./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix039.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/mix039.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/mix039.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix039.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-7724a2d-m [2024-06-27 20:27:58,536 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:27:58,598 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:27:58,603 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:27:58,603 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:27:58,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:27:58,626 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:27:58,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:27:58,627 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:27:58,629 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:27:58,630 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:27:58,630 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:27:58,631 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:27:58,631 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:27:58,632 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:27:58,632 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:27:58,632 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:27:58,632 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:27:58,632 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:27:58,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:27:58,633 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:27:58,634 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:27:58,634 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:27:58,634 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:27:58,634 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:27:58,634 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:27:58,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:27:58,634 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:27:58,635 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:27:58,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:27:58,636 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:27:58,636 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:27:58,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:27:58,636 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:27:58,636 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:27:58,636 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:27:58,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:27:58,637 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:27:58,637 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:27:58,637 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:27:58,637 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:27:58,637 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:27:58,637 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:27:58,638 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:27:58,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:27:58,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:27:58,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:27:58,903 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:27:58,903 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:27:58,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix039.opt.i [2024-06-27 20:27:59,855 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:28:00,117 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:28:00,117 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix039.opt.i [2024-06-27 20:28:00,129 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4650653f6/15fde53103b84a9c93aff25a0bb610db/FLAGe9d6998a4 [2024-06-27 20:28:00,139 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4650653f6/15fde53103b84a9c93aff25a0bb610db [2024-06-27 20:28:00,140 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:28:00,141 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:28:00,142 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix039.opt.yml/witness.yml [2024-06-27 20:28:00,308 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:28:00,309 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:28:00,310 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:28:00,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:28:00,314 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:28:00,314 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:28:00" (1/2) ... [2024-06-27 20:28:00,315 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474268fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:28:00, skipping insertion in model container [2024-06-27 20:28:00,315 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:28:00" (1/2) ... [2024-06-27 20:28:00,316 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@dce5d36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:28:00, skipping insertion in model container [2024-06-27 20:28:00,317 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:28:00" (2/2) ... [2024-06-27 20:28:00,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474268fb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00, skipping insertion in model container [2024-06-27 20:28:00,317 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:28:00" (2/2) ... [2024-06-27 20:28:00,318 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:28:00,412 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:28:00,414 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-27 20:28:00,414 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-27 20:28:00,414 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-27 20:28:00,414 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] (((((((((((((((((((((((! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0) [2024-06-27 20:28:00,414 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:28:00,415 INFO L106 edCorrectnessWitness]: ghost_update [L857-L857] multithreaded = 1; [2024-06-27 20:28:00,452 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:28:00,762 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:28:00,772 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:28:00,873 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:28:00,908 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:28:00,908 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00 WrapperNode [2024-06-27 20:28:00,908 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:28:00,909 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:28:00,909 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:28:00,909 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:28:00,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,952 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 146 [2024-06-27 20:28:00,952 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:28:00,953 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:28:00,953 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:28:00,953 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:28:00,961 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,961 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,964 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,975 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]. [2024-06-27 20:28:00,976 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,976 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,984 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,985 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,987 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,988 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:00,990 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:28:00,991 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:28:00,991 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:28:00,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:28:00,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (1/1) ... [2024-06-27 20:28:01,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:28:01,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:28:01,026 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) [2024-06-27 20:28:01,027 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 [2024-06-27 20:28:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:28:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:28:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:28:01,050 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:28:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:28:01,050 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:28:01,051 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:28:01,051 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:28:01,051 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-27 20:28:01,052 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-27 20:28:01,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:28:01,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:28:01,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:28:01,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:28:01,053 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:28:01,208 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:28:01,210 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:28:01,467 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:28:01,467 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:28:01,567 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:28:01,567 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:28:01,568 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:28:01 BoogieIcfgContainer [2024-06-27 20:28:01,568 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:28:01,569 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:28:01,569 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:28:01,572 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:28:01,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:28:00" (1/4) ... [2024-06-27 20:28:01,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4c63f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:28:01, skipping insertion in model container [2024-06-27 20:28:01,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:28:00" (2/4) ... [2024-06-27 20:28:01,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4c63f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:28:01, skipping insertion in model container [2024-06-27 20:28:01,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:28:00" (3/4) ... [2024-06-27 20:28:01,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4c63f8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:28:01, skipping insertion in model container [2024-06-27 20:28:01,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:28:01" (4/4) ... [2024-06-27 20:28:01,574 INFO L112 eAbstractionObserver]: Analyzing ICFG mix039.opt.i [2024-06-27 20:28:01,587 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:28:01,588 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-27 20:28:01,588 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:28:01,632 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:28:01,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:28:01,721 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-27 20:28:01,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:28:01,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 90 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:28:01,724 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-27 20:28:01,727 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-27 20:28:01,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:28:01,745 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;@792a7c04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:28:01,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-27 20:28:01,748 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:28:01,749 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:28:01,749 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:28:01,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:01,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:28:01,750 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)] === [2024-06-27 20:28:01,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:01,754 INFO L85 PathProgramCache]: Analyzing trace with hash 384691786, now seen corresponding path program 1 times [2024-06-27 20:28:01,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:01,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117717973] [2024-06-27 20:28:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:01,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:02,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:02,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117717973] [2024-06-27 20:28:02,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117717973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:02,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:02,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:28:02,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788944907] [2024-06-27 20:28:02,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:02,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:28:02,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:02,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:28:02,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:28:02,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-06-27 20:28:02,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 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) [2024-06-27 20:28:02,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:02,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-06-27 20:28:02,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:03,685 INFO L124 PetriNetUnfolderBase]: 6197/8949 cut-off events. [2024-06-27 20:28:03,685 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-27 20:28:03,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17695 conditions, 8949 events. 6197/8949 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 51807 event pairs, 4558 based on Foata normal form. 1/8642 useless extension candidates. Maximal degree in co-relation 17682. Up to 8479 conditions per place. [2024-06-27 20:28:03,743 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 41 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-27 20:28:03,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 227 flow [2024-06-27 20:28:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:28:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:28:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-27 20:28:03,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6540880503144654 [2024-06-27 20:28:03,755 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 104 transitions. [2024-06-27 20:28:03,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 227 flow [2024-06-27 20:28:03,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 20:28:03,762 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-27 20:28:03,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-27 20:28:03,766 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-27 20:28:03,766 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-27 20:28:03,767 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) [2024-06-27 20:28:03,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:03,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:03,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:28:03,767 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)] === [2024-06-27 20:28:03,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:03,768 INFO L85 PathProgramCache]: Analyzing trace with hash 323025033, now seen corresponding path program 1 times [2024-06-27 20:28:03,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:03,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453262444] [2024-06-27 20:28:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:03,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:04,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:04,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453262444] [2024-06-27 20:28:04,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453262444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:04,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:04,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:28:04,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975027546] [2024-06-27 20:28:04,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:04,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:28:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:04,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:28:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:28:04,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-27 20:28:04,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 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) [2024-06-27 20:28:04,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:04,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-27 20:28:04,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:05,382 INFO L124 PetriNetUnfolderBase]: 7092/9982 cut-off events. [2024-06-27 20:28:05,382 INFO L125 PetriNetUnfolderBase]: For 1997/1997 co-relation queries the response was YES. [2024-06-27 20:28:05,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22709 conditions, 9982 events. 7092/9982 cut-off events. For 1997/1997 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 56301 event pairs, 4490 based on Foata normal form. 4/9825 useless extension candidates. Maximal degree in co-relation 22697. Up to 9649 conditions per place. [2024-06-27 20:28:05,434 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 52 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-27 20:28:05,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 321 flow [2024-06-27 20:28:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:28:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:28:05,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-06-27 20:28:05,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273584905660378 [2024-06-27 20:28:05,439 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 133 transitions. [2024-06-27 20:28:05,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 321 flow [2024-06-27 20:28:05,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:28:05,441 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-27 20:28:05,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-27 20:28:05,442 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-27 20:28:05,443 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-27 20:28:05,444 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) [2024-06-27 20:28:05,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:05,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:05,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:28:05,445 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)] === [2024-06-27 20:28:05,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:05,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1782198516, now seen corresponding path program 1 times [2024-06-27 20:28:05,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:05,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064477414] [2024-06-27 20:28:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:05,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:06,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:06,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064477414] [2024-06-27 20:28:06,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064477414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:06,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:06,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:28:06,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665699549] [2024-06-27 20:28:06,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:06,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:28:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:28:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:28:06,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-27 20:28:06,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 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) [2024-06-27 20:28:06,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:06,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-27 20:28:06,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:07,508 INFO L124 PetriNetUnfolderBase]: 9006/12594 cut-off events. [2024-06-27 20:28:07,508 INFO L125 PetriNetUnfolderBase]: For 6795/6795 co-relation queries the response was YES. [2024-06-27 20:28:07,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31737 conditions, 12594 events. 9006/12594 cut-off events. For 6795/6795 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 69754 event pairs, 4478 based on Foata normal form. 8/12399 useless extension candidates. Maximal degree in co-relation 31723. Up to 12137 conditions per place. [2024-06-27 20:28:07,581 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-27 20:28:07,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 486 flow [2024-06-27 20:28:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:28:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:28:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-27 20:28:07,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-06-27 20:28:07,585 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 186 transitions. [2024-06-27 20:28:07,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 486 flow [2024-06-27 20:28:07,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 458 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 20:28:07,590 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-27 20:28:07,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-27 20:28:07,591 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-27 20:28:07,592 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-27 20:28:07,592 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) [2024-06-27 20:28:07,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:07,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:07,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:28:07,593 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)] === [2024-06-27 20:28:07,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash -288351049, now seen corresponding path program 1 times [2024-06-27 20:28:07,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:07,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236672802] [2024-06-27 20:28:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:07,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:07,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:08,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:08,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:08,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236672802] [2024-06-27 20:28:08,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236672802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:08,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:08,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:28:08,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17429490] [2024-06-27 20:28:08,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:08,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:28:08,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:28:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:28:08,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:28:08,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 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) [2024-06-27 20:28:08,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:08,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:28:08,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:09,467 INFO L124 PetriNetUnfolderBase]: 7847/11280 cut-off events. [2024-06-27 20:28:09,467 INFO L125 PetriNetUnfolderBase]: For 11293/11293 co-relation queries the response was YES. [2024-06-27 20:28:09,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31080 conditions, 11280 events. 7847/11280 cut-off events. For 11293/11293 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 64605 event pairs, 4266 based on Foata normal form. 3/11080 useless extension candidates. Maximal degree in co-relation 31063. Up to 10669 conditions per place. [2024-06-27 20:28:09,519 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-27 20:28:09,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 447 flow [2024-06-27 20:28:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:28:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:28:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-27 20:28:09,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-27 20:28:09,521 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 136 transitions. [2024-06-27 20:28:09,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 447 flow [2024-06-27 20:28:09,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:28:09,525 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-27 20:28:09,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-27 20:28:09,526 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-27 20:28:09,526 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-27 20:28:09,527 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) [2024-06-27 20:28:09,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:09,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:09,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:28:09,527 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)] === [2024-06-27 20:28:09,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:09,528 INFO L85 PathProgramCache]: Analyzing trace with hash -361458903, now seen corresponding path program 1 times [2024-06-27 20:28:09,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:09,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204937793] [2024-06-27 20:28:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:09,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:10,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:10,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204937793] [2024-06-27 20:28:10,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204937793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:10,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:10,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:28:10,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310949341] [2024-06-27 20:28:10,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:10,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:28:10,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:10,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:28:10,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:28:10,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:28:10,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:10,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:10,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:28:10,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:11,667 INFO L124 PetriNetUnfolderBase]: 7880/11630 cut-off events. [2024-06-27 20:28:11,667 INFO L125 PetriNetUnfolderBase]: For 17923/17923 co-relation queries the response was YES. [2024-06-27 20:28:11,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34282 conditions, 11630 events. 7880/11630 cut-off events. For 17923/17923 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 69472 event pairs, 4072 based on Foata normal form. 7/11599 useless extension candidates. Maximal degree in co-relation 34263. Up to 10583 conditions per place. [2024-06-27 20:28:11,717 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 75 selfloop transitions, 22 changer transitions 0/106 dead transitions. [2024-06-27 20:28:11,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 106 transitions, 648 flow [2024-06-27 20:28:11,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:28:11,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:28:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 20:28:11,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5440251572327044 [2024-06-27 20:28:11,719 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 173 transitions. [2024-06-27 20:28:11,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 106 transitions, 648 flow [2024-06-27 20:28:11,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 619 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:28:11,723 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 407 flow [2024-06-27 20:28:11,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=407, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-27 20:28:11,724 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-27 20:28:11,724 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 407 flow [2024-06-27 20:28:11,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:11,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:11,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:11,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:28:11,725 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)] === [2024-06-27 20:28:11,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:11,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1534100530, now seen corresponding path program 1 times [2024-06-27 20:28:11,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:11,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577680475] [2024-06-27 20:28:11,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:11,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:12,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:12,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577680475] [2024-06-27 20:28:12,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577680475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:12,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:12,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:28:12,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864100971] [2024-06-27 20:28:12,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:12,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:28:12,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:12,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:28:12,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:28:12,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:12,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 407 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) [2024-06-27 20:28:12,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:12,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:12,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:13,913 INFO L124 PetriNetUnfolderBase]: 9052/12861 cut-off events. [2024-06-27 20:28:13,913 INFO L125 PetriNetUnfolderBase]: For 33928/33940 co-relation queries the response was YES. [2024-06-27 20:28:13,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43822 conditions, 12861 events. 9052/12861 cut-off events. For 33928/33940 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72963 event pairs, 4652 based on Foata normal form. 11/12849 useless extension candidates. Maximal degree in co-relation 43800. Up to 12214 conditions per place. [2024-06-27 20:28:13,996 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 84 selfloop transitions, 21 changer transitions 0/113 dead transitions. [2024-06-27 20:28:13,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 791 flow [2024-06-27 20:28:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:28:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:28:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-27 20:28:13,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-27 20:28:13,998 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 407 flow. Second operand 6 states and 165 transitions. [2024-06-27 20:28:13,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 791 flow [2024-06-27 20:28:14,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 769 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-27 20:28:14,008 INFO L231 Difference]: Finished difference. Result has 74 places, 83 transitions, 514 flow [2024-06-27 20:28:14,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=514, PETRI_PLACES=74, PETRI_TRANSITIONS=83} [2024-06-27 20:28:14,009 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-27 20:28:14,009 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 83 transitions, 514 flow [2024-06-27 20:28:14,009 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) [2024-06-27 20:28:14,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:14,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:14,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:28:14,010 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)] === [2024-06-27 20:28:14,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:14,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2080954004, now seen corresponding path program 2 times [2024-06-27 20:28:14,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:14,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138326701] [2024-06-27 20:28:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:14,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:14,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:14,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:14,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:14,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138326701] [2024-06-27 20:28:14,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138326701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:14,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:14,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:28:14,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337151147] [2024-06-27 20:28:14,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:14,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:28:14,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:14,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:28:14,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:28:14,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:14,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 83 transitions, 514 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) [2024-06-27 20:28:14,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:14,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:14,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:16,101 INFO L124 PetriNetUnfolderBase]: 9043/12850 cut-off events. [2024-06-27 20:28:16,101 INFO L125 PetriNetUnfolderBase]: For 45609/45618 co-relation queries the response was YES. [2024-06-27 20:28:16,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46938 conditions, 12850 events. 9043/12850 cut-off events. For 45609/45618 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 72917 event pairs, 4655 based on Foata normal form. 9/12835 useless extension candidates. Maximal degree in co-relation 46913. Up to 12205 conditions per place. [2024-06-27 20:28:16,175 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 78 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-06-27 20:28:16,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 107 transitions, 774 flow [2024-06-27 20:28:16,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:28:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:28:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 20:28:16,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:28:16,177 INFO L175 Difference]: Start difference. First operand has 74 places, 83 transitions, 514 flow. Second operand 6 states and 159 transitions. [2024-06-27 20:28:16,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 107 transitions, 774 flow [2024-06-27 20:28:16,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 107 transitions, 716 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 20:28:16,206 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 509 flow [2024-06-27 20:28:16,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=509, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-27 20:28:16,207 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 22 predicate places. [2024-06-27 20:28:16,207 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 509 flow [2024-06-27 20:28:16,207 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) [2024-06-27 20:28:16,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:16,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:16,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:28:16,208 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)] === [2024-06-27 20:28:16,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:16,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1635760186, now seen corresponding path program 1 times [2024-06-27 20:28:16,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:16,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905047493] [2024-06-27 20:28:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:16,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:16,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:16,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:16,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905047493] [2024-06-27 20:28:16,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905047493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:16,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:16,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:28:16,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599479088] [2024-06-27 20:28:16,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:16,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:28:16,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:16,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:28:16,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:28:17,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:17,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 509 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) [2024-06-27 20:28:17,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:17,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:17,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:18,311 INFO L124 PetriNetUnfolderBase]: 9134/12988 cut-off events. [2024-06-27 20:28:18,311 INFO L125 PetriNetUnfolderBase]: For 51140/51144 co-relation queries the response was YES. [2024-06-27 20:28:18,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47870 conditions, 12988 events. 9134/12988 cut-off events. For 51140/51144 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73580 event pairs, 4645 based on Foata normal form. 7/12974 useless extension candidates. Maximal degree in co-relation 47843. Up to 12307 conditions per place. [2024-06-27 20:28:18,386 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 102 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2024-06-27 20:28:18,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 142 transitions, 1004 flow [2024-06-27 20:28:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:18,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:18,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 20:28:18,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-27 20:28:18,388 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 509 flow. Second operand 8 states and 214 transitions. [2024-06-27 20:28:18,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 142 transitions, 1004 flow [2024-06-27 20:28:18,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 142 transitions, 930 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:28:18,413 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 667 flow [2024-06-27 20:28:18,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=667, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-27 20:28:18,414 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-27 20:28:18,414 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 667 flow [2024-06-27 20:28:18,414 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) [2024-06-27 20:28:18,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:18,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:18,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:28:18,415 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)] === [2024-06-27 20:28:18,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash 312357262, now seen corresponding path program 2 times [2024-06-27 20:28:18,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:18,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750478855] [2024-06-27 20:28:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:18,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:18,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:19,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:19,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750478855] [2024-06-27 20:28:19,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750478855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:19,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:19,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:28:19,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230380693] [2024-06-27 20:28:19,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:19,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:28:19,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:19,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:28:19,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:28:19,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:19,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 667 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) [2024-06-27 20:28:19,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:19,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:19,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:20,747 INFO L124 PetriNetUnfolderBase]: 9156/13024 cut-off events. [2024-06-27 20:28:20,747 INFO L125 PetriNetUnfolderBase]: For 65400/65408 co-relation queries the response was YES. [2024-06-27 20:28:20,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51435 conditions, 13024 events. 9156/13024 cut-off events. For 65400/65408 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 73728 event pairs, 4503 based on Foata normal form. 11/13012 useless extension candidates. Maximal degree in co-relation 51406. Up to 12314 conditions per place. [2024-06-27 20:28:20,831 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 102 selfloop transitions, 34 changer transitions 0/144 dead transitions. [2024-06-27 20:28:20,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1115 flow [2024-06-27 20:28:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:28:20,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:28:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-27 20:28:20,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-27 20:28:20,833 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 667 flow. Second operand 7 states and 188 transitions. [2024-06-27 20:28:20,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1115 flow [2024-06-27 20:28:20,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 1051 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-27 20:28:20,864 INFO L231 Difference]: Finished difference. Result has 86 places, 106 transitions, 744 flow [2024-06-27 20:28:20,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=744, PETRI_PLACES=86, PETRI_TRANSITIONS=106} [2024-06-27 20:28:20,865 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-27 20:28:20,865 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 106 transitions, 744 flow [2024-06-27 20:28:20,865 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) [2024-06-27 20:28:20,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:20,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:20,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:28:20,865 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)] === [2024-06-27 20:28:20,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:20,866 INFO L85 PathProgramCache]: Analyzing trace with hash 353008240, now seen corresponding path program 3 times [2024-06-27 20:28:20,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:20,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727220070] [2024-06-27 20:28:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:20,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:21,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:21,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727220070] [2024-06-27 20:28:21,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727220070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:21,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:21,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:28:21,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044859333] [2024-06-27 20:28:21,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:21,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:28:21,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:21,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:28:21,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:28:21,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:21,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 106 transitions, 744 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) [2024-06-27 20:28:21,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:21,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:21,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:23,242 INFO L124 PetriNetUnfolderBase]: 9178/13065 cut-off events. [2024-06-27 20:28:23,243 INFO L125 PetriNetUnfolderBase]: For 82655/82669 co-relation queries the response was YES. [2024-06-27 20:28:23,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54813 conditions, 13065 events. 9178/13065 cut-off events. For 82655/82669 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 74045 event pairs, 4516 based on Foata normal form. 11/13051 useless extension candidates. Maximal degree in co-relation 54783. Up to 12258 conditions per place. [2024-06-27 20:28:23,325 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 92 selfloop transitions, 50 changer transitions 0/150 dead transitions. [2024-06-27 20:28:23,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 150 transitions, 1304 flow [2024-06-27 20:28:23,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:28:23,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:28:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-27 20:28:23,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-27 20:28:23,327 INFO L175 Difference]: Start difference. First operand has 86 places, 106 transitions, 744 flow. Second operand 7 states and 192 transitions. [2024-06-27 20:28:23,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 150 transitions, 1304 flow [2024-06-27 20:28:23,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 150 transitions, 1179 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:23,371 INFO L231 Difference]: Finished difference. Result has 88 places, 114 transitions, 856 flow [2024-06-27 20:28:23,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=856, PETRI_PLACES=88, PETRI_TRANSITIONS=114} [2024-06-27 20:28:23,372 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-27 20:28:23,372 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 114 transitions, 856 flow [2024-06-27 20:28:23,372 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) [2024-06-27 20:28:23,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:23,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:23,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:28:23,373 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)] === [2024-06-27 20:28:23,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash 353008426, now seen corresponding path program 1 times [2024-06-27 20:28:23,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:23,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964310223] [2024-06-27 20:28:23,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:23,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:24,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:24,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964310223] [2024-06-27 20:28:24,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964310223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:24,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:24,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:28:24,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101172628] [2024-06-27 20:28:24,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:24,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:28:24,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:24,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:28:24,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:28:24,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:24,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 114 transitions, 856 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) [2024-06-27 20:28:24,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:24,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:24,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:25,684 INFO L124 PetriNetUnfolderBase]: 9334/13280 cut-off events. [2024-06-27 20:28:25,685 INFO L125 PetriNetUnfolderBase]: For 84703/84717 co-relation queries the response was YES. [2024-06-27 20:28:25,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55714 conditions, 13280 events. 9334/13280 cut-off events. For 84703/84717 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 75106 event pairs, 4186 based on Foata normal form. 16/13257 useless extension candidates. Maximal degree in co-relation 55683. Up to 12170 conditions per place. [2024-06-27 20:28:25,770 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 127 selfloop transitions, 43 changer transitions 0/178 dead transitions. [2024-06-27 20:28:25,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 178 transitions, 1626 flow [2024-06-27 20:28:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:28:25,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:28:25,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 205 transitions. [2024-06-27 20:28:25,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525606469002695 [2024-06-27 20:28:25,773 INFO L175 Difference]: Start difference. First operand has 88 places, 114 transitions, 856 flow. Second operand 7 states and 205 transitions. [2024-06-27 20:28:25,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 178 transitions, 1626 flow [2024-06-27 20:28:25,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 178 transitions, 1555 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 20:28:25,835 INFO L231 Difference]: Finished difference. Result has 94 places, 129 transitions, 1058 flow [2024-06-27 20:28:25,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1058, PETRI_PLACES=94, PETRI_TRANSITIONS=129} [2024-06-27 20:28:25,835 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-27 20:28:25,836 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 129 transitions, 1058 flow [2024-06-27 20:28:25,836 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) [2024-06-27 20:28:25,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:25,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:25,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:28:25,836 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:28:25,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:25,837 INFO L85 PathProgramCache]: Analyzing trace with hash 85303078, now seen corresponding path program 2 times [2024-06-27 20:28:25,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:25,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414807111] [2024-06-27 20:28:25,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:25,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:26,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:26,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414807111] [2024-06-27 20:28:26,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414807111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:26,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:26,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:28:26,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243431407] [2024-06-27 20:28:26,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:26,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:28:26,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:26,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:28:26,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:28:26,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:26,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 129 transitions, 1058 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) [2024-06-27 20:28:26,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:26,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:26,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:28,276 INFO L124 PetriNetUnfolderBase]: 9444/13442 cut-off events. [2024-06-27 20:28:28,276 INFO L125 PetriNetUnfolderBase]: For 109677/109698 co-relation queries the response was YES. [2024-06-27 20:28:28,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62037 conditions, 13442 events. 9444/13442 cut-off events. For 109677/109698 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 75994 event pairs, 4143 based on Foata normal form. 21/13428 useless extension candidates. Maximal degree in co-relation 62002. Up to 12270 conditions per place. [2024-06-27 20:28:28,374 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 121 selfloop transitions, 59 changer transitions 0/188 dead transitions. [2024-06-27 20:28:28,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 188 transitions, 1869 flow [2024-06-27 20:28:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:28:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:28:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 20:28:28,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5417789757412399 [2024-06-27 20:28:28,375 INFO L175 Difference]: Start difference. First operand has 94 places, 129 transitions, 1058 flow. Second operand 7 states and 201 transitions. [2024-06-27 20:28:28,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 188 transitions, 1869 flow [2024-06-27 20:28:28,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 188 transitions, 1781 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-27 20:28:28,450 INFO L231 Difference]: Finished difference. Result has 100 places, 143 transitions, 1308 flow [2024-06-27 20:28:28,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=986, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1308, PETRI_PLACES=100, PETRI_TRANSITIONS=143} [2024-06-27 20:28:28,450 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 44 predicate places. [2024-06-27 20:28:28,451 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 143 transitions, 1308 flow [2024-06-27 20:28:28,451 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) [2024-06-27 20:28:28,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:28,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:28,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:28:28,451 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)] === [2024-06-27 20:28:28,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:28,452 INFO L85 PathProgramCache]: Analyzing trace with hash 530139946, now seen corresponding path program 3 times [2024-06-27 20:28:28,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:28,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682856800] [2024-06-27 20:28:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:28,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:29,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:29,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:29,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682856800] [2024-06-27 20:28:29,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682856800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:29,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:29,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:28:29,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727022388] [2024-06-27 20:28:29,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:29,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:28:29,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:29,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:28:29,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:28:29,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:29,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 143 transitions, 1308 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) [2024-06-27 20:28:29,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:29,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:29,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:30,913 INFO L124 PetriNetUnfolderBase]: 9431/13426 cut-off events. [2024-06-27 20:28:30,913 INFO L125 PetriNetUnfolderBase]: For 128426/128447 co-relation queries the response was YES. [2024-06-27 20:28:30,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64653 conditions, 13426 events. 9431/13426 cut-off events. For 128426/128447 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 76038 event pairs, 4157 based on Foata normal form. 21/13412 useless extension candidates. Maximal degree in co-relation 64615. Up to 12263 conditions per place. [2024-06-27 20:28:31,021 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 125 selfloop transitions, 54 changer transitions 0/187 dead transitions. [2024-06-27 20:28:31,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 187 transitions, 1934 flow [2024-06-27 20:28:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:28:31,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:28:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-06-27 20:28:31,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390835579514824 [2024-06-27 20:28:31,022 INFO L175 Difference]: Start difference. First operand has 100 places, 143 transitions, 1308 flow. Second operand 7 states and 200 transitions. [2024-06-27 20:28:31,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 187 transitions, 1934 flow [2024-06-27 20:28:31,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 187 transitions, 1864 flow, removed 34 selfloop flow, removed 1 redundant places. [2024-06-27 20:28:31,155 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1359 flow [2024-06-27 20:28:31,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1359, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-27 20:28:31,156 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-27 20:28:31,156 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1359 flow [2024-06-27 20:28:31,156 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) [2024-06-27 20:28:31,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:31,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:31,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:28:31,156 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)] === [2024-06-27 20:28:31,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:31,157 INFO L85 PathProgramCache]: Analyzing trace with hash 317118862, now seen corresponding path program 4 times [2024-06-27 20:28:31,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:31,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973804780] [2024-06-27 20:28:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:31,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:31,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:31,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973804780] [2024-06-27 20:28:31,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973804780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:31,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:31,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:28:31,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453775356] [2024-06-27 20:28:31,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:31,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:28:31,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:31,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:28:31,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:28:32,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:32,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1359 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) [2024-06-27 20:28:32,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:32,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:32,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:33,624 INFO L124 PetriNetUnfolderBase]: 9422/13432 cut-off events. [2024-06-27 20:28:33,624 INFO L125 PetriNetUnfolderBase]: For 134321/134323 co-relation queries the response was YES. [2024-06-27 20:28:33,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64851 conditions, 13432 events. 9422/13432 cut-off events. For 134321/134323 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 76386 event pairs, 4352 based on Foata normal form. 3/13393 useless extension candidates. Maximal degree in co-relation 64810. Up to 12585 conditions per place. [2024-06-27 20:28:33,744 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 116 selfloop transitions, 50 changer transitions 0/174 dead transitions. [2024-06-27 20:28:33,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 174 transitions, 1789 flow [2024-06-27 20:28:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:28:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:28:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 20:28:33,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-27 20:28:33,746 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1359 flow. Second operand 7 states and 186 transitions. [2024-06-27 20:28:33,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 174 transitions, 1789 flow [2024-06-27 20:28:33,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 174 transitions, 1628 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:33,859 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1309 flow [2024-06-27 20:28:33,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1309, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-27 20:28:33,860 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 50 predicate places. [2024-06-27 20:28:33,860 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1309 flow [2024-06-27 20:28:33,861 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) [2024-06-27 20:28:33,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:33,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:33,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:28:33,861 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)] === [2024-06-27 20:28:33,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:33,861 INFO L85 PathProgramCache]: Analyzing trace with hash 530386024, now seen corresponding path program 1 times [2024-06-27 20:28:33,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:33,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757613697] [2024-06-27 20:28:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:33,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:34,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757613697] [2024-06-27 20:28:34,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757613697] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:34,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:34,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:28:34,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322792722] [2024-06-27 20:28:34,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:34,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:28:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:28:34,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:28:34,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:28:34,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1309 flow. Second operand has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:34,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:34,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:28:34,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:36,268 INFO L124 PetriNetUnfolderBase]: 8418/12450 cut-off events. [2024-06-27 20:28:36,268 INFO L125 PetriNetUnfolderBase]: For 128411/128413 co-relation queries the response was YES. [2024-06-27 20:28:36,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59347 conditions, 12450 events. 8418/12450 cut-off events. For 128411/128413 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 74555 event pairs, 3568 based on Foata normal form. 26/12439 useless extension candidates. Maximal degree in co-relation 59307. Up to 11139 conditions per place. [2024-06-27 20:28:36,371 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 155 selfloop transitions, 25 changer transitions 0/189 dead transitions. [2024-06-27 20:28:36,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 1953 flow [2024-06-27 20:28:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:28:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:28:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-27 20:28:36,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-06-27 20:28:36,372 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1309 flow. Second operand 7 states and 203 transitions. [2024-06-27 20:28:36,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 1953 flow [2024-06-27 20:28:36,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 189 transitions, 1819 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:28:36,495 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1292 flow [2024-06-27 20:28:36,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1292, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-06-27 20:28:36,496 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-27 20:28:36,496 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1292 flow [2024-06-27 20:28:36,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.375) internal successors, (131), 8 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:36,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:36,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:36,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:28:36,497 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:28:36,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:36,497 INFO L85 PathProgramCache]: Analyzing trace with hash -164903164, now seen corresponding path program 1 times [2024-06-27 20:28:36,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:36,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712954921] [2024-06-27 20:28:36,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:36,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:37,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:37,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712954921] [2024-06-27 20:28:37,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712954921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:37,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:37,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:28:37,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260204076] [2024-06-27 20:28:37,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:37,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:28:37,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:37,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:28:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:28:37,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-27 20:28:37,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1292 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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) [2024-06-27 20:28:37,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:37,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-27 20:28:37,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:38,385 INFO L124 PetriNetUnfolderBase]: 7960/11988 cut-off events. [2024-06-27 20:28:38,385 INFO L125 PetriNetUnfolderBase]: For 141320/141337 co-relation queries the response was YES. [2024-06-27 20:28:38,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59317 conditions, 11988 events. 7960/11988 cut-off events. For 141320/141337 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 73844 event pairs, 3697 based on Foata normal form. 19/11981 useless extension candidates. Maximal degree in co-relation 59276. Up to 10734 conditions per place. [2024-06-27 20:28:38,472 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 131 selfloop transitions, 10 changer transitions 0/161 dead transitions. [2024-06-27 20:28:38,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 161 transitions, 1620 flow [2024-06-27 20:28:38,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:28:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:28:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-27 20:28:38,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169811320754717 [2024-06-27 20:28:38,473 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1292 flow. Second operand 5 states and 137 transitions. [2024-06-27 20:28:38,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 161 transitions, 1620 flow [2024-06-27 20:28:38,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 161 transitions, 1525 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:38,577 INFO L231 Difference]: Finished difference. Result has 107 places, 146 transitions, 1226 flow [2024-06-27 20:28:38,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1226, PETRI_PLACES=107, PETRI_TRANSITIONS=146} [2024-06-27 20:28:38,577 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 51 predicate places. [2024-06-27 20:28:38,577 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 146 transitions, 1226 flow [2024-06-27 20:28:38,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 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) [2024-06-27 20:28:38,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:38,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:38,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:28:38,579 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:28:38,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:38,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1945364274, now seen corresponding path program 1 times [2024-06-27 20:28:38,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:38,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221967184] [2024-06-27 20:28:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:38,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:38,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:39,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:39,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221967184] [2024-06-27 20:28:39,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221967184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:39,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:39,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:39,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656245523] [2024-06-27 20:28:39,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:39,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:39,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:39,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:39,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:39,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:39,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 146 transitions, 1226 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) [2024-06-27 20:28:39,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:39,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:39,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:41,230 INFO L124 PetriNetUnfolderBase]: 9710/13837 cut-off events. [2024-06-27 20:28:41,230 INFO L125 PetriNetUnfolderBase]: For 179137/179145 co-relation queries the response was YES. [2024-06-27 20:28:41,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69830 conditions, 13837 events. 9710/13837 cut-off events. For 179137/179145 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 78963 event pairs, 4156 based on Foata normal form. 15/13817 useless extension candidates. Maximal degree in co-relation 69788. Up to 12842 conditions per place. [2024-06-27 20:28:41,337 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 160 selfloop transitions, 48 changer transitions 0/216 dead transitions. [2024-06-27 20:28:41,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2162 flow [2024-06-27 20:28:41,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:41,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 20:28:41,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2024-06-27 20:28:41,338 INFO L175 Difference]: Start difference. First operand has 107 places, 146 transitions, 1226 flow. Second operand 8 states and 230 transitions. [2024-06-27 20:28:41,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2162 flow [2024-06-27 20:28:41,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 216 transitions, 2133 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 20:28:41,446 INFO L231 Difference]: Finished difference. Result has 113 places, 160 transitions, 1521 flow [2024-06-27 20:28:41,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1521, PETRI_PLACES=113, PETRI_TRANSITIONS=160} [2024-06-27 20:28:41,446 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 57 predicate places. [2024-06-27 20:28:41,447 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 160 transitions, 1521 flow [2024-06-27 20:28:41,447 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) [2024-06-27 20:28:41,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:41,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:41,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:28:41,447 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)] === [2024-06-27 20:28:41,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:41,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1941639624, now seen corresponding path program 2 times [2024-06-27 20:28:41,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:41,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036021746] [2024-06-27 20:28:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:41,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:42,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:42,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036021746] [2024-06-27 20:28:42,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036021746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:42,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:42,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:42,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830329628] [2024-06-27 20:28:42,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:42,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:42,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:42,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:42,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:42,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 160 transitions, 1521 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) [2024-06-27 20:28:42,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:42,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:42,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:44,414 INFO L124 PetriNetUnfolderBase]: 9943/14221 cut-off events. [2024-06-27 20:28:44,415 INFO L125 PetriNetUnfolderBase]: For 219819/219824 co-relation queries the response was YES. [2024-06-27 20:28:44,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77313 conditions, 14221 events. 9943/14221 cut-off events. For 219819/219824 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 81675 event pairs, 3981 based on Foata normal form. 7/14185 useless extension candidates. Maximal degree in co-relation 77269. Up to 12358 conditions per place. [2024-06-27 20:28:44,514 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 130 selfloop transitions, 98 changer transitions 0/236 dead transitions. [2024-06-27 20:28:44,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 236 transitions, 2755 flow [2024-06-27 20:28:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:44,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 238 transitions. [2024-06-27 20:28:44,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5613207547169812 [2024-06-27 20:28:44,515 INFO L175 Difference]: Start difference. First operand has 113 places, 160 transitions, 1521 flow. Second operand 8 states and 238 transitions. [2024-06-27 20:28:44,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 236 transitions, 2755 flow [2024-06-27 20:28:44,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 236 transitions, 2612 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 20:28:44,649 INFO L231 Difference]: Finished difference. Result has 119 places, 179 transitions, 1924 flow [2024-06-27 20:28:44,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1924, PETRI_PLACES=119, PETRI_TRANSITIONS=179} [2024-06-27 20:28:44,649 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-27 20:28:44,649 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 179 transitions, 1924 flow [2024-06-27 20:28:44,649 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) [2024-06-27 20:28:44,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:44,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:44,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:28:44,650 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)] === [2024-06-27 20:28:44,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:44,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1941645204, now seen corresponding path program 3 times [2024-06-27 20:28:44,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:44,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971463339] [2024-06-27 20:28:44,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:44,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:44,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:45,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:45,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971463339] [2024-06-27 20:28:45,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971463339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:45,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:45,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:45,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829136447] [2024-06-27 20:28:45,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:45,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:45,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:45,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:45,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:45,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 179 transitions, 1924 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) [2024-06-27 20:28:45,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:45,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:45,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:47,567 INFO L124 PetriNetUnfolderBase]: 9930/14205 cut-off events. [2024-06-27 20:28:47,567 INFO L125 PetriNetUnfolderBase]: For 260631/260636 co-relation queries the response was YES. [2024-06-27 20:28:47,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82897 conditions, 14205 events. 9930/14205 cut-off events. For 260631/260636 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 81644 event pairs, 3995 based on Foata normal form. 7/14169 useless extension candidates. Maximal degree in co-relation 82850. Up to 12351 conditions per place. [2024-06-27 20:28:47,682 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 135 selfloop transitions, 92 changer transitions 0/235 dead transitions. [2024-06-27 20:28:47,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 235 transitions, 2882 flow [2024-06-27 20:28:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-27 20:28:47,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5589622641509434 [2024-06-27 20:28:47,684 INFO L175 Difference]: Start difference. First operand has 119 places, 179 transitions, 1924 flow. Second operand 8 states and 237 transitions. [2024-06-27 20:28:47,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 235 transitions, 2882 flow [2024-06-27 20:28:47,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 235 transitions, 2728 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-27 20:28:47,912 INFO L231 Difference]: Finished difference. Result has 125 places, 179 transitions, 1969 flow [2024-06-27 20:28:47,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1969, PETRI_PLACES=125, PETRI_TRANSITIONS=179} [2024-06-27 20:28:47,913 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-27 20:28:47,913 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 179 transitions, 1969 flow [2024-06-27 20:28:47,913 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) [2024-06-27 20:28:47,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:47,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:47,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:28:47,914 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)] === [2024-06-27 20:28:47,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:47,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1657928050, now seen corresponding path program 4 times [2024-06-27 20:28:47,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:47,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359181540] [2024-06-27 20:28:47,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:47,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:48,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:48,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359181540] [2024-06-27 20:28:48,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359181540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:48,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:48,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:48,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555867767] [2024-06-27 20:28:48,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:48,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:48,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:48,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:48,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:48,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:48,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 179 transitions, 1969 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) [2024-06-27 20:28:48,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:48,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:48,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:50,742 INFO L124 PetriNetUnfolderBase]: 9994/14310 cut-off events. [2024-06-27 20:28:50,742 INFO L125 PetriNetUnfolderBase]: For 268666/268668 co-relation queries the response was YES. [2024-06-27 20:28:50,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82406 conditions, 14310 events. 9994/14310 cut-off events. For 268666/268668 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 82344 event pairs, 3979 based on Foata normal form. 7/14260 useless extension candidates. Maximal degree in co-relation 82357. Up to 12410 conditions per place. [2024-06-27 20:28:50,883 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 133 selfloop transitions, 97 changer transitions 0/238 dead transitions. [2024-06-27 20:28:50,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 238 transitions, 3033 flow [2024-06-27 20:28:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 20:28:50,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495283018867925 [2024-06-27 20:28:50,885 INFO L175 Difference]: Start difference. First operand has 125 places, 179 transitions, 1969 flow. Second operand 8 states and 233 transitions. [2024-06-27 20:28:50,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 238 transitions, 3033 flow [2024-06-27 20:28:51,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 238 transitions, 2784 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:51,077 INFO L231 Difference]: Finished difference. Result has 127 places, 185 transitions, 2048 flow [2024-06-27 20:28:51,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2048, PETRI_PLACES=127, PETRI_TRANSITIONS=185} [2024-06-27 20:28:51,077 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-27 20:28:51,077 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 185 transitions, 2048 flow [2024-06-27 20:28:51,078 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) [2024-06-27 20:28:51,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:51,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:51,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:28:51,078 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)] === [2024-06-27 20:28:51,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:51,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1797749094, now seen corresponding path program 5 times [2024-06-27 20:28:51,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:51,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878787810] [2024-06-27 20:28:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:51,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:52,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:52,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878787810] [2024-06-27 20:28:52,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878787810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:52,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:52,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:52,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649050767] [2024-06-27 20:28:52,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:52,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:52,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:52,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:52,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:52,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 185 transitions, 2048 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) [2024-06-27 20:28:52,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:52,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:52,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:54,029 INFO L124 PetriNetUnfolderBase]: 10058/14416 cut-off events. [2024-06-27 20:28:54,029 INFO L125 PetriNetUnfolderBase]: For 297495/297497 co-relation queries the response was YES. [2024-06-27 20:28:54,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85037 conditions, 14416 events. 10058/14416 cut-off events. For 297495/297497 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83033 event pairs, 3972 based on Foata normal form. 7/14366 useless extension candidates. Maximal degree in co-relation 84987. Up to 12469 conditions per place. [2024-06-27 20:28:54,154 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 131 selfloop transitions, 102 changer transitions 0/241 dead transitions. [2024-06-27 20:28:54,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 241 transitions, 3050 flow [2024-06-27 20:28:54,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-06-27 20:28:54,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-06-27 20:28:54,155 INFO L175 Difference]: Start difference. First operand has 127 places, 185 transitions, 2048 flow. Second operand 8 states and 232 transitions. [2024-06-27 20:28:54,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 241 transitions, 3050 flow [2024-06-27 20:28:54,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 241 transitions, 2693 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:54,534 INFO L231 Difference]: Finished difference. Result has 128 places, 190 transitions, 2005 flow [2024-06-27 20:28:54,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1713, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2005, PETRI_PLACES=128, PETRI_TRANSITIONS=190} [2024-06-27 20:28:54,534 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-27 20:28:54,534 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 190 transitions, 2005 flow [2024-06-27 20:28:54,535 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) [2024-06-27 20:28:54,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:54,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:54,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:28:54,535 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:28:54,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:54,535 INFO L85 PathProgramCache]: Analyzing trace with hash -738178150, now seen corresponding path program 6 times [2024-06-27 20:28:54,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:54,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588833307] [2024-06-27 20:28:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:54,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:55,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:55,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:55,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588833307] [2024-06-27 20:28:55,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588833307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:55,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:55,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:55,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129605609] [2024-06-27 20:28:55,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:55,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:55,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:55,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:55,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:55,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:55,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 190 transitions, 2005 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) [2024-06-27 20:28:55,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:55,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:55,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:57,494 INFO L124 PetriNetUnfolderBase]: 10091/14474 cut-off events. [2024-06-27 20:28:57,494 INFO L125 PetriNetUnfolderBase]: For 320251/320253 co-relation queries the response was YES. [2024-06-27 20:28:57,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85993 conditions, 14474 events. 10091/14474 cut-off events. For 320251/320253 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 83523 event pairs, 3937 based on Foata normal form. 7/14424 useless extension candidates. Maximal degree in co-relation 85943. Up to 12503 conditions per place. [2024-06-27 20:28:57,612 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 114 selfloop transitions, 120 changer transitions 0/242 dead transitions. [2024-06-27 20:28:57,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 242 transitions, 2855 flow [2024-06-27 20:28:57,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:57,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-06-27 20:28:57,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5377358490566038 [2024-06-27 20:28:57,613 INFO L175 Difference]: Start difference. First operand has 128 places, 190 transitions, 2005 flow. Second operand 8 states and 228 transitions. [2024-06-27 20:28:57,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 242 transitions, 2855 flow [2024-06-27 20:28:57,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 242 transitions, 2624 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:57,828 INFO L231 Difference]: Finished difference. Result has 131 places, 195 transitions, 2112 flow [2024-06-27 20:28:57,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2112, PETRI_PLACES=131, PETRI_TRANSITIONS=195} [2024-06-27 20:28:57,829 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-27 20:28:57,829 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 195 transitions, 2112 flow [2024-06-27 20:28:57,829 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) [2024-06-27 20:28:57,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:57,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:57,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:28:57,830 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:28:57,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:57,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1268895667, now seen corresponding path program 1 times [2024-06-27 20:28:57,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:57,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520280177] [2024-06-27 20:28:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:57,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:57,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:58,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:58,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520280177] [2024-06-27 20:28:58,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520280177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:58,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:58,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:58,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803797529] [2024-06-27 20:28:58,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:58,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:58,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:58,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:58,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:58,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:28:58,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 195 transitions, 2112 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) [2024-06-27 20:28:58,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:58,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:28:58,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:00,927 INFO L124 PetriNetUnfolderBase]: 10178/14583 cut-off events. [2024-06-27 20:29:00,928 INFO L125 PetriNetUnfolderBase]: For 349389/349397 co-relation queries the response was YES. [2024-06-27 20:29:00,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88749 conditions, 14583 events. 10178/14583 cut-off events. For 349389/349397 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 84075 event pairs, 3275 based on Foata normal form. 14/14577 useless extension candidates. Maximal degree in co-relation 88698. Up to 13554 conditions per place. [2024-06-27 20:29:01,064 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 207 selfloop transitions, 43 changer transitions 0/258 dead transitions. [2024-06-27 20:29:01,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 258 transitions, 3070 flow [2024-06-27 20:29:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-27 20:29:01,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073375262054507 [2024-06-27 20:29:01,066 INFO L175 Difference]: Start difference. First operand has 131 places, 195 transitions, 2112 flow. Second operand 9 states and 242 transitions. [2024-06-27 20:29:01,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 258 transitions, 3070 flow [2024-06-27 20:29:01,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 258 transitions, 2846 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:01,325 INFO L231 Difference]: Finished difference. Result has 135 places, 201 transitions, 2142 flow [2024-06-27 20:29:01,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2142, PETRI_PLACES=135, PETRI_TRANSITIONS=201} [2024-06-27 20:29:01,325 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-27 20:29:01,326 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 201 transitions, 2142 flow [2024-06-27 20:29:01,326 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) [2024-06-27 20:29:01,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:01,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:01,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:29:01,326 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:29:01,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:01,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1688720449, now seen corresponding path program 2 times [2024-06-27 20:29:01,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:01,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895587823] [2024-06-27 20:29:01,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:01,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:02,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:02,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895587823] [2024-06-27 20:29:02,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895587823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:02,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:02,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:02,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342532746] [2024-06-27 20:29:02,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:02,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:02,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:02,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:02,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:02,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:29:02,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 201 transitions, 2142 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) [2024-06-27 20:29:02,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:02,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:29:02,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:04,267 INFO L124 PetriNetUnfolderBase]: 10163/14562 cut-off events. [2024-06-27 20:29:04,268 INFO L125 PetriNetUnfolderBase]: For 381563/381571 co-relation queries the response was YES. [2024-06-27 20:29:04,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89826 conditions, 14562 events. 10163/14562 cut-off events. For 381563/381571 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 84015 event pairs, 3903 based on Foata normal form. 14/14556 useless extension candidates. Maximal degree in co-relation 89774. Up to 13640 conditions per place. [2024-06-27 20:29:04,393 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 202 selfloop transitions, 37 changer transitions 0/247 dead transitions. [2024-06-27 20:29:04,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 247 transitions, 2772 flow [2024-06-27 20:29:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 20:29:04,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-27 20:29:04,395 INFO L175 Difference]: Start difference. First operand has 135 places, 201 transitions, 2142 flow. Second operand 8 states and 213 transitions. [2024-06-27 20:29:04,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 247 transitions, 2772 flow [2024-06-27 20:29:04,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 247 transitions, 2591 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:04,751 INFO L231 Difference]: Finished difference. Result has 138 places, 201 transitions, 2046 flow [2024-06-27 20:29:04,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1961, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2046, PETRI_PLACES=138, PETRI_TRANSITIONS=201} [2024-06-27 20:29:04,751 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 82 predicate places. [2024-06-27 20:29:04,751 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 201 transitions, 2046 flow [2024-06-27 20:29:04,752 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) [2024-06-27 20:29:04,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:04,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:29:04,752 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)] === [2024-06-27 20:29:04,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:04,752 INFO L85 PathProgramCache]: Analyzing trace with hash -61462865, now seen corresponding path program 3 times [2024-06-27 20:29:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:04,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517039604] [2024-06-27 20:29:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:05,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:05,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517039604] [2024-06-27 20:29:05,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517039604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:05,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:05,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100727067] [2024-06-27 20:29:05,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:05,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:05,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:05,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:05,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:05,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:29:05,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 201 transitions, 2046 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) [2024-06-27 20:29:05,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:05,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:29:05,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:07,748 INFO L124 PetriNetUnfolderBase]: 10199/14613 cut-off events. [2024-06-27 20:29:07,748 INFO L125 PetriNetUnfolderBase]: For 405457/405468 co-relation queries the response was YES. [2024-06-27 20:29:07,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90842 conditions, 14613 events. 10199/14613 cut-off events. For 405457/405468 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 84164 event pairs, 3916 based on Foata normal form. 12/14603 useless extension candidates. Maximal degree in co-relation 90788. Up to 13617 conditions per place. [2024-06-27 20:29:07,887 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 184 selfloop transitions, 53 changer transitions 0/245 dead transitions. [2024-06-27 20:29:07,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 245 transitions, 2730 flow [2024-06-27 20:29:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 20:29:07,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-27 20:29:07,888 INFO L175 Difference]: Start difference. First operand has 138 places, 201 transitions, 2046 flow. Second operand 8 states and 214 transitions. [2024-06-27 20:29:07,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 245 transitions, 2730 flow [2024-06-27 20:29:08,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 245 transitions, 2646 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:08,224 INFO L231 Difference]: Finished difference. Result has 139 places, 204 transitions, 2166 flow [2024-06-27 20:29:08,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2166, PETRI_PLACES=139, PETRI_TRANSITIONS=204} [2024-06-27 20:29:08,224 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-27 20:29:08,224 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 204 transitions, 2166 flow [2024-06-27 20:29:08,224 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) [2024-06-27 20:29:08,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:08,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:08,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:29:08,225 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)] === [2024-06-27 20:29:08,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:08,225 INFO L85 PathProgramCache]: Analyzing trace with hash 863418835, now seen corresponding path program 1 times [2024-06-27 20:29:08,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:08,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519023640] [2024-06-27 20:29:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:08,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:09,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:09,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519023640] [2024-06-27 20:29:09,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519023640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:09,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:09,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:09,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302375154] [2024-06-27 20:29:09,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:09,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:09,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:09,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:09,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:29:09,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 204 transitions, 2166 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) [2024-06-27 20:29:09,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:09,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:29:09,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:11,393 INFO L124 PetriNetUnfolderBase]: 10396/14857 cut-off events. [2024-06-27 20:29:11,393 INFO L125 PetriNetUnfolderBase]: For 452920/452931 co-relation queries the response was YES. [2024-06-27 20:29:11,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94758 conditions, 14857 events. 10396/14857 cut-off events. For 452920/452931 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 85328 event pairs, 3802 based on Foata normal form. 34/14842 useless extension candidates. Maximal degree in co-relation 94703. Up to 13428 conditions per place. [2024-06-27 20:29:11,569 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 200 selfloop transitions, 57 changer transitions 0/265 dead transitions. [2024-06-27 20:29:11,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 265 transitions, 3228 flow [2024-06-27 20:29:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 233 transitions. [2024-06-27 20:29:11,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495283018867925 [2024-06-27 20:29:11,571 INFO L175 Difference]: Start difference. First operand has 139 places, 204 transitions, 2166 flow. Second operand 8 states and 233 transitions. [2024-06-27 20:29:11,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 265 transitions, 3228 flow [2024-06-27 20:29:11,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 265 transitions, 3050 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:11,879 INFO L231 Difference]: Finished difference. Result has 141 places, 207 transitions, 2193 flow [2024-06-27 20:29:11,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2193, PETRI_PLACES=141, PETRI_TRANSITIONS=207} [2024-06-27 20:29:11,880 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-27 20:29:11,880 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 207 transitions, 2193 flow [2024-06-27 20:29:11,880 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) [2024-06-27 20:29:11,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:11,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:11,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:29:11,881 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:29:11,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:11,881 INFO L85 PathProgramCache]: Analyzing trace with hash 932737027, now seen corresponding path program 1 times [2024-06-27 20:29:11,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:11,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054167947] [2024-06-27 20:29:11,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:11,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:12,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:12,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:12,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054167947] [2024-06-27 20:29:12,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054167947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:12,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:12,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:29:12,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770438795] [2024-06-27 20:29:12,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:12,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:29:12,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:12,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:29:12,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:29:12,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:29:12,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 207 transitions, 2193 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-27 20:29:12,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:12,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:29:12,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:14,546 INFO L124 PetriNetUnfolderBase]: 9877/14372 cut-off events. [2024-06-27 20:29:14,546 INFO L125 PetriNetUnfolderBase]: For 475760/475803 co-relation queries the response was YES. [2024-06-27 20:29:14,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94579 conditions, 14372 events. 9877/14372 cut-off events. For 475760/475803 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 85349 event pairs, 3822 based on Foata normal form. 31/14367 useless extension candidates. Maximal degree in co-relation 94523. Up to 13120 conditions per place. [2024-06-27 20:29:14,693 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 181 selfloop transitions, 41 changer transitions 0/242 dead transitions. [2024-06-27 20:29:14,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 242 transitions, 2918 flow [2024-06-27 20:29:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:29:14,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:29:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-27 20:29:14,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-06-27 20:29:14,694 INFO L175 Difference]: Start difference. First operand has 141 places, 207 transitions, 2193 flow. Second operand 6 states and 168 transitions. [2024-06-27 20:29:14,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 242 transitions, 2918 flow [2024-06-27 20:29:15,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 242 transitions, 2743 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:15,020 INFO L231 Difference]: Finished difference. Result has 141 places, 214 transitions, 2215 flow [2024-06-27 20:29:15,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2215, PETRI_PLACES=141, PETRI_TRANSITIONS=214} [2024-06-27 20:29:15,020 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 85 predicate places. [2024-06-27 20:29:15,021 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 214 transitions, 2215 flow [2024-06-27 20:29:15,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-27 20:29:15,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:15,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:15,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:29:15,021 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)] === [2024-06-27 20:29:15,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:15,021 INFO L85 PathProgramCache]: Analyzing trace with hash -191416755, now seen corresponding path program 4 times [2024-06-27 20:29:15,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:15,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776085168] [2024-06-27 20:29:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:15,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:15,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:15,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:15,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776085168] [2024-06-27 20:29:15,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776085168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:15,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:15,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:15,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060694308] [2024-06-27 20:29:15,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:15,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:15,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:15,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:15,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:16,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:29:16,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 214 transitions, 2215 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) [2024-06-27 20:29:16,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:16,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:29:16,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:18,090 INFO L124 PetriNetUnfolderBase]: 10445/14953 cut-off events. [2024-06-27 20:29:18,090 INFO L125 PetriNetUnfolderBase]: For 498972/498974 co-relation queries the response was YES. [2024-06-27 20:29:18,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97571 conditions, 14953 events. 10445/14953 cut-off events. For 498972/498974 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 86149 event pairs, 3924 based on Foata normal form. 6/14918 useless extension candidates. Maximal degree in co-relation 97514. Up to 13963 conditions per place. [2024-06-27 20:29:18,233 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 195 selfloop transitions, 53 changer transitions 0/256 dead transitions. [2024-06-27 20:29:18,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 256 transitions, 2925 flow [2024-06-27 20:29:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 20:29:18,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49764150943396224 [2024-06-27 20:29:18,234 INFO L175 Difference]: Start difference. First operand has 141 places, 214 transitions, 2215 flow. Second operand 8 states and 211 transitions. [2024-06-27 20:29:18,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 256 transitions, 2925 flow [2024-06-27 20:29:18,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 256 transitions, 2838 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 20:29:18,666 INFO L231 Difference]: Finished difference. Result has 146 places, 217 transitions, 2342 flow [2024-06-27 20:29:18,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2128, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2342, PETRI_PLACES=146, PETRI_TRANSITIONS=217} [2024-06-27 20:29:18,667 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-27 20:29:18,667 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 217 transitions, 2342 flow [2024-06-27 20:29:18,667 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) [2024-06-27 20:29:18,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:18,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:18,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:29:18,667 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:29:18,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1095584679, now seen corresponding path program 2 times [2024-06-27 20:29:18,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:18,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375310774] [2024-06-27 20:29:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:18,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:18,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:19,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:19,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375310774] [2024-06-27 20:29:19,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375310774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:19,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:19,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:19,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878730873] [2024-06-27 20:29:19,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:19,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:19,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:19,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:19,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:19,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:29:19,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 217 transitions, 2342 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) [2024-06-27 20:29:19,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:19,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:29:19,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:21,867 INFO L124 PetriNetUnfolderBase]: 10642/15222 cut-off events. [2024-06-27 20:29:21,867 INFO L125 PetriNetUnfolderBase]: For 552522/552543 co-relation queries the response was YES. [2024-06-27 20:29:21,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101538 conditions, 15222 events. 10642/15222 cut-off events. For 552522/552543 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 87705 event pairs, 3733 based on Foata normal form. 40/15216 useless extension candidates. Maximal degree in co-relation 101480. Up to 13751 conditions per place. [2024-06-27 20:29:22,029 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 201 selfloop transitions, 65 changer transitions 0/274 dead transitions. [2024-06-27 20:29:22,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 274 transitions, 3350 flow [2024-06-27 20:29:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-27 20:29:22,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535377358490566 [2024-06-27 20:29:22,030 INFO L175 Difference]: Start difference. First operand has 146 places, 217 transitions, 2342 flow. Second operand 8 states and 227 transitions. [2024-06-27 20:29:22,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 274 transitions, 3350 flow [2024-06-27 20:29:22,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 274 transitions, 3162 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:22,407 INFO L231 Difference]: Finished difference. Result has 148 places, 220 transitions, 2385 flow [2024-06-27 20:29:22,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2385, PETRI_PLACES=148, PETRI_TRANSITIONS=220} [2024-06-27 20:29:22,407 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 92 predicate places. [2024-06-27 20:29:22,407 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 220 transitions, 2385 flow [2024-06-27 20:29:22,408 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) [2024-06-27 20:29:22,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:22,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:22,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:29:22,408 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:29:22,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:22,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1636579287, now seen corresponding path program 3 times [2024-06-27 20:29:22,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:22,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804608618] [2024-06-27 20:29:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:22,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:23,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:23,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804608618] [2024-06-27 20:29:23,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804608618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:23,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:23,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:23,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177750422] [2024-06-27 20:29:23,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:23,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:23,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:23,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:23,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:23,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:29:23,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 220 transitions, 2385 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) [2024-06-27 20:29:23,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:23,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:29:23,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:25,733 INFO L124 PetriNetUnfolderBase]: 10839/15505 cut-off events. [2024-06-27 20:29:25,733 INFO L125 PetriNetUnfolderBase]: For 597887/597908 co-relation queries the response was YES. [2024-06-27 20:29:25,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105930 conditions, 15505 events. 10839/15505 cut-off events. For 597887/597908 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 89569 event pairs, 3769 based on Foata normal form. 40/15499 useless extension candidates. Maximal degree in co-relation 105871. Up to 14034 conditions per place. [2024-06-27 20:29:25,892 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 211 selfloop transitions, 60 changer transitions 0/279 dead transitions. [2024-06-27 20:29:25,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 279 transitions, 3533 flow [2024-06-27 20:29:25,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:25,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 20:29:25,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400943396226415 [2024-06-27 20:29:25,893 INFO L175 Difference]: Start difference. First operand has 148 places, 220 transitions, 2385 flow. Second operand 8 states and 229 transitions. [2024-06-27 20:29:25,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 279 transitions, 3533 flow [2024-06-27 20:29:26,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 279 transitions, 3370 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:26,485 INFO L231 Difference]: Finished difference. Result has 151 places, 223 transitions, 2449 flow [2024-06-27 20:29:26,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2222, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2449, PETRI_PLACES=151, PETRI_TRANSITIONS=223} [2024-06-27 20:29:26,486 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-27 20:29:26,486 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 223 transitions, 2449 flow [2024-06-27 20:29:26,486 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) [2024-06-27 20:29:26,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:26,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:26,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:29:26,487 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:29:26,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:26,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1400107257, now seen corresponding path program 4 times [2024-06-27 20:29:26,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:26,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812882351] [2024-06-27 20:29:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:26,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:27,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:27,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812882351] [2024-06-27 20:29:27,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812882351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:27,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:27,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:27,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965053350] [2024-06-27 20:29:27,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:27,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:27,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:27,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:27,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:27,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:29:27,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 223 transitions, 2449 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) [2024-06-27 20:29:27,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:27,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:29:27,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:29,824 INFO L124 PetriNetUnfolderBase]: 10985/15715 cut-off events. [2024-06-27 20:29:29,824 INFO L125 PetriNetUnfolderBase]: For 635762/635783 co-relation queries the response was YES. [2024-06-27 20:29:29,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108789 conditions, 15715 events. 10985/15715 cut-off events. For 635762/635783 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 90958 event pairs, 3508 based on Foata normal form. 40/15709 useless extension candidates. Maximal degree in co-relation 108729. Up to 13459 conditions per place. [2024-06-27 20:29:29,990 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 200 selfloop transitions, 76 changer transitions 0/284 dead transitions. [2024-06-27 20:29:29,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 284 transitions, 3525 flow [2024-06-27 20:29:29,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:29,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 20:29:29,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424528301886793 [2024-06-27 20:29:29,991 INFO L175 Difference]: Start difference. First operand has 151 places, 223 transitions, 2449 flow. Second operand 8 states and 230 transitions. [2024-06-27 20:29:29,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 284 transitions, 3525 flow [2024-06-27 20:29:30,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 284 transitions, 3334 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:30,606 INFO L231 Difference]: Finished difference. Result has 153 places, 226 transitions, 2522 flow [2024-06-27 20:29:30,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2258, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2522, PETRI_PLACES=153, PETRI_TRANSITIONS=226} [2024-06-27 20:29:30,606 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-27 20:29:30,606 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 226 transitions, 2522 flow [2024-06-27 20:29:30,607 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) [2024-06-27 20:29:30,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:30,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:30,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:29:30,607 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)] === [2024-06-27 20:29:30,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:30,608 INFO L85 PathProgramCache]: Analyzing trace with hash 441895651, now seen corresponding path program 2 times [2024-06-27 20:29:30,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:30,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302098173] [2024-06-27 20:29:30,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:30,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:31,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:31,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302098173] [2024-06-27 20:29:31,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302098173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:31,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:31,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:29:31,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725208752] [2024-06-27 20:29:31,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:31,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:29:31,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:31,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:29:31,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:29:31,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:29:31,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 226 transitions, 2522 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-27 20:29:31,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:31,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:29:31,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:33,838 INFO L124 PetriNetUnfolderBase]: 10281/14991 cut-off events. [2024-06-27 20:29:33,838 INFO L125 PetriNetUnfolderBase]: For 650991/651006 co-relation queries the response was YES. [2024-06-27 20:29:33,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105284 conditions, 14991 events. 10281/14991 cut-off events. For 650991/651006 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 89994 event pairs, 3956 based on Foata normal form. 15/14955 useless extension candidates. Maximal degree in co-relation 105223. Up to 13619 conditions per place. [2024-06-27 20:29:34,007 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 182 selfloop transitions, 41 changer transitions 0/246 dead transitions. [2024-06-27 20:29:34,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 246 transitions, 3028 flow [2024-06-27 20:29:34,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:29:34,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:29:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 20:29:34,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:29:34,008 INFO L175 Difference]: Start difference. First operand has 153 places, 226 transitions, 2522 flow. Second operand 6 states and 159 transitions. [2024-06-27 20:29:34,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 246 transitions, 3028 flow [2024-06-27 20:29:34,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 246 transitions, 2770 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:34,509 INFO L231 Difference]: Finished difference. Result has 153 places, 226 transitions, 2358 flow [2024-06-27 20:29:34,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2358, PETRI_PLACES=153, PETRI_TRANSITIONS=226} [2024-06-27 20:29:34,509 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-27 20:29:34,509 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 226 transitions, 2358 flow [2024-06-27 20:29:34,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-27 20:29:34,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:34,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:34,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:29:34,510 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:29:34,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:34,510 INFO L85 PathProgramCache]: Analyzing trace with hash -422686847, now seen corresponding path program 1 times [2024-06-27 20:29:34,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:34,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070410833] [2024-06-27 20:29:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:34,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:35,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:35,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070410833] [2024-06-27 20:29:35,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070410833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:35,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:35,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:29:35,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598047348] [2024-06-27 20:29:35,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:35,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:29:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:29:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:29:35,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:29:35,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 226 transitions, 2358 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-27 20:29:35,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:35,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:29:35,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:37,778 INFO L124 PetriNetUnfolderBase]: 9825/14481 cut-off events. [2024-06-27 20:29:37,779 INFO L125 PetriNetUnfolderBase]: For 585976/585978 co-relation queries the response was YES. [2024-06-27 20:29:37,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98215 conditions, 14481 events. 9825/14481 cut-off events. For 585976/585978 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 87432 event pairs, 3449 based on Foata normal form. 8/14435 useless extension candidates. Maximal degree in co-relation 98153. Up to 13276 conditions per place. [2024-06-27 20:29:37,908 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 222 selfloop transitions, 25 changer transitions 0/256 dead transitions. [2024-06-27 20:29:37,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 256 transitions, 3104 flow [2024-06-27 20:29:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:29:37,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:29:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-27 20:29:37,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251572327044025 [2024-06-27 20:29:37,910 INFO L175 Difference]: Start difference. First operand has 153 places, 226 transitions, 2358 flow. Second operand 6 states and 167 transitions. [2024-06-27 20:29:37,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 256 transitions, 3104 flow [2024-06-27 20:29:38,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 256 transitions, 2987 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:38,405 INFO L231 Difference]: Finished difference. Result has 154 places, 230 transitions, 2356 flow [2024-06-27 20:29:38,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2356, PETRI_PLACES=154, PETRI_TRANSITIONS=230} [2024-06-27 20:29:38,406 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 98 predicate places. [2024-06-27 20:29:38,406 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 230 transitions, 2356 flow [2024-06-27 20:29:38,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-27 20:29:38,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:38,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:38,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:29:38,407 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)] === [2024-06-27 20:29:38,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:38,407 INFO L85 PathProgramCache]: Analyzing trace with hash -560411123, now seen corresponding path program 2 times [2024-06-27 20:29:38,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:38,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476027730] [2024-06-27 20:29:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:38,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:38,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:39,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:39,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476027730] [2024-06-27 20:29:39,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476027730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:39,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:39,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:29:39,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870853836] [2024-06-27 20:29:39,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:39,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:29:39,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:39,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:29:39,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:29:39,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-27 20:29:39,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 230 transitions, 2356 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-27 20:29:39,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:39,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-27 20:29:39,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:41,490 INFO L124 PetriNetUnfolderBase]: 9673/14215 cut-off events. [2024-06-27 20:29:41,490 INFO L125 PetriNetUnfolderBase]: For 604186/604191 co-relation queries the response was YES. [2024-06-27 20:29:41,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97840 conditions, 14215 events. 9673/14215 cut-off events. For 604186/604191 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 85083 event pairs, 3363 based on Foata normal form. 4/14168 useless extension candidates. Maximal degree in co-relation 97777. Up to 13060 conditions per place. [2024-06-27 20:29:41,622 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 216 selfloop transitions, 26 changer transitions 0/251 dead transitions. [2024-06-27 20:29:41,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 251 transitions, 2902 flow [2024-06-27 20:29:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:29:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:29:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-27 20:29:41,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-27 20:29:41,623 INFO L175 Difference]: Start difference. First operand has 154 places, 230 transitions, 2356 flow. Second operand 6 states and 163 transitions. [2024-06-27 20:29:41,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 251 transitions, 2902 flow [2024-06-27 20:29:42,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 251 transitions, 2851 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-27 20:29:42,052 INFO L231 Difference]: Finished difference. Result has 157 places, 230 transitions, 2366 flow [2024-06-27 20:29:42,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2366, PETRI_PLACES=157, PETRI_TRANSITIONS=230} [2024-06-27 20:29:42,053 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2024-06-27 20:29:42,053 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 230 transitions, 2366 flow [2024-06-27 20:29:42,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 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) [2024-06-27 20:29:42,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:42,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:42,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:29:42,053 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:29:42,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:42,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1272972305, now seen corresponding path program 1 times [2024-06-27 20:29:42,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:42,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420962959] [2024-06-27 20:29:42,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:42,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:42,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:43,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:43,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420962959] [2024-06-27 20:29:43,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420962959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:43,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:43,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:43,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354932543] [2024-06-27 20:29:43,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:43,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:43,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:43,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:43,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:43,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:29:43,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 230 transitions, 2366 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:43,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:43,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:29:43,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:46,551 INFO L124 PetriNetUnfolderBase]: 12896/18583 cut-off events. [2024-06-27 20:29:46,551 INFO L125 PetriNetUnfolderBase]: For 934920/934928 co-relation queries the response was YES. [2024-06-27 20:29:46,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135333 conditions, 18583 events. 12896/18583 cut-off events. For 934920/934928 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 113325 event pairs, 3799 based on Foata normal form. 86/18610 useless extension candidates. Maximal degree in co-relation 135269. Up to 14311 conditions per place. [2024-06-27 20:29:46,741 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 259 selfloop transitions, 62 changer transitions 0/329 dead transitions. [2024-06-27 20:29:46,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 329 transitions, 4050 flow [2024-06-27 20:29:46,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:29:46,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:29:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 297 transitions. [2024-06-27 20:29:46,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560377358490566 [2024-06-27 20:29:46,743 INFO L175 Difference]: Start difference. First operand has 157 places, 230 transitions, 2366 flow. Second operand 10 states and 297 transitions. [2024-06-27 20:29:46,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 329 transitions, 4050 flow [2024-06-27 20:29:47,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 329 transitions, 3966 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:47,356 INFO L231 Difference]: Finished difference. Result has 163 places, 236 transitions, 2651 flow [2024-06-27 20:29:47,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2282, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2651, PETRI_PLACES=163, PETRI_TRANSITIONS=236} [2024-06-27 20:29:47,357 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 107 predicate places. [2024-06-27 20:29:47,357 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 236 transitions, 2651 flow [2024-06-27 20:29:47,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:47,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:47,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:47,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:29:47,357 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:29:47,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:47,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1271094635, now seen corresponding path program 2 times [2024-06-27 20:29:47,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:47,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368343748] [2024-06-27 20:29:47,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:47,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:48,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:48,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368343748] [2024-06-27 20:29:48,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368343748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:48,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:48,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:48,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819752489] [2024-06-27 20:29:48,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:48,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:48,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:48,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:48,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:48,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:29:48,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 236 transitions, 2651 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:48,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:48,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:29:48,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:51,922 INFO L124 PetriNetUnfolderBase]: 13456/19447 cut-off events. [2024-06-27 20:29:51,923 INFO L125 PetriNetUnfolderBase]: For 1043651/1043659 co-relation queries the response was YES. [2024-06-27 20:29:52,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145028 conditions, 19447 events. 13456/19447 cut-off events. For 1043651/1043659 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 120208 event pairs, 4832 based on Foata normal form. 100/19498 useless extension candidates. Maximal degree in co-relation 144961. Up to 17403 conditions per place. [2024-06-27 20:29:52,132 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 239 selfloop transitions, 57 changer transitions 0/304 dead transitions. [2024-06-27 20:29:52,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 304 transitions, 3692 flow [2024-06-27 20:29:52,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 256 transitions. [2024-06-27 20:29:52,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366876310272537 [2024-06-27 20:29:52,138 INFO L175 Difference]: Start difference. First operand has 163 places, 236 transitions, 2651 flow. Second operand 9 states and 256 transitions. [2024-06-27 20:29:52,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 304 transitions, 3692 flow [2024-06-27 20:29:53,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 304 transitions, 3548 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:53,151 INFO L231 Difference]: Finished difference. Result has 167 places, 238 transitions, 2729 flow [2024-06-27 20:29:53,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2507, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2729, PETRI_PLACES=167, PETRI_TRANSITIONS=238} [2024-06-27 20:29:53,152 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 111 predicate places. [2024-06-27 20:29:53,152 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 238 transitions, 2729 flow [2024-06-27 20:29:53,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:53,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:53,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:53,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:29:53,152 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:29:53,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:53,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1677642423, now seen corresponding path program 3 times [2024-06-27 20:29:53,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:53,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243636303] [2024-06-27 20:29:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:53,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:54,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:54,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243636303] [2024-06-27 20:29:54,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243636303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:54,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:54,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:54,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193741518] [2024-06-27 20:29:54,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:54,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:54,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:54,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:29:54,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 238 transitions, 2729 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:54,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:54,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:29:54,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:57,779 INFO L124 PetriNetUnfolderBase]: 13830/20083 cut-off events. [2024-06-27 20:29:57,780 INFO L125 PetriNetUnfolderBase]: For 1076583/1076591 co-relation queries the response was YES. [2024-06-27 20:29:57,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147764 conditions, 20083 events. 13830/20083 cut-off events. For 1076583/1076591 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 126120 event pairs, 4851 based on Foata normal form. 86/20120 useless extension candidates. Maximal degree in co-relation 147695. Up to 16240 conditions per place. [2024-06-27 20:29:57,994 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 250 selfloop transitions, 58 changer transitions 0/316 dead transitions. [2024-06-27 20:29:57,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 316 transitions, 4045 flow [2024-06-27 20:29:57,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-06-27 20:29:57,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549266247379455 [2024-06-27 20:29:57,996 INFO L175 Difference]: Start difference. First operand has 167 places, 238 transitions, 2729 flow. Second operand 9 states and 262 transitions. [2024-06-27 20:29:57,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 316 transitions, 4045 flow [2024-06-27 20:29:58,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 316 transitions, 3868 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:58,937 INFO L231 Difference]: Finished difference. Result has 170 places, 242 transitions, 2862 flow [2024-06-27 20:29:58,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2862, PETRI_PLACES=170, PETRI_TRANSITIONS=242} [2024-06-27 20:29:58,937 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2024-06-27 20:29:58,938 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 242 transitions, 2862 flow [2024-06-27 20:29:58,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:58,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:58,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:58,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:29:58,938 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:29:58,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:58,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1905343851, now seen corresponding path program 4 times [2024-06-27 20:29:58,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:58,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315284384] [2024-06-27 20:29:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:58,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:59,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:59,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315284384] [2024-06-27 20:29:59,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315284384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:59,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:59,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:59,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054424120] [2024-06-27 20:29:59,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:59,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:59,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:00,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:30:00,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 242 transitions, 2862 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:00,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:00,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:30:00,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:04,113 INFO L124 PetriNetUnfolderBase]: 14441/21108 cut-off events. [2024-06-27 20:30:04,113 INFO L125 PetriNetUnfolderBase]: For 1187765/1187770 co-relation queries the response was YES. [2024-06-27 20:30:04,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154682 conditions, 21108 events. 14441/21108 cut-off events. For 1187765/1187770 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 135441 event pairs, 5097 based on Foata normal form. 92/21145 useless extension candidates. Maximal degree in co-relation 154611. Up to 18034 conditions per place. [2024-06-27 20:30:04,350 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 185 selfloop transitions, 116 changer transitions 0/309 dead transitions. [2024-06-27 20:30:04,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 309 transitions, 4196 flow [2024-06-27 20:30:04,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:04,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2024-06-27 20:30:04,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5534591194968553 [2024-06-27 20:30:04,351 INFO L175 Difference]: Start difference. First operand has 170 places, 242 transitions, 2862 flow. Second operand 9 states and 264 transitions. [2024-06-27 20:30:04,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 309 transitions, 4196 flow [2024-06-27 20:30:05,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 309 transitions, 4050 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:05,554 INFO L231 Difference]: Finished difference. Result has 174 places, 244 transitions, 3059 flow [2024-06-27 20:30:05,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3059, PETRI_PLACES=174, PETRI_TRANSITIONS=244} [2024-06-27 20:30:05,555 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 118 predicate places. [2024-06-27 20:30:05,555 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 244 transitions, 3059 flow [2024-06-27 20:30:05,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:05,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:05,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:05,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:30:05,556 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-27 20:30:05,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:05,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1905347571, now seen corresponding path program 5 times [2024-06-27 20:30:05,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:05,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249366559] [2024-06-27 20:30:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:05,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:06,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:06,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249366559] [2024-06-27 20:30:06,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249366559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:06,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:06,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:06,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649889953] [2024-06-27 20:30:06,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:06,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:06,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:06,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:06,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:06,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-27 20:30:06,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 244 transitions, 3059 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:06,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:06,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-27 20:30:06,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand