,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:28:33,264 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)] === [2024-06-21 16:28:33,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:33,264 INFO L85 PathProgramCache]: Analyzing trace with hash 2085074461, now seen corresponding path program 2 times [2024-06-21 16:28:33,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:33,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149094390] [2024-06-21 16:28:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:33,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:33,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:33,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:33,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149094390] [2024-06-21 16:28:33,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149094390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:33,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:33,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:28:33,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008236666] [2024-06-21 16:28:33,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:33,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:28:33,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:33,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:28:33,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:28:33,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:33,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 150 transitions, 1383 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:33,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:33,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:33,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:35,503 INFO L124 PetriNetUnfolderBase]: 9268/13150 cut-off events. [2024-06-21 16:28:35,503 INFO L125 PetriNetUnfolderBase]: For 288046/288061 co-relation queries the response was YES. [2024-06-21 16:28:35,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74609 conditions, 13150 events. 9268/13150 cut-off events. For 288046/288061 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 74629 event pairs, 4089 based on Foata normal form. 21/13135 useless extension candidates. Maximal degree in co-relation 74564. Up to 12492 conditions per place. [2024-06-21 16:28:35,609 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 116 selfloop transitions, 35 changer transitions 0/170 dead transitions. [2024-06-21 16:28:35,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 170 transitions, 1745 flow [2024-06-21 16:28:35,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:28:35,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:28:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 16:28:35,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-21 16:28:35,610 INFO L175 Difference]: Start difference. First operand has 119 places, 150 transitions, 1383 flow. Second operand 6 states and 153 transitions. [2024-06-21 16:28:35,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 170 transitions, 1745 flow [2024-06-21 16:28:35,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 170 transitions, 1581 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 16:28:35,799 INFO L231 Difference]: Finished difference. Result has 116 places, 150 transitions, 1298 flow [2024-06-21 16:28:35,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1298, PETRI_PLACES=116, PETRI_TRANSITIONS=150} [2024-06-21 16:28:35,800 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 61 predicate places. [2024-06-21 16:28:35,800 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 150 transitions, 1298 flow [2024-06-21 16:28:35,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:35,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:35,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:35,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:28:35,800 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:35,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:35,801 INFO L85 PathProgramCache]: Analyzing trace with hash 2034632597, now seen corresponding path program 1 times [2024-06-21 16:28:35,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:35,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342258722] [2024-06-21 16:28:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:35,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:36,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:36,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:36,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342258722] [2024-06-21 16:28:36,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342258722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:36,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:36,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:28:36,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579823218] [2024-06-21 16:28:36,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:36,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:28:36,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:28:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:28:36,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:36,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 150 transitions, 1298 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:36,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:36,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:36,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:37,989 INFO L124 PetriNetUnfolderBase]: 8719/12540 cut-off events. [2024-06-21 16:28:37,989 INFO L125 PetriNetUnfolderBase]: For 265787/265789 co-relation queries the response was YES. [2024-06-21 16:28:38,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70756 conditions, 12540 events. 8719/12540 cut-off events. For 265787/265789 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 71642 event pairs, 3537 based on Foata normal form. 4/12444 useless extension candidates. Maximal degree in co-relation 70712. Up to 11874 conditions per place. [2024-06-21 16:28:38,087 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 155 selfloop transitions, 21 changer transitions 0/184 dead transitions. [2024-06-21 16:28:38,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 184 transitions, 1918 flow [2024-06-21 16:28:38,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:28:38,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:28:38,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 16:28:38,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-21 16:28:38,088 INFO L175 Difference]: Start difference. First operand has 116 places, 150 transitions, 1298 flow. Second operand 6 states and 159 transitions. [2024-06-21 16:28:38,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 184 transitions, 1918 flow [2024-06-21 16:28:38,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 184 transitions, 1817 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:38,285 INFO L231 Difference]: Finished difference. Result has 117 places, 158 transitions, 1364 flow [2024-06-21 16:28:38,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1364, PETRI_PLACES=117, PETRI_TRANSITIONS=158} [2024-06-21 16:28:38,286 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 62 predicate places. [2024-06-21 16:28:38,286 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 158 transitions, 1364 flow [2024-06-21 16:28:38,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:38,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:38,286 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:38,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:28:38,286 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:38,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:38,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2047726997, now seen corresponding path program 2 times [2024-06-21 16:28:38,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:38,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682060347] [2024-06-21 16:28:38,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:38,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:38,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:38,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682060347] [2024-06-21 16:28:38,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682060347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:38,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:38,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:28:38,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829238103] [2024-06-21 16:28:38,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:38,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:28:38,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:38,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:28:38,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:28:39,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:39,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 158 transitions, 1364 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:39,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:39,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:39,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:40,532 INFO L124 PetriNetUnfolderBase]: 8705/12510 cut-off events. [2024-06-21 16:28:40,532 INFO L125 PetriNetUnfolderBase]: For 287621/287628 co-relation queries the response was YES. [2024-06-21 16:28:40,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73131 conditions, 12510 events. 8705/12510 cut-off events. For 287621/287628 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 71403 event pairs, 3514 based on Foata normal form. 8/12422 useless extension candidates. Maximal degree in co-relation 73086. Up to 11862 conditions per place. [2024-06-21 16:28:40,628 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 149 selfloop transitions, 21 changer transitions 0/178 dead transitions. [2024-06-21 16:28:40,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 178 transitions, 1764 flow [2024-06-21 16:28:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:28:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:28:40,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 16:28:40,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-21 16:28:40,629 INFO L175 Difference]: Start difference. First operand has 117 places, 158 transitions, 1364 flow. Second operand 6 states and 153 transitions. [2024-06-21 16:28:40,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 178 transitions, 1764 flow [2024-06-21 16:28:40,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 178 transitions, 1674 flow, removed 40 selfloop flow, removed 2 redundant places. [2024-06-21 16:28:40,866 INFO L231 Difference]: Finished difference. Result has 121 places, 158 transitions, 1325 flow [2024-06-21 16:28:40,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1325, PETRI_PLACES=121, PETRI_TRANSITIONS=158} [2024-06-21 16:28:40,866 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-21 16:28:40,866 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 158 transitions, 1325 flow [2024-06-21 16:28:40,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:40,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:40,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:40,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:28:40,867 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)] === [2024-06-21 16:28:40,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:40,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1535776572, now seen corresponding path program 1 times [2024-06-21 16:28:40,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:40,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161663865] [2024-06-21 16:28:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:40,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:41,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:41,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:41,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161663865] [2024-06-21 16:28:41,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161663865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:41,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:41,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:41,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208251180] [2024-06-21 16:28:41,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:41,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:41,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:41,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:41,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:41,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:28:41,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 158 transitions, 1325 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:41,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:41,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:28:41,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:43,900 INFO L124 PetriNetUnfolderBase]: 10131/14232 cut-off events. [2024-06-21 16:28:43,901 INFO L125 PetriNetUnfolderBase]: For 366162/366164 co-relation queries the response was YES. [2024-06-21 16:28:43,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84986 conditions, 14232 events. 10131/14232 cut-off events. For 366162/366164 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 79072 event pairs, 4061 based on Foata normal form. 18/14245 useless extension candidates. Maximal degree in co-relation 84939. Up to 13077 conditions per place. [2024-06-21 16:28:44,019 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 143 selfloop transitions, 79 changer transitions 0/229 dead transitions. [2024-06-21 16:28:44,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 229 transitions, 2158 flow [2024-06-21 16:28:44,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-21 16:28:44,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2024-06-21 16:28:44,020 INFO L175 Difference]: Start difference. First operand has 121 places, 158 transitions, 1325 flow. Second operand 9 states and 237 transitions. [2024-06-21 16:28:44,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 229 transitions, 2158 flow [2024-06-21 16:28:44,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 229 transitions, 2099 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:44,260 INFO L231 Difference]: Finished difference. Result has 127 places, 174 transitions, 1676 flow [2024-06-21 16:28:44,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1676, PETRI_PLACES=127, PETRI_TRANSITIONS=174} [2024-06-21 16:28:44,260 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-21 16:28:44,260 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 174 transitions, 1676 flow [2024-06-21 16:28:44,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:44,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:44,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:44,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:28:44,261 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:44,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:44,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2031309132, now seen corresponding path program 2 times [2024-06-21 16:28:44,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:44,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650816778] [2024-06-21 16:28:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:44,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:45,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:45,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650816778] [2024-06-21 16:28:45,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650816778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:45,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:45,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:45,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792963792] [2024-06-21 16:28:45,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:45,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:45,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:45,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:45,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:45,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:28:45,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 174 transitions, 1676 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:45,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:45,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:28:45,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:47,312 INFO L124 PetriNetUnfolderBase]: 10373/14620 cut-off events. [2024-06-21 16:28:47,312 INFO L125 PetriNetUnfolderBase]: For 406893/406897 co-relation queries the response was YES. [2024-06-21 16:28:47,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90305 conditions, 14620 events. 10373/14620 cut-off events. For 406893/406897 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 82068 event pairs, 4115 based on Foata normal form. 18/14630 useless extension candidates. Maximal degree in co-relation 90255. Up to 13600 conditions per place. [2024-06-21 16:28:47,438 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 145 selfloop transitions, 86 changer transitions 0/238 dead transitions. [2024-06-21 16:28:47,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 238 transitions, 2481 flow [2024-06-21 16:28:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:47,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-21 16:28:47,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:28:47,441 INFO L175 Difference]: Start difference. First operand has 127 places, 174 transitions, 1676 flow. Second operand 9 states and 234 transitions. [2024-06-21 16:28:47,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 238 transitions, 2481 flow [2024-06-21 16:28:47,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 238 transitions, 2311 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 16:28:47,748 INFO L231 Difference]: Finished difference. Result has 134 places, 186 transitions, 1897 flow [2024-06-21 16:28:47,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1897, PETRI_PLACES=134, PETRI_TRANSITIONS=186} [2024-06-21 16:28:47,748 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 79 predicate places. [2024-06-21 16:28:47,748 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 186 transitions, 1897 flow [2024-06-21 16:28:47,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:47,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:47,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:47,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:28:47,749 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:47,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:47,749 INFO L85 PathProgramCache]: Analyzing trace with hash -81928074, now seen corresponding path program 3 times [2024-06-21 16:28:47,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:47,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234059764] [2024-06-21 16:28:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:47,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:48,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:48,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234059764] [2024-06-21 16:28:48,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234059764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:48,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:48,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210990877] [2024-06-21 16:28:48,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:48,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:48,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:48,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:48,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:48,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:28:48,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 186 transitions, 1897 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:48,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:48,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:28:48,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:50,700 INFO L124 PetriNetUnfolderBase]: 10557/14922 cut-off events. [2024-06-21 16:28:50,701 INFO L125 PetriNetUnfolderBase]: For 448535/448539 co-relation queries the response was YES. [2024-06-21 16:28:50,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94408 conditions, 14922 events. 10557/14922 cut-off events. For 448535/448539 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 84315 event pairs, 3801 based on Foata normal form. 18/14932 useless extension candidates. Maximal degree in co-relation 94355. Up to 12899 conditions per place. [2024-06-21 16:28:50,852 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 134 selfloop transitions, 106 changer transitions 0/247 dead transitions. [2024-06-21 16:28:50,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 247 transitions, 2845 flow [2024-06-21 16:28:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:50,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-21 16:28:50,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042735042735043 [2024-06-21 16:28:50,854 INFO L175 Difference]: Start difference. First operand has 134 places, 186 transitions, 1897 flow. Second operand 9 states and 236 transitions. [2024-06-21 16:28:50,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 247 transitions, 2845 flow [2024-06-21 16:28:51,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 247 transitions, 2696 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-21 16:28:51,314 INFO L231 Difference]: Finished difference. Result has 141 places, 192 transitions, 2196 flow [2024-06-21 16:28:51,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2196, PETRI_PLACES=141, PETRI_TRANSITIONS=192} [2024-06-21 16:28:51,314 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-21 16:28:51,314 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 192 transitions, 2196 flow [2024-06-21 16:28:51,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:51,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:51,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:51,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:28:51,315 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:51,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1177373588, now seen corresponding path program 4 times [2024-06-21 16:28:51,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:51,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529976180] [2024-06-21 16:28:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:51,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:52,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:52,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529976180] [2024-06-21 16:28:52,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529976180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:52,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:52,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:28:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001933594] [2024-06-21 16:28:52,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:52,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:28:52,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:52,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:28:52,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:28:52,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:28:52,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 192 transitions, 2196 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:52,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:52,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:28:52,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:54,467 INFO L124 PetriNetUnfolderBase]: 10518/14901 cut-off events. [2024-06-21 16:28:54,467 INFO L125 PetriNetUnfolderBase]: For 467051/467055 co-relation queries the response was YES. [2024-06-21 16:28:54,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94464 conditions, 14901 events. 10518/14901 cut-off events. For 467051/467055 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 84566 event pairs, 4142 based on Foata normal form. 18/14911 useless extension candidates. Maximal degree in co-relation 94409. Up to 13823 conditions per place. [2024-06-21 16:28:54,617 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 152 selfloop transitions, 84 changer transitions 0/243 dead transitions. [2024-06-21 16:28:54,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 243 transitions, 2804 flow [2024-06-21 16:28:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:28:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:28:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-21 16:28:54,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:28:54,618 INFO L175 Difference]: Start difference. First operand has 141 places, 192 transitions, 2196 flow. Second operand 9 states and 234 transitions. [2024-06-21 16:28:54,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 243 transitions, 2804 flow [2024-06-21 16:28:55,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 243 transitions, 2638 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 16:28:55,097 INFO L231 Difference]: Finished difference. Result has 144 places, 191 transitions, 2161 flow [2024-06-21 16:28:55,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2161, PETRI_PLACES=144, PETRI_TRANSITIONS=191} [2024-06-21 16:28:55,098 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 89 predicate places. [2024-06-21 16:28:55,098 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 191 transitions, 2161 flow [2024-06-21 16:28:55,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:55,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:55,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:55,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:28:55,099 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:55,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:55,099 INFO L85 PathProgramCache]: Analyzing trace with hash 206550813, now seen corresponding path program 1 times [2024-06-21 16:28:55,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:55,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075987590] [2024-06-21 16:28:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:55,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:55,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:55,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075987590] [2024-06-21 16:28:55,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075987590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:55,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:55,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:28:55,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770587536] [2024-06-21 16:28:55,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:55,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:28:55,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:55,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:28:55,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:28:55,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:55,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 191 transitions, 2161 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:55,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:55,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:55,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:28:57,767 INFO L124 PetriNetUnfolderBase]: 9400/13635 cut-off events. [2024-06-21 16:28:57,767 INFO L125 PetriNetUnfolderBase]: For 410567/410569 co-relation queries the response was YES. [2024-06-21 16:28:57,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85890 conditions, 13635 events. 9400/13635 cut-off events. For 410567/410569 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 79957 event pairs, 3568 based on Foata normal form. 4/13599 useless extension candidates. Maximal degree in co-relation 85833. Up to 12935 conditions per place. [2024-06-21 16:28:57,895 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 198 selfloop transitions, 18 changer transitions 0/224 dead transitions. [2024-06-21 16:28:57,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 224 transitions, 2755 flow [2024-06-21 16:28:57,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:28:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:28:57,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:28:57,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-21 16:28:57,896 INFO L175 Difference]: Start difference. First operand has 144 places, 191 transitions, 2161 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:28:57,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 224 transitions, 2755 flow [2024-06-21 16:28:58,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 224 transitions, 2477 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 16:28:58,359 INFO L231 Difference]: Finished difference. Result has 143 places, 195 transitions, 2008 flow [2024-06-21 16:28:58,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2008, PETRI_PLACES=143, PETRI_TRANSITIONS=195} [2024-06-21 16:28:58,360 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 88 predicate places. [2024-06-21 16:28:58,360 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 195 transitions, 2008 flow [2024-06-21 16:28:58,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:58,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:28:58,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:28:58,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:28:58,361 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:28:58,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:28:58,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1350897743, now seen corresponding path program 2 times [2024-06-21 16:28:58,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:28:58,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372886970] [2024-06-21 16:28:58,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:28:58,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:28:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:28:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:28:59,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:28:59,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372886970] [2024-06-21 16:28:59,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372886970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:28:59,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:28:59,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:28:59,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778763405] [2024-06-21 16:28:59,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:28:59,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:28:59,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:28:59,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:28:59,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:28:59,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:28:59,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 195 transitions, 2008 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:28:59,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:28:59,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:28:59,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:01,011 INFO L124 PetriNetUnfolderBase]: 9432/13685 cut-off events. [2024-06-21 16:29:01,011 INFO L125 PetriNetUnfolderBase]: For 431648/431650 co-relation queries the response was YES. [2024-06-21 16:29:01,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87733 conditions, 13685 events. 9432/13685 cut-off events. For 431648/431650 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 80127 event pairs, 3546 based on Foata normal form. 4/13644 useless extension candidates. Maximal degree in co-relation 87677. Up to 12866 conditions per place. [2024-06-21 16:29:01,140 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 191 selfloop transitions, 35 changer transitions 0/234 dead transitions. [2024-06-21 16:29:01,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 234 transitions, 2822 flow [2024-06-21 16:29:01,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:29:01,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-21 16:29:01,141 INFO L175 Difference]: Start difference. First operand has 143 places, 195 transitions, 2008 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:29:01,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 234 transitions, 2822 flow [2024-06-21 16:29:01,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 234 transitions, 2727 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 16:29:01,704 INFO L231 Difference]: Finished difference. Result has 145 places, 203 transitions, 2160 flow [2024-06-21 16:29:01,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1913, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2160, PETRI_PLACES=145, PETRI_TRANSITIONS=203} [2024-06-21 16:29:01,705 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 90 predicate places. [2024-06-21 16:29:01,705 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 203 transitions, 2160 flow [2024-06-21 16:29:01,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:01,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:01,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:01,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:29:01,706 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:01,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:01,706 INFO L85 PathProgramCache]: Analyzing trace with hash -944971343, now seen corresponding path program 3 times [2024-06-21 16:29:01,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:01,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183143749] [2024-06-21 16:29:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:01,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:02,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:02,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183143749] [2024-06-21 16:29:02,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183143749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:02,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:02,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:02,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106245593] [2024-06-21 16:29:02,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:02,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:02,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:02,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:02,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:02,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:29:02,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 203 transitions, 2160 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:02,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:02,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:29:02,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:04,463 INFO L124 PetriNetUnfolderBase]: 9418/13670 cut-off events. [2024-06-21 16:29:04,463 INFO L125 PetriNetUnfolderBase]: For 462262/462264 co-relation queries the response was YES. [2024-06-21 16:29:04,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90158 conditions, 13670 events. 9418/13670 cut-off events. For 462262/462264 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 80122 event pairs, 3513 based on Foata normal form. 4/13634 useless extension candidates. Maximal degree in co-relation 90101. Up to 12854 conditions per place. [2024-06-21 16:29:04,579 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 185 selfloop transitions, 35 changer transitions 0/228 dead transitions. [2024-06-21 16:29:04,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 228 transitions, 2674 flow [2024-06-21 16:29:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:04,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:29:04,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48626373626373626 [2024-06-21 16:29:04,580 INFO L175 Difference]: Start difference. First operand has 145 places, 203 transitions, 2160 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:29:04,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 228 transitions, 2674 flow [2024-06-21 16:29:05,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 228 transitions, 2534 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-21 16:29:05,038 INFO L231 Difference]: Finished difference. Result has 149 places, 203 transitions, 2099 flow [2024-06-21 16:29:05,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2020, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2099, PETRI_PLACES=149, PETRI_TRANSITIONS=203} [2024-06-21 16:29:05,039 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 94 predicate places. [2024-06-21 16:29:05,039 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 203 transitions, 2099 flow [2024-06-21 16:29:05,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:05,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:05,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:05,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:29:05,039 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:05,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:05,040 INFO L85 PathProgramCache]: Analyzing trace with hash 213230817, now seen corresponding path program 1 times [2024-06-21 16:29:05,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:05,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668871651] [2024-06-21 16:29:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:05,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:06,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:06,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:06,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668871651] [2024-06-21 16:29:06,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668871651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:06,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:06,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:06,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465632331] [2024-06-21 16:29:06,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:06,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:06,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:06,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:29:06,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 203 transitions, 2099 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:06,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:06,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:29:06,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:08,240 INFO L124 PetriNetUnfolderBase]: 8882/13056 cut-off events. [2024-06-21 16:29:08,241 INFO L125 PetriNetUnfolderBase]: For 483807/483824 co-relation queries the response was YES. [2024-06-21 16:29:08,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87493 conditions, 13056 events. 8882/13056 cut-off events. For 483807/483824 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 78392 event pairs, 3472 based on Foata normal form. 19/12973 useless extension candidates. Maximal degree in co-relation 87434. Up to 12151 conditions per place. [2024-06-21 16:29:08,360 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 196 selfloop transitions, 17 changer transitions 0/233 dead transitions. [2024-06-21 16:29:08,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 233 transitions, 2700 flow [2024-06-21 16:29:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:08,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 16:29:08,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835164835164835 [2024-06-21 16:29:08,361 INFO L175 Difference]: Start difference. First operand has 149 places, 203 transitions, 2099 flow. Second operand 7 states and 176 transitions. [2024-06-21 16:29:08,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 233 transitions, 2700 flow [2024-06-21 16:29:08,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 233 transitions, 2588 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 16:29:08,778 INFO L231 Difference]: Finished difference. Result has 151 places, 210 transitions, 2147 flow [2024-06-21 16:29:08,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1994, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2147, PETRI_PLACES=151, PETRI_TRANSITIONS=210} [2024-06-21 16:29:08,778 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 96 predicate places. [2024-06-21 16:29:08,778 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 210 transitions, 2147 flow [2024-06-21 16:29:08,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:08,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:08,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:08,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:29:08,779 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:08,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:08,779 INFO L85 PathProgramCache]: Analyzing trace with hash -576283475, now seen corresponding path program 1 times [2024-06-21 16:29:08,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:08,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347930719] [2024-06-21 16:29:08,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:08,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:09,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:09,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347930719] [2024-06-21 16:29:09,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347930719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:09,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:09,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:29:09,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551363392] [2024-06-21 16:29:09,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:09,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:29:09,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:09,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:29:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:29:09,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 16:29:09,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 210 transitions, 2147 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:09,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:09,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 16:29:09,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:11,085 INFO L124 PetriNetUnfolderBase]: 8467/12624 cut-off events. [2024-06-21 16:29:11,085 INFO L125 PetriNetUnfolderBase]: For 515872/515949 co-relation queries the response was YES. [2024-06-21 16:29:11,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88927 conditions, 12624 events. 8467/12624 cut-off events. For 515872/515949 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 78116 event pairs, 3263 based on Foata normal form. 16/12427 useless extension candidates. Maximal degree in co-relation 88866. Up to 11541 conditions per place. [2024-06-21 16:29:11,201 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 187 selfloop transitions, 10 changer transitions 0/225 dead transitions. [2024-06-21 16:29:11,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 225 transitions, 2645 flow [2024-06-21 16:29:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:29:11,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:29:11,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 16:29:11,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:29:11,202 INFO L175 Difference]: Start difference. First operand has 151 places, 210 transitions, 2147 flow. Second operand 5 states and 130 transitions. [2024-06-21 16:29:11,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 225 transitions, 2645 flow [2024-06-21 16:29:11,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 225 transitions, 2549 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 16:29:11,607 INFO L231 Difference]: Finished difference. Result has 152 places, 214 transitions, 2156 flow [2024-06-21 16:29:11,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2051, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2156, PETRI_PLACES=152, PETRI_TRANSITIONS=214} [2024-06-21 16:29:11,608 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-21 16:29:11,608 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 214 transitions, 2156 flow [2024-06-21 16:29:11,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:11,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:11,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:11,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:29:11,608 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:11,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:11,608 INFO L85 PathProgramCache]: Analyzing trace with hash -96100356, now seen corresponding path program 1 times [2024-06-21 16:29:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:11,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849864307] [2024-06-21 16:29:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:11,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:12,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:12,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849864307] [2024-06-21 16:29:12,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849864307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:12,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:12,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:12,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575624854] [2024-06-21 16:29:12,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:12,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:12,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:12,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:12,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:12,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:29:12,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 214 transitions, 2156 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:12,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:12,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:29:12,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:14,718 INFO L124 PetriNetUnfolderBase]: 10630/15062 cut-off events. [2024-06-21 16:29:14,718 INFO L125 PetriNetUnfolderBase]: For 641280/641295 co-relation queries the response was YES. [2024-06-21 16:29:14,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106855 conditions, 15062 events. 10630/15062 cut-off events. For 641280/641295 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 85633 event pairs, 4061 based on Foata normal form. 16/15074 useless extension candidates. Maximal degree in co-relation 106793. Up to 14325 conditions per place. [2024-06-21 16:29:14,856 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 215 selfloop transitions, 51 changer transitions 0/273 dead transitions. [2024-06-21 16:29:14,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 273 transitions, 3342 flow [2024-06-21 16:29:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:29:14,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510989010989011 [2024-06-21 16:29:14,857 INFO L175 Difference]: Start difference. First operand has 152 places, 214 transitions, 2156 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:29:14,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 273 transitions, 3342 flow [2024-06-21 16:29:15,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 273 transitions, 3265 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 16:29:15,424 INFO L231 Difference]: Finished difference. Result has 157 places, 232 transitions, 2501 flow [2024-06-21 16:29:15,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2079, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2501, PETRI_PLACES=157, PETRI_TRANSITIONS=232} [2024-06-21 16:29:15,424 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 102 predicate places. [2024-06-21 16:29:15,424 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 232 transitions, 2501 flow [2024-06-21 16:29:15,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:15,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:15,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:15,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:29:15,425 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:15,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:15,425 INFO L85 PathProgramCache]: Analyzing trace with hash 825361472, now seen corresponding path program 2 times [2024-06-21 16:29:15,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:15,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974537444] [2024-06-21 16:29:15,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:15,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:16,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:16,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974537444] [2024-06-21 16:29:16,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974537444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:16,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:16,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:16,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826888645] [2024-06-21 16:29:16,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:16,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:16,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:16,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:29:16,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 232 transitions, 2501 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:16,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:16,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:29:16,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:18,665 INFO L124 PetriNetUnfolderBase]: 10708/15167 cut-off events. [2024-06-21 16:29:18,665 INFO L125 PetriNetUnfolderBase]: For 685749/685764 co-relation queries the response was YES. [2024-06-21 16:29:18,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111209 conditions, 15167 events. 10708/15167 cut-off events. For 685749/685764 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86171 event pairs, 4042 based on Foata normal form. 16/15179 useless extension candidates. Maximal degree in co-relation 111145. Up to 14395 conditions per place. [2024-06-21 16:29:18,806 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 212 selfloop transitions, 59 changer transitions 0/278 dead transitions. [2024-06-21 16:29:18,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 278 transitions, 3601 flow [2024-06-21 16:29:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:29:18,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-21 16:29:18,807 INFO L175 Difference]: Start difference. First operand has 157 places, 232 transitions, 2501 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:29:18,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 278 transitions, 3601 flow [2024-06-21 16:29:19,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 278 transitions, 3460 flow, removed 60 selfloop flow, removed 2 redundant places. [2024-06-21 16:29:19,271 INFO L231 Difference]: Finished difference. Result has 162 places, 240 transitions, 2659 flow [2024-06-21 16:29:19,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=162, PETRI_TRANSITIONS=240} [2024-06-21 16:29:19,271 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-21 16:29:19,271 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 240 transitions, 2659 flow [2024-06-21 16:29:19,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:19,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:19,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:19,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:29:19,272 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:19,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:19,272 INFO L85 PathProgramCache]: Analyzing trace with hash -540443170, now seen corresponding path program 3 times [2024-06-21 16:29:19,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:19,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035955395] [2024-06-21 16:29:19,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:19,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:20,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:20,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035955395] [2024-06-21 16:29:20,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035955395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:20,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:20,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:20,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163745167] [2024-06-21 16:29:20,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:20,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:20,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:20,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:20,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:20,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:29:20,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 240 transitions, 2659 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:20,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:20,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:29:20,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:22,440 INFO L124 PetriNetUnfolderBase]: 10694/15145 cut-off events. [2024-06-21 16:29:22,440 INFO L125 PetriNetUnfolderBase]: For 713593/713612 co-relation queries the response was YES. [2024-06-21 16:29:22,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111953 conditions, 15145 events. 10694/15145 cut-off events. For 713593/713612 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 85994 event pairs, 4031 based on Foata normal form. 18/15158 useless extension candidates. Maximal degree in co-relation 111887. Up to 14383 conditions per place. [2024-06-21 16:29:22,594 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 213 selfloop transitions, 61 changer transitions 0/281 dead transitions. [2024-06-21 16:29:22,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 281 transitions, 3635 flow [2024-06-21 16:29:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:22,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 16:29:22,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5027472527472527 [2024-06-21 16:29:22,595 INFO L175 Difference]: Start difference. First operand has 162 places, 240 transitions, 2659 flow. Second operand 7 states and 183 transitions. [2024-06-21 16:29:22,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 281 transitions, 3635 flow [2024-06-21 16:29:23,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 281 transitions, 3447 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-21 16:29:23,328 INFO L231 Difference]: Finished difference. Result has 166 places, 242 transitions, 2632 flow [2024-06-21 16:29:23,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2632, PETRI_PLACES=166, PETRI_TRANSITIONS=242} [2024-06-21 16:29:23,329 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 111 predicate places. [2024-06-21 16:29:23,329 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 242 transitions, 2632 flow [2024-06-21 16:29:23,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:23,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:23,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:23,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:29:23,329 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:23,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 2108245342, now seen corresponding path program 4 times [2024-06-21 16:29:23,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:23,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787461972] [2024-06-21 16:29:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:23,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:24,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:24,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787461972] [2024-06-21 16:29:24,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787461972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:24,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:24,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:24,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872585519] [2024-06-21 16:29:24,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:24,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:24,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:24,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:24,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:29:24,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 242 transitions, 2632 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:24,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:24,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:29:24,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:26,692 INFO L124 PetriNetUnfolderBase]: 10726/15187 cut-off events. [2024-06-21 16:29:26,692 INFO L125 PetriNetUnfolderBase]: For 744555/744574 co-relation queries the response was YES. [2024-06-21 16:29:26,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113006 conditions, 15187 events. 10726/15187 cut-off events. For 744555/744574 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86204 event pairs, 4038 based on Foata normal form. 18/15200 useless extension candidates. Maximal degree in co-relation 112939. Up to 14412 conditions per place. [2024-06-21 16:29:26,862 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 208 selfloop transitions, 65 changer transitions 0/280 dead transitions. [2024-06-21 16:29:26,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 280 transitions, 3522 flow [2024-06-21 16:29:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 16:29:26,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.489010989010989 [2024-06-21 16:29:26,864 INFO L175 Difference]: Start difference. First operand has 166 places, 242 transitions, 2632 flow. Second operand 7 states and 178 transitions. [2024-06-21 16:29:26,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 280 transitions, 3522 flow [2024-06-21 16:29:27,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 280 transitions, 3408 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 16:29:27,654 INFO L231 Difference]: Finished difference. Result has 170 places, 246 transitions, 2747 flow [2024-06-21 16:29:27,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2747, PETRI_PLACES=170, PETRI_TRANSITIONS=246} [2024-06-21 16:29:27,655 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 115 predicate places. [2024-06-21 16:29:27,655 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 246 transitions, 2747 flow [2024-06-21 16:29:27,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:27,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:27,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:27,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:29:27,655 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:27,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1444851802, now seen corresponding path program 5 times [2024-06-21 16:29:27,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:27,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780623934] [2024-06-21 16:29:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:28,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:28,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780623934] [2024-06-21 16:29:28,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780623934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:28,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:28,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:28,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608177493] [2024-06-21 16:29:28,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:28,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:28,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:28,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:29:28,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 246 transitions, 2747 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:28,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:28,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:29:28,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:31,273 INFO L124 PetriNetUnfolderBase]: 10712/15174 cut-off events. [2024-06-21 16:29:31,273 INFO L125 PetriNetUnfolderBase]: For 775801/775841 co-relation queries the response was YES. [2024-06-21 16:29:31,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113657 conditions, 15174 events. 10712/15174 cut-off events. For 775801/775841 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86199 event pairs, 4033 based on Foata normal form. 32/15199 useless extension candidates. Maximal degree in co-relation 113588. Up to 14400 conditions per place. [2024-06-21 16:29:31,414 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 204 selfloop transitions, 65 changer transitions 0/276 dead transitions. [2024-06-21 16:29:31,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 276 transitions, 3529 flow [2024-06-21 16:29:31,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 16:29:31,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47802197802197804 [2024-06-21 16:29:31,415 INFO L175 Difference]: Start difference. First operand has 170 places, 246 transitions, 2747 flow. Second operand 7 states and 174 transitions. [2024-06-21 16:29:31,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 276 transitions, 3529 flow [2024-06-21 16:29:32,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 276 transitions, 3345 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-21 16:29:32,056 INFO L231 Difference]: Finished difference. Result has 173 places, 246 transitions, 2702 flow [2024-06-21 16:29:32,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2563, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2702, PETRI_PLACES=173, PETRI_TRANSITIONS=246} [2024-06-21 16:29:32,056 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-06-21 16:29:32,056 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 246 transitions, 2702 flow [2024-06-21 16:29:32,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:32,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:32,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:32,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:29:32,057 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:32,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:32,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1987420164, now seen corresponding path program 6 times [2024-06-21 16:29:32,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:32,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860397591] [2024-06-21 16:29:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:32,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:32,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:32,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860397591] [2024-06-21 16:29:32,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860397591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:32,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:32,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:29:32,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879330478] [2024-06-21 16:29:32,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:32,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:29:32,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:32,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:29:32,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:29:33,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:29:33,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 246 transitions, 2702 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:33,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:33,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:29:33,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:35,144 INFO L124 PetriNetUnfolderBase]: 10698/15156 cut-off events. [2024-06-21 16:29:35,145 INFO L125 PetriNetUnfolderBase]: For 804673/804713 co-relation queries the response was YES. [2024-06-21 16:29:35,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114155 conditions, 15156 events. 10698/15156 cut-off events. For 804673/804713 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 86043 event pairs, 4033 based on Foata normal form. 32/15181 useless extension candidates. Maximal degree in co-relation 114085. Up to 14388 conditions per place. [2024-06-21 16:29:35,322 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 202 selfloop transitions, 65 changer transitions 0/274 dead transitions. [2024-06-21 16:29:35,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 274 transitions, 3334 flow [2024-06-21 16:29:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:29:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:29:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 16:29:35,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-21 16:29:35,323 INFO L175 Difference]: Start difference. First operand has 173 places, 246 transitions, 2702 flow. Second operand 7 states and 172 transitions. [2024-06-21 16:29:35,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 274 transitions, 3334 flow [2024-06-21 16:29:36,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 274 transitions, 3102 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 16:29:36,147 INFO L231 Difference]: Finished difference. Result has 174 places, 246 transitions, 2609 flow [2024-06-21 16:29:36,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2609, PETRI_PLACES=174, PETRI_TRANSITIONS=246} [2024-06-21 16:29:36,149 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 119 predicate places. [2024-06-21 16:29:36,149 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 246 transitions, 2609 flow [2024-06-21 16:29:36,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:36,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:36,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:36,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:29:36,150 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:36,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:36,150 INFO L85 PathProgramCache]: Analyzing trace with hash -709046789, now seen corresponding path program 1 times [2024-06-21 16:29:36,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:36,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110394560] [2024-06-21 16:29:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:36,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:36,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:37,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:37,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110394560] [2024-06-21 16:29:37,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110394560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:37,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:37,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:29:37,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330932834] [2024-06-21 16:29:37,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:37,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:29:37,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:37,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:29:37,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:29:37,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 16:29:37,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 246 transitions, 2609 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:37,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:37,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 16:29:37,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:39,276 INFO L124 PetriNetUnfolderBase]: 8555/12784 cut-off events. [2024-06-21 16:29:39,277 INFO L125 PetriNetUnfolderBase]: For 695239/695408 co-relation queries the response was YES. [2024-06-21 16:29:39,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97331 conditions, 12784 events. 8555/12784 cut-off events. For 695239/695408 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 79200 event pairs, 3226 based on Foata normal form. 17/12587 useless extension candidates. Maximal degree in co-relation 97260. Up to 11548 conditions per place. [2024-06-21 16:29:39,430 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 207 selfloop transitions, 14 changer transitions 0/263 dead transitions. [2024-06-21 16:29:39,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 263 transitions, 3165 flow [2024-06-21 16:29:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:29:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:29:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 16:29:39,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48717948717948717 [2024-06-21 16:29:39,431 INFO L175 Difference]: Start difference. First operand has 174 places, 246 transitions, 2609 flow. Second operand 6 states and 152 transitions. [2024-06-21 16:29:39,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 263 transitions, 3165 flow [2024-06-21 16:29:40,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 263 transitions, 3039 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 16:29:40,152 INFO L231 Difference]: Finished difference. Result has 175 places, 250 transitions, 2602 flow [2024-06-21 16:29:40,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2602, PETRI_PLACES=175, PETRI_TRANSITIONS=250} [2024-06-21 16:29:40,153 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 120 predicate places. [2024-06-21 16:29:40,153 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 250 transitions, 2602 flow [2024-06-21 16:29:40,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:40,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:40,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:40,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:29:40,153 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:40,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:40,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1902443274, now seen corresponding path program 1 times [2024-06-21 16:29:40,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:40,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831812245] [2024-06-21 16:29:40,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:40,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:41,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:41,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831812245] [2024-06-21 16:29:41,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831812245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:41,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:41,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:41,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952977494] [2024-06-21 16:29:41,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:41,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:41,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:41,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:41,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:29:41,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 250 transitions, 2602 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:41,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:41,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:29:41,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:43,346 INFO L124 PetriNetUnfolderBase]: 10764/15228 cut-off events. [2024-06-21 16:29:43,346 INFO L125 PetriNetUnfolderBase]: For 858834/858844 co-relation queries the response was YES. [2024-06-21 16:29:43,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117796 conditions, 15228 events. 10764/15228 cut-off events. For 858834/858844 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 86442 event pairs, 3999 based on Foata normal form. 12/15237 useless extension candidates. Maximal degree in co-relation 117724. Up to 14490 conditions per place. [2024-06-21 16:29:43,522 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 242 selfloop transitions, 58 changer transitions 0/307 dead transitions. [2024-06-21 16:29:43,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 307 transitions, 3686 flow [2024-06-21 16:29:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:29:43,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:29:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 16:29:43,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5072115384615384 [2024-06-21 16:29:43,523 INFO L175 Difference]: Start difference. First operand has 175 places, 250 transitions, 2602 flow. Second operand 8 states and 211 transitions. [2024-06-21 16:29:43,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 307 transitions, 3686 flow [2024-06-21 16:29:44,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 307 transitions, 3595 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 16:29:44,450 INFO L231 Difference]: Finished difference. Result has 180 places, 259 transitions, 2835 flow [2024-06-21 16:29:44,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2835, PETRI_PLACES=180, PETRI_TRANSITIONS=259} [2024-06-21 16:29:44,451 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 125 predicate places. [2024-06-21 16:29:44,451 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 259 transitions, 2835 flow [2024-06-21 16:29:44,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:44,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:44,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:44,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:29:44,452 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:44,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1205981484, now seen corresponding path program 2 times [2024-06-21 16:29:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:44,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448705804] [2024-06-21 16:29:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:44,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:45,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:45,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448705804] [2024-06-21 16:29:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448705804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:45,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:45,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:45,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562069784] [2024-06-21 16:29:45,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:45,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:45,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:45,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:29:45,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 259 transitions, 2835 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:45,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:45,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:29:45,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:47,933 INFO L124 PetriNetUnfolderBase]: 10828/15322 cut-off events. [2024-06-21 16:29:47,933 INFO L125 PetriNetUnfolderBase]: For 907387/907397 co-relation queries the response was YES. [2024-06-21 16:29:48,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121700 conditions, 15322 events. 10828/15322 cut-off events. For 907387/907397 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 87070 event pairs, 3999 based on Foata normal form. 12/15331 useless extension candidates. Maximal degree in co-relation 121626. Up to 14538 conditions per place. [2024-06-21 16:29:48,114 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 249 selfloop transitions, 69 changer transitions 0/325 dead transitions. [2024-06-21 16:29:48,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 325 transitions, 3948 flow [2024-06-21 16:29:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:29:48,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:29:48,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-21 16:29:48,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-21 16:29:48,115 INFO L175 Difference]: Start difference. First operand has 180 places, 259 transitions, 2835 flow. Second operand 10 states and 255 transitions. [2024-06-21 16:29:48,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 325 transitions, 3948 flow [2024-06-21 16:29:49,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 325 transitions, 3697 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-21 16:29:49,692 INFO L231 Difference]: Finished difference. Result has 185 places, 267 transitions, 2860 flow [2024-06-21 16:29:49,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2616, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2860, PETRI_PLACES=185, PETRI_TRANSITIONS=267} [2024-06-21 16:29:49,693 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 130 predicate places. [2024-06-21 16:29:49,693 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 267 transitions, 2860 flow [2024-06-21 16:29:49,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:49,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:49,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:49,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:29:49,694 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:49,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:49,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1197407628, now seen corresponding path program 1 times [2024-06-21 16:29:49,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:49,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63156318] [2024-06-21 16:29:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:49,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:50,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:50,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63156318] [2024-06-21 16:29:50,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63156318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:50,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:50,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:50,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848932135] [2024-06-21 16:29:50,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:50,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:50,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:50,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:50,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:29:50,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 267 transitions, 2860 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:50,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:50,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:29:50,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:53,193 INFO L124 PetriNetUnfolderBase]: 11029/15593 cut-off events. [2024-06-21 16:29:53,193 INFO L125 PetriNetUnfolderBase]: For 973331/973341 co-relation queries the response was YES. [2024-06-21 16:29:53,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125136 conditions, 15593 events. 11029/15593 cut-off events. For 973331/973341 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 88423 event pairs, 3406 based on Foata normal form. 24/15614 useless extension candidates. Maximal degree in co-relation 125062. Up to 14596 conditions per place. [2024-06-21 16:29:53,368 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 265 selfloop transitions, 54 changer transitions 0/326 dead transitions. [2024-06-21 16:29:53,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 326 transitions, 4010 flow [2024-06-21 16:29:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:29:53,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:29:53,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 16:29:53,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5144230769230769 [2024-06-21 16:29:53,369 INFO L175 Difference]: Start difference. First operand has 185 places, 267 transitions, 2860 flow. Second operand 8 states and 214 transitions. [2024-06-21 16:29:53,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 326 transitions, 4010 flow [2024-06-21 16:29:54,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 326 transitions, 3830 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 16:29:54,381 INFO L231 Difference]: Finished difference. Result has 186 places, 271 transitions, 2939 flow [2024-06-21 16:29:54,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2680, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2939, PETRI_PLACES=186, PETRI_TRANSITIONS=271} [2024-06-21 16:29:54,381 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 131 predicate places. [2024-06-21 16:29:54,382 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 271 transitions, 2939 flow [2024-06-21 16:29:54,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:54,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:54,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:54,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:29:54,382 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:54,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:54,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1028955602, now seen corresponding path program 2 times [2024-06-21 16:29:54,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:54,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579975409] [2024-06-21 16:29:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:54,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:29:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:29:55,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:29:55,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579975409] [2024-06-21 16:29:55,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579975409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:29:55,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:29:55,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:29:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745307408] [2024-06-21 16:29:55,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:29:55,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:29:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:29:55,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:29:55,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:29:55,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:29:55,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 271 transitions, 2939 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:55,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:29:55,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:29:55,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:29:58,096 INFO L124 PetriNetUnfolderBase]: 11154/15788 cut-off events. [2024-06-21 16:29:58,096 INFO L125 PetriNetUnfolderBase]: For 1027575/1027585 co-relation queries the response was YES. [2024-06-21 16:29:58,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128286 conditions, 15788 events. 11154/15788 cut-off events. For 1027575/1027585 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 89907 event pairs, 4042 based on Foata normal form. 28/15813 useless extension candidates. Maximal degree in co-relation 128211. Up to 14999 conditions per place. [2024-06-21 16:29:58,265 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 261 selfloop transitions, 52 changer transitions 0/320 dead transitions. [2024-06-21 16:29:58,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 320 transitions, 3817 flow [2024-06-21 16:29:58,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:29:58,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:29:58,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 16:29:58,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49759615384615385 [2024-06-21 16:29:58,267 INFO L175 Difference]: Start difference. First operand has 186 places, 271 transitions, 2939 flow. Second operand 8 states and 207 transitions. [2024-06-21 16:29:58,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 320 transitions, 3817 flow [2024-06-21 16:29:59,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 320 transitions, 3702 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 16:29:59,417 INFO L231 Difference]: Finished difference. Result has 190 places, 273 transitions, 3014 flow [2024-06-21 16:29:59,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3014, PETRI_PLACES=190, PETRI_TRANSITIONS=273} [2024-06-21 16:29:59,417 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 135 predicate places. [2024-06-21 16:29:59,417 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 273 transitions, 3014 flow [2024-06-21 16:29:59,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:29:59,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:29:59,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:29:59,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:29:59,418 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:29:59,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:29:59,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1721553992, now seen corresponding path program 1 times [2024-06-21 16:29:59,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:29:59,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656633926] [2024-06-21 16:29:59,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:29:59,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:29:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:00,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:00,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656633926] [2024-06-21 16:30:00,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656633926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:00,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:00,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:30:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544578525] [2024-06-21 16:30:00,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:00,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:30:00,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:00,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:30:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:30:00,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:30:00,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 273 transitions, 3014 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:00,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:00,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:30:00,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:03,614 INFO L124 PetriNetUnfolderBase]: 11186/15849 cut-off events. [2024-06-21 16:30:03,615 INFO L125 PetriNetUnfolderBase]: For 1053156/1053164 co-relation queries the response was YES. [2024-06-21 16:30:03,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129395 conditions, 15849 events. 11186/15849 cut-off events. For 1053156/1053164 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 90482 event pairs, 4115 based on Foata normal form. 12/15856 useless extension candidates. Maximal degree in co-relation 129318. Up to 15214 conditions per place. [2024-06-21 16:30:03,769 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 268 selfloop transitions, 43 changer transitions 0/318 dead transitions. [2024-06-21 16:30:03,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 318 transitions, 3870 flow [2024-06-21 16:30:03,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:30:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:30:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 16:30:03,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-21 16:30:03,773 INFO L175 Difference]: Start difference. First operand has 190 places, 273 transitions, 3014 flow. Second operand 8 states and 202 transitions. [2024-06-21 16:30:03,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 318 transitions, 3870 flow [2024-06-21 16:30:05,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 318 transitions, 3736 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 16:30:05,054 INFO L231 Difference]: Finished difference. Result has 192 places, 277 transitions, 3079 flow [2024-06-21 16:30:05,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2880, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3079, PETRI_PLACES=192, PETRI_TRANSITIONS=277} [2024-06-21 16:30:05,054 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 137 predicate places. [2024-06-21 16:30:05,054 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 277 transitions, 3079 flow [2024-06-21 16:30:05,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:05,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:05,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:05,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:30:05,055 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:30:05,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1315558734, now seen corresponding path program 3 times [2024-06-21 16:30:05,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:05,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901675531] [2024-06-21 16:30:05,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:05,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:05,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:05,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901675531] [2024-06-21 16:30:05,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901675531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:05,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:05,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:30:05,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774231795] [2024-06-21 16:30:05,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:05,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:30:05,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:30:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:30:06,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:30:06,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 277 transitions, 3079 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:06,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:06,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:30:06,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:08,855 INFO L124 PetriNetUnfolderBase]: 11264/15964 cut-off events. [2024-06-21 16:30:08,855 INFO L125 PetriNetUnfolderBase]: For 1104400/1104409 co-relation queries the response was YES. [2024-06-21 16:30:08,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132857 conditions, 15964 events. 11264/15964 cut-off events. For 1104400/1104409 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 91222 event pairs, 4011 based on Foata normal form. 8/15968 useless extension candidates. Maximal degree in co-relation 132779. Up to 14767 conditions per place. [2024-06-21 16:30:09,040 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 217 selfloop transitions, 113 changer transitions 0/337 dead transitions. [2024-06-21 16:30:09,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 337 transitions, 4691 flow [2024-06-21 16:30:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:30:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:30:09,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-21 16:30:09,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 16:30:09,041 INFO L175 Difference]: Start difference. First operand has 192 places, 277 transitions, 3079 flow. Second operand 8 states and 216 transitions. [2024-06-21 16:30:09,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 337 transitions, 4691 flow [2024-06-21 16:30:10,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 337 transitions, 4522 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-21 16:30:10,023 INFO L231 Difference]: Finished difference. Result has 194 places, 289 transitions, 3441 flow [2024-06-21 16:30:10,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2910, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3441, PETRI_PLACES=194, PETRI_TRANSITIONS=289} [2024-06-21 16:30:10,024 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 139 predicate places. [2024-06-21 16:30:10,024 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 289 transitions, 3441 flow [2024-06-21 16:30:10,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:10,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:10,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:10,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:30:10,025 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:30:10,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1786853388, now seen corresponding path program 2 times [2024-06-21 16:30:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:10,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361322121] [2024-06-21 16:30:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:10,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:10,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:11,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:11,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361322121] [2024-06-21 16:30:11,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361322121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:11,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:11,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:30:11,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565999502] [2024-06-21 16:30:11,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:11,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:30:11,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:11,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:30:11,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:30:11,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:30:11,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 289 transitions, 3441 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:11,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:11,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:30:11,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:30:14,072 INFO L124 PetriNetUnfolderBase]: 11342/16092 cut-off events. [2024-06-21 16:30:14,073 INFO L125 PetriNetUnfolderBase]: For 1169810/1169820 co-relation queries the response was YES. [2024-06-21 16:30:14,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137402 conditions, 16092 events. 11342/16092 cut-off events. For 1169810/1169820 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 92218 event pairs, 4053 based on Foata normal form. 12/16098 useless extension candidates. Maximal degree in co-relation 137323. Up to 14970 conditions per place. [2024-06-21 16:30:14,263 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 244 selfloop transitions, 96 changer transitions 0/347 dead transitions. [2024-06-21 16:30:14,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 347 transitions, 4949 flow [2024-06-21 16:30:14,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:30:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:30:14,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 16:30:14,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-21 16:30:14,264 INFO L175 Difference]: Start difference. First operand has 194 places, 289 transitions, 3441 flow. Second operand 8 states and 212 transitions. [2024-06-21 16:30:14,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 347 transitions, 4949 flow [2024-06-21 16:30:15,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 347 transitions, 4723 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-21 16:30:15,750 INFO L231 Difference]: Finished difference. Result has 198 places, 301 transitions, 3748 flow [2024-06-21 16:30:15,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3748, PETRI_PLACES=198, PETRI_TRANSITIONS=301} [2024-06-21 16:30:15,750 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 143 predicate places. [2024-06-21 16:30:15,751 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 301 transitions, 3748 flow [2024-06-21 16:30:15,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:15,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:30:15,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:30:15,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:30:15,751 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:30:15,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:30:15,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1786853574, now seen corresponding path program 4 times [2024-06-21 16:30:15,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:30:15,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744269834] [2024-06-21 16:30:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:30:15,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:30:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:30:16,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:30:16,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:30:16,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744269834] [2024-06-21 16:30:16,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744269834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:30:16,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:30:16,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:30:16,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356704041] [2024-06-21 16:30:16,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:30:16,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:30:16,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:30:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:30:16,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:30:16,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:30:16,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 301 transitions, 3748 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:30:16,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:30:16,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:30:16,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand